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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/floats-esbmc-regression/Double_div.i.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-10 01:40:14,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 01:40:14,658 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 01:40:14,669 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-10 01:40:14,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-10 01:40:14,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-10 01:40:14,680 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-10 01:40:14,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-10 01:40:14,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-10 01:40:14,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-10 01:40:14,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-10 01:40:14,687 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-10 01:40:14,688 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-10 01:40:14,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-10 01:40:14,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-10 01:40:14,691 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-10 01:40:14,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-10 01:40:14,696 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-10 01:40:14,697 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-10 01:40:14,698 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-10 01:40:14,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-10 01:40:14,699 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-10 01:40:14,700 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-10 01:40:14,700 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-10 01:40:14,700 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-10 01:40:14,701 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-10 01:40:14,702 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-10 01:40:14,702 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-10 01:40:14,703 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-10 01:40:14,724 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 01:40:14,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 01:40:14,725 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 01:40:14,725 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 01:40:14,726 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 01:40:14,726 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 01:40:14,726 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 01:40:14,727 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 01:40:14,727 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 01:40:14,727 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 01:40:14,729 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 01:40:14,729 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 01:40:14,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 01:40:14,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 01:40:14,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 01:40:14,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 01:40:14,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 01:40:14,731 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 01:40:14,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 01:40:14,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 01:40:14,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 01:40:14,732 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 01:40:14,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 01:40:14,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 01:40:14,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 01:40:14,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 01:40:14,733 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 01:40:14,733 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 01:40:14,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 01:40:14,734 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 01:40:14,767 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 01:40:14,782 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 01:40:14,786 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 01:40:14,789 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 01:40:14,790 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 01:40:14,790 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/floats-esbmc-regression/Double_div.i.p+cfa-reducer.c [2019-09-10 01:40:14,856 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85e5fd0af/73859ed9f7f844b9894b56055ea054fb/FLAG202cc4af6 [2019-09-10 01:40:15,276 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 01:40:15,276 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/floats-esbmc-regression/Double_div.i.p+cfa-reducer.c [2019-09-10 01:40:15,282 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85e5fd0af/73859ed9f7f844b9894b56055ea054fb/FLAG202cc4af6 [2019-09-10 01:40:15,690 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85e5fd0af/73859ed9f7f844b9894b56055ea054fb [2019-09-10 01:40:15,700 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 01:40:15,701 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 01:40:15,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 01:40:15,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 01:40:15,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 01:40:15,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 01:40:15" (1/1) ... [2019-09-10 01:40:15,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2475af2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:15, skipping insertion in model container [2019-09-10 01:40:15,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 01:40:15" (1/1) ... [2019-09-10 01:40:15,718 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 01:40:15,737 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 01:40:15,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 01:40:15,969 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 01:40:15,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 01:40:16,006 INFO L192 MainTranslator]: Completed translation [2019-09-10 01:40:16,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:16 WrapperNode [2019-09-10 01:40:16,007 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 01:40:16,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 01:40:16,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 01:40:16,008 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 01:40:16,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:16" (1/1) ... [2019-09-10 01:40:16,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:16" (1/1) ... [2019-09-10 01:40:16,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:16" (1/1) ... [2019-09-10 01:40:16,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:16" (1/1) ... [2019-09-10 01:40:16,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:16" (1/1) ... [2019-09-10 01:40:16,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:16" (1/1) ... [2019-09-10 01:40:16,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:16" (1/1) ... [2019-09-10 01:40:16,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 01:40:16,137 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 01:40:16,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 01:40:16,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 01:40:16,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:16" (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 [2019-09-10 01:40:16,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 01:40:16,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 01:40:16,194 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 01:40:16,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 01:40:16,194 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-10 01:40:16,195 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 01:40:16,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 01:40:16,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 01:40:16,329 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 01:40:16,330 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-10 01:40:16,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 01:40:16 BoogieIcfgContainer [2019-09-10 01:40:16,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 01:40:16,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 01:40:16,332 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 01:40:16,335 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 01:40:16,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 01:40:15" (1/3) ... [2019-09-10 01:40:16,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba13f02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 01:40:16, skipping insertion in model container [2019-09-10 01:40:16,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:16" (2/3) ... [2019-09-10 01:40:16,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba13f02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 01:40:16, skipping insertion in model container [2019-09-10 01:40:16,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 01:40:16" (3/3) ... [2019-09-10 01:40:16,338 INFO L109 eAbstractionObserver]: Analyzing ICFG Double_div.i.p+cfa-reducer.c [2019-09-10 01:40:16,346 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 01:40:16,351 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 01:40:16,367 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 01:40:16,395 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 01:40:16,396 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 01:40:16,396 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 01:40:16,396 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 01:40:16,396 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 01:40:16,396 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 01:40:16,396 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 01:40:16,397 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 01:40:16,407 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2019-09-10 01:40:16,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-09-10 01:40:16,416 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:40:16,417 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:40:16,419 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:40:16,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:40:16,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1301230683, now seen corresponding path program 1 times [2019-09-10 01:40:16,426 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:40:16,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:16,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:40:16,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:16,463 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:40:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:16,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:16,552 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 01:40:16,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-10 01:40:16,552 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:40:16,555 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-10 01:40:16,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-10 01:40:16,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 01:40:16,569 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2019-09-10 01:40:16,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:40:16,628 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-09-10 01:40:16,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-10 01:40:16,632 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-09-10 01:40:16,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:40:16,650 INFO L225 Difference]: With dead ends: 15 [2019-09-10 01:40:16,653 INFO L226 Difference]: Without dead ends: 11 [2019-09-10 01:40:16,658 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 01:40:16,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-09-10 01:40:16,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-09-10 01:40:16,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-09-10 01:40:16,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-09-10 01:40:16,720 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2019-09-10 01:40:16,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:40:16,720 INFO L475 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-09-10 01:40:16,720 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-10 01:40:16,721 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-09-10 01:40:16,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-10 01:40:16,721 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:40:16,721 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:40:16,722 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:40:16,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:40:16,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1683383028, now seen corresponding path program 1 times [2019-09-10 01:40:16,726 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:40:16,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:16,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:40:16,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:16,731 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:40:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:16,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:16,792 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:16,792 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:40:16,793 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 11 with the following transitions: [2019-09-10 01:40:16,794 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [9], [11], [14], [15], [19], [20], [21] [2019-09-10 01:40:16,820 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 01:40:16,820 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 01:40:16,875 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator COMPLT has no precise implementation. [2019-09-10 01:40:16,876 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator COMPGT has no precise implementation. [2019-09-10 01:40:16,918 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 01:40:16,921 INFO L272 AbstractInterpreter]: Visited 10 different actions 22 times. Merged at 4 different actions 10 times. Widened at 1 different actions 1 times. Performed 69 root evaluator evaluations with a maximum evaluation depth of 3. Performed 69 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 6 variables. [2019-09-10 01:40:16,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:40:16,924 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 01:40:16,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:16,925 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 01:40:16,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:40:16,939 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 01:40:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:16,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-10 01:40:16,965 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:40:17,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:17,024 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:40:17,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:17,065 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 01:40:17,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2019-09-10 01:40:17,066 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 01:40:17,066 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-10 01:40:17,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-10 01:40:17,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-10 01:40:17,067 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 5 states. [2019-09-10 01:40:17,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:40:17,111 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-09-10 01:40:17,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-10 01:40:17,111 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-10 01:40:17,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:40:17,112 INFO L225 Difference]: With dead ends: 12 [2019-09-10 01:40:17,113 INFO L226 Difference]: Without dead ends: 12 [2019-09-10 01:40:17,114 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-09-10 01:40:17,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-09-10 01:40:17,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-09-10 01:40:17,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-09-10 01:40:17,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-09-10 01:40:17,117 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-09-10 01:40:17,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:40:17,118 INFO L475 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-09-10 01:40:17,118 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-10 01:40:17,118 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-09-10 01:40:17,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-10 01:40:17,119 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:40:17,119 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:40:17,119 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:40:17,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:40:17,120 INFO L82 PathProgramCache]: Analyzing trace with hash 645203835, now seen corresponding path program 2 times [2019-09-10 01:40:17,120 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:40:17,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:17,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:40:17,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:17,122 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:40:17,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:17,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:17,171 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:17,172 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:40:17,172 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 01:40:17,173 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 01:40:17,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:17,173 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 01:40:17,189 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-10 01:40:17,189 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-09-10 01:40:17,203 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-10 01:40:17,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 01:40:17,204 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-10 01:40:17,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:40:17,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:17,249 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:40:17,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-10 01:40:17,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 01:40:17,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2019-09-10 01:40:17,301 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 01:40:17,302 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-10 01:40:17,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-10 01:40:17,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-10 01:40:17,302 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2019-09-10 01:40:17,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:40:17,353 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-09-10 01:40:17,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-10 01:40:17,354 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-09-10 01:40:17,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:40:17,355 INFO L225 Difference]: With dead ends: 13 [2019-09-10 01:40:17,355 INFO L226 Difference]: Without dead ends: 13 [2019-09-10 01:40:17,355 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-09-10 01:40:17,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-10 01:40:17,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-10 01:40:17,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-10 01:40:17,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-09-10 01:40:17,359 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-09-10 01:40:17,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:40:17,359 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-09-10 01:40:17,360 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-10 01:40:17,360 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-09-10 01:40:17,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-10 01:40:17,360 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:40:17,361 INFO L399 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:40:17,361 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:40:17,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:40:17,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1473580076, now seen corresponding path program 3 times [2019-09-10 01:40:17,362 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:40:17,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:17,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-10 01:40:17,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:17,363 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:40:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:17,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:17,425 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:17,425 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:40:17,426 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 01:40:17,426 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 01:40:17,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:17,426 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 01:40:17,445 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-10 01:40:17,445 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-09-10 01:40:17,460 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-10 01:40:17,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 01:40:17,461 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-10 01:40:17,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:40:17,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:17,499 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:40:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-10 01:40:17,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 01:40:17,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2019-09-10 01:40:17,539 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 01:40:17,540 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-10 01:40:17,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-10 01:40:17,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-09-10 01:40:17,553 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2019-09-10 01:40:17,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:40:17,630 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-09-10 01:40:17,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-10 01:40:17,631 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-09-10 01:40:17,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:40:17,631 INFO L225 Difference]: With dead ends: 14 [2019-09-10 01:40:17,631 INFO L226 Difference]: Without dead ends: 14 [2019-09-10 01:40:17,632 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2019-09-10 01:40:17,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-10 01:40:17,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-10 01:40:17,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-10 01:40:17,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-09-10 01:40:17,636 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-09-10 01:40:17,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:40:17,637 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-09-10 01:40:17,637 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-10 01:40:17,637 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-09-10 01:40:17,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-10 01:40:17,638 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:40:17,638 INFO L399 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:40:17,638 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:40:17,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:40:17,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1563595419, now seen corresponding path program 4 times [2019-09-10 01:40:17,639 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:40:17,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:17,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-10 01:40:17,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:17,641 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:40:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:17,734 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:17,734 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:17,734 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:40:17,734 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 01:40:17,735 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 01:40:17,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:17,735 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 01:40:17,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:40:17,751 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 01:40:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:17,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-10 01:40:17,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:40:17,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:17,825 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:40:17,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-10 01:40:17,878 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 01:40:17,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 4] total 10 [2019-09-10 01:40:17,878 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 01:40:17,878 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-10 01:40:17,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-10 01:40:17,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-10 01:40:17,879 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 8 states. [2019-09-10 01:40:17,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:40:17,960 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-09-10 01:40:17,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-10 01:40:17,960 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-09-10 01:40:17,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:40:17,961 INFO L225 Difference]: With dead ends: 15 [2019-09-10 01:40:17,961 INFO L226 Difference]: Without dead ends: 15 [2019-09-10 01:40:17,962 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-09-10 01:40:17,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-10 01:40:17,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-10 01:40:17,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-10 01:40:17,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-09-10 01:40:17,965 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-09-10 01:40:17,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:40:17,965 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-09-10 01:40:17,965 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-10 01:40:17,965 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-09-10 01:40:17,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-10 01:40:17,966 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:40:17,966 INFO L399 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:40:17,966 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:40:17,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:40:17,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1226755252, now seen corresponding path program 5 times [2019-09-10 01:40:17,967 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:40:17,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:17,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:40:17,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:17,968 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:40:17,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:18,025 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 01:40:18,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:18,026 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:40:18,026 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 01:40:18,026 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 01:40:18,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:18,026 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-10 01:40:18,039 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-10 01:40:18,040 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 01:40:18,049 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-10 01:40:18,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 01:40:18,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-10 01:40:18,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:40:18,090 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-10 01:40:18,091 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:40:18,119 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-10 01:40:18,123 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-09-10 01:40:18,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [8] total 12 [2019-09-10 01:40:18,123 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:40:18,124 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-10 01:40:18,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-10 01:40:18,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-09-10 01:40:18,125 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 4 states. [2019-09-10 01:40:18,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:40:18,150 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-09-10 01:40:18,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-10 01:40:18,150 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-09-10 01:40:18,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:40:18,151 INFO L225 Difference]: With dead ends: 13 [2019-09-10 01:40:18,151 INFO L226 Difference]: Without dead ends: 0 [2019-09-10 01:40:18,153 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2019-09-10 01:40:18,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-10 01:40:18,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-10 01:40:18,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-10 01:40:18,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-10 01:40:18,155 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2019-09-10 01:40:18,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:40:18,156 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-10 01:40:18,156 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-10 01:40:18,156 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-10 01:40:18,156 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-10 01:40:18,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 01:40:18 BoogieIcfgContainer [2019-09-10 01:40:18,160 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-10 01:40:18,163 INFO L168 Benchmark]: Toolchain (without parser) took 2460.65 ms. Allocated memory was 137.9 MB in the beginning and 233.8 MB in the end (delta: 95.9 MB). Free memory was 91.7 MB in the beginning and 138.9 MB in the end (delta: -47.2 MB). Peak memory consumption was 48.7 MB. Max. memory is 7.1 GB. [2019-09-10 01:40:18,164 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 137.9 MB. Free memory was 109.6 MB in the beginning and 109.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-10 01:40:18,164 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.28 ms. Allocated memory is still 137.9 MB. Free memory was 91.5 MB in the beginning and 82.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-09-10 01:40:18,167 INFO L168 Benchmark]: Boogie Preprocessor took 129.28 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 82.2 MB in the beginning and 179.7 MB in the end (delta: -97.4 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2019-09-10 01:40:18,167 INFO L168 Benchmark]: RCFGBuilder took 193.84 ms. Allocated memory is still 202.4 MB. Free memory was 179.7 MB in the beginning and 170.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2019-09-10 01:40:18,168 INFO L168 Benchmark]: TraceAbstraction took 1828.51 ms. Allocated memory was 202.4 MB in the beginning and 233.8 MB in the end (delta: 31.5 MB). Free memory was 170.2 MB in the beginning and 138.9 MB in the end (delta: 31.3 MB). Peak memory consumption was 62.7 MB. Max. memory is 7.1 GB. [2019-09-10 01:40:18,172 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 137.9 MB. Free memory was 109.6 MB in the beginning and 109.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 305.28 ms. Allocated memory is still 137.9 MB. Free memory was 91.5 MB in the beginning and 82.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 129.28 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 82.2 MB in the beginning and 179.7 MB in the end (delta: -97.4 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 193.84 ms. Allocated memory is still 202.4 MB. Free memory was 179.7 MB in the beginning and 170.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1828.51 ms. Allocated memory was 202.4 MB in the beginning and 233.8 MB in the end (delta: 31.5 MB). Free memory was 170.2 MB in the beginning and 138.9 MB in the end (delta: 31.3 MB). Peak memory consumption was 62.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 14 locations, 1 error locations. SAFE Result, 1.7s OverallTime, 6 OverallIterations, 5 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 55 SDtfs, 1 SDslu, 120 SDs, 0 SdLazy, 40 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 159 GetRequests, 98 SyntacticMatches, 13 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 129 NumberOfCodeBlocks, 126 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 173 ConstructedInterpolants, 0 QuantifiedInterpolants, 3592 SizeOfPredicates, 22 NumberOfNonLiveVariables, 195 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 16 InterpolantComputations, 3 PerfectInterpolantSequences, 40/105 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...