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/Float_div_bad.i.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-10 01:40:27,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 01:40:27,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 01:40:27,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-10 01:40:27,391 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-10 01:40:27,391 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-10 01:40:27,392 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-10 01:40:27,393 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-10 01:40:27,394 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-10 01:40:27,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-10 01:40:27,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-10 01:40:27,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-10 01:40:27,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-10 01:40:27,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-10 01:40:27,402 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-10 01:40:27,403 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-10 01:40:27,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-10 01:40:27,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-10 01:40:27,408 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-10 01:40:27,409 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-10 01:40:27,410 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-10 01:40:27,411 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-10 01:40:27,411 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-10 01:40:27,412 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-10 01:40:27,412 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-10 01:40:27,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-10 01:40:27,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-10 01:40:27,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-10 01:40:27,414 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 01:40:27,428 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 01:40:27,429 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 01:40:27,429 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 01:40:27,429 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 01:40:27,430 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 01:40:27,430 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 01:40:27,430 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 01:40:27,431 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 01:40:27,431 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 01:40:27,431 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 01:40:27,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 01:40:27,432 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 01:40:27,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 01:40:27,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 01:40:27,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 01:40:27,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 01:40:27,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 01:40:27,433 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 01:40:27,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 01:40:27,433 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 01:40:27,433 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 01:40:27,434 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 01:40:27,434 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 01:40:27,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 01:40:27,434 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 01:40:27,434 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 01:40:27,435 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 01:40:27,435 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 01:40:27,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 01:40:27,435 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 01:40:27,469 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 01:40:27,481 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 01:40:27,484 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 01:40:27,485 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 01:40:27,485 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 01:40:27,486 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/floats-esbmc-regression/Float_div_bad.i.p+cfa-reducer.c [2019-09-10 01:40:27,557 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dff29c7f/4143f487d3ed4ec9a7e51de078ded672/FLAG9d9d3d1a4 [2019-09-10 01:40:28,001 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 01:40:28,002 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/floats-esbmc-regression/Float_div_bad.i.p+cfa-reducer.c [2019-09-10 01:40:28,008 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dff29c7f/4143f487d3ed4ec9a7e51de078ded672/FLAG9d9d3d1a4 [2019-09-10 01:40:28,373 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dff29c7f/4143f487d3ed4ec9a7e51de078ded672 [2019-09-10 01:40:28,381 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 01:40:28,383 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 01:40:28,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 01:40:28,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 01:40:28,387 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 01:40:28,388 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 01:40:28" (1/1) ... [2019-09-10 01:40:28,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62d268b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:28, skipping insertion in model container [2019-09-10 01:40:28,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 01:40:28" (1/1) ... [2019-09-10 01:40:28,398 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 01:40:28,414 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 01:40:28,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 01:40:28,568 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 01:40:28,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 01:40:28,600 INFO L192 MainTranslator]: Completed translation [2019-09-10 01:40:28,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:28 WrapperNode [2019-09-10 01:40:28,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 01:40:28,602 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 01:40:28,602 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 01:40:28,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 01:40:28,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:28" (1/1) ... [2019-09-10 01:40:28,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:28" (1/1) ... [2019-09-10 01:40:28,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:28" (1/1) ... [2019-09-10 01:40:28,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:28" (1/1) ... [2019-09-10 01:40:28,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:28" (1/1) ... [2019-09-10 01:40:28,724 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:28" (1/1) ... [2019-09-10 01:40:28,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:28" (1/1) ... [2019-09-10 01:40:28,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 01:40:28,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 01:40:28,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 01:40:28,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 01:40:28,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:28" (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 01:40:28,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 01:40:28,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 01:40:28,775 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 01:40:28,775 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 01:40:28,775 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-10 01:40:28,775 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 01:40:28,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 01:40:28,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 01:40:28,915 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 01:40:28,915 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-10 01:40:28,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 01:40:28 BoogieIcfgContainer [2019-09-10 01:40:28,916 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 01:40:28,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 01:40:28,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 01:40:28,920 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 01:40:28,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 01:40:28" (1/3) ... [2019-09-10 01:40:28,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c12df44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 01:40:28, skipping insertion in model container [2019-09-10 01:40:28,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:40:28" (2/3) ... [2019-09-10 01:40:28,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c12df44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 01:40:28, skipping insertion in model container [2019-09-10 01:40:28,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 01:40:28" (3/3) ... [2019-09-10 01:40:28,925 INFO L109 eAbstractionObserver]: Analyzing ICFG Float_div_bad.i.p+cfa-reducer.c [2019-09-10 01:40:28,937 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 01:40:28,947 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 01:40:28,959 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 01:40:28,984 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 01:40:28,984 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 01:40:28,984 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 01:40:28,984 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 01:40:28,984 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 01:40:28,984 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 01:40:28,985 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 01:40:28,985 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 01:40:29,000 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2019-09-10 01:40:29,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-09-10 01:40:29,010 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:40:29,011 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:40:29,013 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:40:29,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:40:29,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1301230683, now seen corresponding path program 1 times [2019-09-10 01:40:29,021 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:40:29,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:29,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:40:29,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:29,066 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:40:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:29,180 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 01:40:29,182 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 01:40:29,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-10 01:40:29,183 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:40:29,186 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-10 01:40:29,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-10 01:40:29,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-10 01:40:29,200 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2019-09-10 01:40:29,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:40:29,272 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-09-10 01:40:29,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-10 01:40:29,274 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-09-10 01:40:29,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:40:29,289 INFO L225 Difference]: With dead ends: 15 [2019-09-10 01:40:29,290 INFO L226 Difference]: Without dead ends: 11 [2019-09-10 01:40:29,292 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 01:40:29,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-09-10 01:40:29,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-09-10 01:40:29,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-09-10 01:40:29,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-09-10 01:40:29,336 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2019-09-10 01:40:29,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:40:29,336 INFO L475 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-09-10 01:40:29,337 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-10 01:40:29,337 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-09-10 01:40:29,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-10 01:40:29,338 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:40:29,338 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:40:29,338 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:40:29,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:40:29,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1683383028, now seen corresponding path program 1 times [2019-09-10 01:40:29,339 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:40:29,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:29,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:40:29,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:29,340 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:40:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:29,413 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 01:40:29,413 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:29,414 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:40:29,414 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 11 with the following transitions: [2019-09-10 01:40:29,416 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [9], [11], [14], [15], [19], [20], [21] [2019-09-10 01:40:29,449 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 01:40:29,449 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 01:40:29,503 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator COMPLT has no precise implementation. [2019-09-10 01:40:29,504 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator COMPGT has no precise implementation. [2019-09-10 01:40:29,552 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 01:40:29,555 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 01:40:29,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:40:29,559 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 01:40:29,559 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:29,559 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 01:40:29,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:40:29,577 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 01:40:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:29,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-10 01:40:29,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:40:29,662 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 01:40:29,663 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:40:29,719 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 01:40:29,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 01:40:29,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2019-09-10 01:40:29,725 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 01:40:29,726 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-10 01:40:29,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-10 01:40:29,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-10 01:40:29,728 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 5 states. [2019-09-10 01:40:29,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:40:29,770 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-09-10 01:40:29,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-10 01:40:29,771 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-10 01:40:29,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:40:29,772 INFO L225 Difference]: With dead ends: 12 [2019-09-10 01:40:29,772 INFO L226 Difference]: Without dead ends: 12 [2019-09-10 01:40:29,773 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-09-10 01:40:29,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-09-10 01:40:29,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-09-10 01:40:29,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-09-10 01:40:29,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-09-10 01:40:29,777 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-09-10 01:40:29,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:40:29,777 INFO L475 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-09-10 01:40:29,777 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-10 01:40:29,778 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-09-10 01:40:29,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-10 01:40:29,778 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:40:29,779 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:40:29,779 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:40:29,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:40:29,780 INFO L82 PathProgramCache]: Analyzing trace with hash 645203835, now seen corresponding path program 2 times [2019-09-10 01:40:29,780 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:40:29,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:29,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:40:29,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:29,782 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:40:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:29,878 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 01:40:29,878 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:29,878 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:40:29,878 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 01:40:29,879 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 01:40:29,879 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:29,879 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) [2019-09-10 01:40:29,897 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-10 01:40:29,897 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 01:40:29,915 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-10 01:40:29,916 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 01:40:29,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-10 01:40:29,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:40:29,955 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 01:40:29,955 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:40:30,000 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 01:40:30,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 01:40:30,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2019-09-10 01:40:30,005 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 01:40:30,006 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-10 01:40:30,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-10 01:40:30,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-10 01:40:30,007 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2019-09-10 01:40:30,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:40:30,074 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-09-10 01:40:30,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-10 01:40:30,075 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-09-10 01:40:30,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:40:30,076 INFO L225 Difference]: With dead ends: 13 [2019-09-10 01:40:30,076 INFO L226 Difference]: Without dead ends: 13 [2019-09-10 01:40:30,077 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 01:40:30,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-10 01:40:30,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-10 01:40:30,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-10 01:40:30,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-09-10 01:40:30,081 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-09-10 01:40:30,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:40:30,082 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-09-10 01:40:30,082 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-10 01:40:30,082 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-09-10 01:40:30,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-10 01:40:30,083 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:40:30,083 INFO L399 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:40:30,083 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:40:30,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:40:30,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1473580076, now seen corresponding path program 3 times [2019-09-10 01:40:30,084 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:40:30,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:30,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-10 01:40:30,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:30,086 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:40:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:30,164 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 01:40:30,165 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:30,165 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:40:30,165 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 01:40:30,165 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 01:40:30,165 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:30,166 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 01:40:30,183 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-10 01:40:30,184 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-09-10 01:40:30,201 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-10 01:40:30,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 01:40:30,202 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-10 01:40:30,204 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:40:30,258 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 01:40:30,258 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:40:30,299 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 01:40:30,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 01:40:30,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2019-09-10 01:40:30,318 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 01:40:30,318 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-10 01:40:30,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-10 01:40:30,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-09-10 01:40:30,319 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2019-09-10 01:40:30,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:40:30,413 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-09-10 01:40:30,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-10 01:40:30,414 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-09-10 01:40:30,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:40:30,414 INFO L225 Difference]: With dead ends: 14 [2019-09-10 01:40:30,414 INFO L226 Difference]: Without dead ends: 14 [2019-09-10 01:40:30,415 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 01:40:30,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-10 01:40:30,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-10 01:40:30,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-10 01:40:30,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-09-10 01:40:30,418 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-09-10 01:40:30,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:40:30,419 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-09-10 01:40:30,419 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-10 01:40:30,419 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-09-10 01:40:30,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-10 01:40:30,419 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:40:30,420 INFO L399 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:40:30,420 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:40:30,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:40:30,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1563595419, now seen corresponding path program 4 times [2019-09-10 01:40:30,421 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:40:30,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:30,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-10 01:40:30,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:30,422 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:40:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:30,498 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 01:40:30,498 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:30,498 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:40:30,499 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 01:40:30,499 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 01:40:30,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:30,499 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 01:40:30,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:40:30,514 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 01:40:30,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:30,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-10 01:40:30,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:40:30,592 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 01:40:30,593 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:40:30,649 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 01:40:30,654 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 01:40:30,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 4] total 10 [2019-09-10 01:40:30,654 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 01:40:30,655 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-10 01:40:30,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-10 01:40:30,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-10 01:40:30,656 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 8 states. [2019-09-10 01:40:30,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:40:30,765 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-09-10 01:40:30,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-10 01:40:30,766 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-09-10 01:40:30,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:40:30,767 INFO L225 Difference]: With dead ends: 15 [2019-09-10 01:40:30,767 INFO L226 Difference]: Without dead ends: 15 [2019-09-10 01:40:30,770 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-09-10 01:40:30,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-10 01:40:30,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-10 01:40:30,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-10 01:40:30,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-09-10 01:40:30,778 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-09-10 01:40:30,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:40:30,778 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-09-10 01:40:30,778 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-10 01:40:30,778 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-09-10 01:40:30,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-10 01:40:30,779 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:40:30,779 INFO L399 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:40:30,779 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:40:30,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:40:30,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1226755252, now seen corresponding path program 5 times [2019-09-10 01:40:30,780 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:40:30,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:30,783 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:40:30,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:40:30,783 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:40:30,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:40:30,890 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 01:40:30,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:30,890 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:40:30,890 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 01:40:30,891 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 01:40:30,891 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:40:30,891 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 01:40:30,904 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-10 01:40:30,905 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 01:40:30,914 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-10 01:40:30,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 01:40:30,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-10 01:40:30,916 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 01:40:30,956 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 01:40:30,957 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 01:40:30,995 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 01:40:30,999 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-09-10 01:40:30,999 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [8] total 12 [2019-09-10 01:40:30,999 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:40:31,000 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-10 01:40:31,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-10 01:40:31,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-09-10 01:40:31,001 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 4 states. [2019-09-10 01:40:31,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:40:31,031 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-09-10 01:40:31,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-10 01:40:31,031 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-09-10 01:40:31,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:40:31,032 INFO L225 Difference]: With dead ends: 13 [2019-09-10 01:40:31,032 INFO L226 Difference]: Without dead ends: 0 [2019-09-10 01:40:31,034 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2019-09-10 01:40:31,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-10 01:40:31,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-10 01:40:31,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-10 01:40:31,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-10 01:40:31,034 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2019-09-10 01:40:31,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:40:31,034 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-10 01:40:31,035 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-10 01:40:31,035 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-10 01:40:31,035 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-10 01:40:31,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 01:40:31 BoogieIcfgContainer [2019-09-10 01:40:31,040 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-10 01:40:31,042 INFO L168 Benchmark]: Toolchain (without parser) took 2659.20 ms. Allocated memory was 135.3 MB in the beginning and 230.7 MB in the end (delta: 95.4 MB). Free memory was 90.3 MB in the beginning and 131.4 MB in the end (delta: -41.1 MB). Peak memory consumption was 54.3 MB. Max. memory is 7.1 GB. [2019-09-10 01:40:31,043 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 135.3 MB. Free memory was 108.5 MB in the beginning and 108.3 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2019-09-10 01:40:31,044 INFO L168 Benchmark]: CACSL2BoogieTranslator took 217.55 ms. Allocated memory is still 135.3 MB. Free memory was 89.8 MB in the beginning and 80.7 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2019-09-10 01:40:31,045 INFO L168 Benchmark]: Boogie Preprocessor took 124.24 ms. Allocated memory was 135.3 MB in the beginning and 201.9 MB in the end (delta: 66.6 MB). Free memory was 80.7 MB in the beginning and 178.6 MB in the end (delta: -97.8 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. [2019-09-10 01:40:31,046 INFO L168 Benchmark]: RCFGBuilder took 190.29 ms. Allocated memory is still 201.9 MB. Free memory was 178.6 MB in the beginning and 169.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2019-09-10 01:40:31,047 INFO L168 Benchmark]: TraceAbstraction took 2122.74 ms. Allocated memory was 201.9 MB in the beginning and 230.7 MB in the end (delta: 28.8 MB). Free memory was 169.2 MB in the beginning and 131.4 MB in the end (delta: 37.8 MB). Peak memory consumption was 66.6 MB. Max. memory is 7.1 GB. [2019-09-10 01:40:31,051 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 135.3 MB. Free memory was 108.5 MB in the beginning and 108.3 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 217.55 ms. Allocated memory is still 135.3 MB. Free memory was 89.8 MB in the beginning and 80.7 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.24 ms. Allocated memory was 135.3 MB in the beginning and 201.9 MB in the end (delta: 66.6 MB). Free memory was 80.7 MB in the beginning and 178.6 MB in the end (delta: -97.8 MB). Peak memory consumption was 16.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 190.29 ms. Allocated memory is still 201.9 MB. Free memory was 178.6 MB in the beginning and 169.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2122.74 ms. Allocated memory was 201.9 MB in the beginning and 230.7 MB in the end (delta: 28.8 MB). Free memory was 169.2 MB in the beginning and 131.4 MB in the end (delta: 37.8 MB). Peak memory consumption was 66.6 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, 2.0s 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, 0.7s 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, 0.9s 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...