./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/Fibonacci01-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30f4e4ab Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/Fibonacci01-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0f8f22ce4f3bf9068fc0240f174785871ced813b ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-30f4e4a [2019-11-28 00:24:05,390 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 00:24:05,392 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 00:24:05,405 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 00:24:05,406 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 00:24:05,407 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 00:24:05,408 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 00:24:05,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 00:24:05,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 00:24:05,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 00:24:05,414 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 00:24:05,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 00:24:05,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 00:24:05,417 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 00:24:05,418 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 00:24:05,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 00:24:05,420 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 00:24:05,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 00:24:05,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 00:24:05,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 00:24:05,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 00:24:05,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 00:24:05,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 00:24:05,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 00:24:05,432 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 00:24:05,433 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 00:24:05,433 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 00:24:05,434 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 00:24:05,434 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 00:24:05,436 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 00:24:05,437 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 00:24:05,438 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 00:24:05,439 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 00:24:05,440 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 00:24:05,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 00:24:05,444 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 00:24:05,445 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 00:24:05,445 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 00:24:05,446 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 00:24:05,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 00:24:05,450 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 00:24:05,452 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 00:24:05,473 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 00:24:05,474 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 00:24:05,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 00:24:05,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 00:24:05,476 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 00:24:05,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 00:24:05,476 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 00:24:05,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 00:24:05,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 00:24:05,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 00:24:05,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 00:24:05,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 00:24:05,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 00:24:05,479 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 00:24:05,480 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 00:24:05,480 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 00:24:05,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 00:24:05,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 00:24:05,481 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 00:24:05,481 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 00:24:05,482 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 00:24:05,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 00:24:05,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 00:24:05,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 00:24:05,483 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 00:24:05,483 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 00:24:05,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 00:24:05,483 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 00:24:05,484 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f8f22ce4f3bf9068fc0240f174785871ced813b [2019-11-28 00:24:05,800 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 00:24:05,819 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 00:24:05,824 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 00:24:05,825 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 00:24:05,826 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 00:24:05,827 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Fibonacci01-1.c [2019-11-28 00:24:05,901 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5479356b0/f076d695a97548538e1065fad9bfb76b/FLAG2cf831d11 [2019-11-28 00:24:06,372 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 00:24:06,372 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci01-1.c [2019-11-28 00:24:06,378 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5479356b0/f076d695a97548538e1065fad9bfb76b/FLAG2cf831d11 [2019-11-28 00:24:06,804 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5479356b0/f076d695a97548538e1065fad9bfb76b [2019-11-28 00:24:06,807 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 00:24:06,809 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 00:24:06,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 00:24:06,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 00:24:06,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 00:24:06,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:24:06" (1/1) ... [2019-11-28 00:24:06,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2649282b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:06, skipping insertion in model container [2019-11-28 00:24:06,820 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:24:06" (1/1) ... [2019-11-28 00:24:06,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 00:24:06,857 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 00:24:07,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 00:24:07,088 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 00:24:07,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 00:24:07,124 INFO L208 MainTranslator]: Completed translation [2019-11-28 00:24:07,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:07 WrapperNode [2019-11-28 00:24:07,126 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 00:24:07,127 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 00:24:07,127 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 00:24:07,127 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 00:24:07,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:07" (1/1) ... [2019-11-28 00:24:07,144 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:07" (1/1) ... [2019-11-28 00:24:07,231 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 00:24:07,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 00:24:07,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 00:24:07,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 00:24:07,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:07" (1/1) ... [2019-11-28 00:24:07,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:07" (1/1) ... [2019-11-28 00:24:07,244 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:07" (1/1) ... [2019-11-28 00:24:07,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:07" (1/1) ... [2019-11-28 00:24:07,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:07" (1/1) ... [2019-11-28 00:24:07,251 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:07" (1/1) ... [2019-11-28 00:24:07,257 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:07" (1/1) ... [2019-11-28 00:24:07,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 00:24:07,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 00:24:07,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 00:24:07,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 00:24:07,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 00:24:07,327 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2019-11-28 00:24:07,327 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2019-11-28 00:24:07,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 00:24:07,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 00:24:07,516 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 00:24:07,516 INFO L297 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 00:24:07,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:24:07 BoogieIcfgContainer [2019-11-28 00:24:07,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 00:24:07,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 00:24:07,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 00:24:07,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 00:24:07,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 12:24:06" (1/3) ... [2019-11-28 00:24:07,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fff033d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:24:07, skipping insertion in model container [2019-11-28 00:24:07,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:24:07" (2/3) ... [2019-11-28 00:24:07,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fff033d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:24:07, skipping insertion in model container [2019-11-28 00:24:07,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:24:07" (3/3) ... [2019-11-28 00:24:07,525 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c [2019-11-28 00:24:07,533 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 00:24:07,539 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 00:24:07,552 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 00:24:07,577 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 00:24:07,577 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 00:24:07,578 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 00:24:07,578 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 00:24:07,578 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 00:24:07,578 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 00:24:07,578 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 00:24:07,578 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 00:24:07,597 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-28 00:24:07,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-28 00:24:07,603 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:24:07,604 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:24:07,605 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:24:07,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:24:07,611 INFO L82 PathProgramCache]: Analyzing trace with hash -337677157, now seen corresponding path program 1 times [2019-11-28 00:24:07,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:24:07,621 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658804138] [2019-11-28 00:24:07,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:24:07,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 00:24:07,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658804138] [2019-11-28 00:24:07,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 00:24:07,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-28 00:24:07,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903324623] [2019-11-28 00:24:07,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 00:24:07,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:24:07,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 00:24:07,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-28 00:24:07,915 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 6 states. [2019-11-28 00:24:08,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:24:08,103 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2019-11-28 00:24:08,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 00:24:08,105 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-11-28 00:24:08,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:24:08,114 INFO L225 Difference]: With dead ends: 31 [2019-11-28 00:24:08,115 INFO L226 Difference]: Without dead ends: 18 [2019-11-28 00:24:08,118 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-28 00:24:08,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-28 00:24:08,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-28 00:24:08,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-28 00:24:08,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-11-28 00:24:08,157 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2019-11-28 00:24:08,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:24:08,158 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-11-28 00:24:08,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 00:24:08,158 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-11-28 00:24:08,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-28 00:24:08,160 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:24:08,161 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:24:08,161 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:24:08,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:24:08,161 INFO L82 PathProgramCache]: Analyzing trace with hash -461887010, now seen corresponding path program 1 times [2019-11-28 00:24:08,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:24:08,162 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996705500] [2019-11-28 00:24:08,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:24:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:08,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:08,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-28 00:24:08,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996705500] [2019-11-28 00:24:08,328 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487442882] [2019-11-28 00:24:08,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:24:08,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:08,370 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-28 00:24:08,377 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:24:08,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-28 00:24:08,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-28 00:24:08,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2019-11-28 00:24:08,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414799435] [2019-11-28 00:24:08,445 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 00:24:08,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:24:08,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 00:24:08,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-28 00:24:08,447 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 6 states. [2019-11-28 00:24:08,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:24:08,576 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2019-11-28 00:24:08,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 00:24:08,577 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-11-28 00:24:08,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:24:08,578 INFO L225 Difference]: With dead ends: 35 [2019-11-28 00:24:08,578 INFO L226 Difference]: Without dead ends: 20 [2019-11-28 00:24:08,580 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-11-28 00:24:08,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-28 00:24:08,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-28 00:24:08,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-28 00:24:08,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-11-28 00:24:08,595 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 23 [2019-11-28 00:24:08,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:24:08,597 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-11-28 00:24:08,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 00:24:08,597 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-11-28 00:24:08,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-28 00:24:08,600 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:24:08,601 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:24:08,802 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:24:08,803 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:24:08,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:24:08,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1032875874, now seen corresponding path program 1 times [2019-11-28 00:24:08,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:24:08,805 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264528406] [2019-11-28 00:24:08,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:24:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:08,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 00:24:09,027 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264528406] [2019-11-28 00:24:09,027 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052950240] [2019-11-28 00:24:09,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-11-28 00:24:09,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:24:09,064 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-28 00:24:09,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:24:09,248 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 00:24:09,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:24:09,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2019-11-28 00:24:09,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510360245] [2019-11-28 00:24:09,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-28 00:24:09,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:24:09,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-28 00:24:09,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2019-11-28 00:24:09,255 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 17 states. [2019-11-28 00:24:09,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:24:09,550 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2019-11-28 00:24:09,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 00:24:09,551 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2019-11-28 00:24:09,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:24:09,554 INFO L225 Difference]: With dead ends: 30 [2019-11-28 00:24:09,554 INFO L226 Difference]: Without dead ends: 26 [2019-11-28 00:24:09,555 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2019-11-28 00:24:09,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-28 00:24:09,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2019-11-28 00:24:09,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-28 00:24:09,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2019-11-28 00:24:09,569 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 24 [2019-11-28 00:24:09,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:24:09,570 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2019-11-28 00:24:09,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-28 00:24:09,570 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2019-11-28 00:24:09,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-28 00:24:09,573 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:24:09,574 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:24:09,787 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:24:09,787 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:24:09,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:24:09,787 INFO L82 PathProgramCache]: Analyzing trace with hash 498258551, now seen corresponding path program 2 times [2019-11-28 00:24:09,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:24:09,788 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677312937] [2019-11-28 00:24:09,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:24:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:09,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:10,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:10,021 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-28 00:24:10,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677312937] [2019-11-28 00:24:10,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191926984] [2019-11-28 00:24:10,022 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:24:10,062 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 00:24:10,062 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:24:10,063 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 00:24:10,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:24:10,143 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-28 00:24:10,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:24:10,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2019-11-28 00:24:10,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810781883] [2019-11-28 00:24:10,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-28 00:24:10,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:24:10,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-28 00:24:10,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-11-28 00:24:10,146 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 13 states. [2019-11-28 00:24:10,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:24:10,290 INFO L93 Difference]: Finished difference Result 50 states and 73 transitions. [2019-11-28 00:24:10,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 00:24:10,291 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2019-11-28 00:24:10,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:24:10,293 INFO L225 Difference]: With dead ends: 50 [2019-11-28 00:24:10,293 INFO L226 Difference]: Without dead ends: 28 [2019-11-28 00:24:10,294 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2019-11-28 00:24:10,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-28 00:24:10,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2019-11-28 00:24:10,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-28 00:24:10,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2019-11-28 00:24:10,303 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 37 [2019-11-28 00:24:10,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:24:10,303 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2019-11-28 00:24:10,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-28 00:24:10,304 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2019-11-28 00:24:10,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-28 00:24:10,305 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:24:10,306 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:24:10,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:24:10,519 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:24:10,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:24:10,520 INFO L82 PathProgramCache]: Analyzing trace with hash 2107265955, now seen corresponding path program 3 times [2019-11-28 00:24:10,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:24:10,521 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924015083] [2019-11-28 00:24:10,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:24:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:10,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:10,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:10,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:24:10,742 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-28 00:24:10,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924015083] [2019-11-28 00:24:10,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000363426] [2019-11-28 00:24:10,743 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:24:10,781 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-28 00:24:10,782 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:24:10,783 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-28 00:24:10,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:24:11,032 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-28 00:24:11,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:24:11,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2019-11-28 00:24:11,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601204793] [2019-11-28 00:24:11,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-28 00:24:11,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:24:11,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-28 00:24:11,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-11-28 00:24:11,035 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand 21 states. [2019-11-28 00:24:11,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:24:11,591 INFO L93 Difference]: Finished difference Result 39 states and 61 transitions. [2019-11-28 00:24:11,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-28 00:24:11,591 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 38 [2019-11-28 00:24:11,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:24:11,592 INFO L225 Difference]: With dead ends: 39 [2019-11-28 00:24:11,592 INFO L226 Difference]: Without dead ends: 0 [2019-11-28 00:24:11,594 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2019-11-28 00:24:11,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-28 00:24:11,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-28 00:24:11,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-28 00:24:11,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 00:24:11,595 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2019-11-28 00:24:11,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:24:11,596 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 00:24:11,596 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-28 00:24:11,596 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-28 00:24:11,596 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-28 00:24:11,796 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:24:11,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-28 00:24:11,940 INFO L246 CegarLoopResult]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2019-11-28 00:24:11,941 INFO L249 CegarLoopResult]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2019-11-28 00:24:11,941 INFO L242 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (< 1 fibonacci_~n) (= fibonacci_~n |fibonacci_#in~n|)) [2019-11-28 00:24:11,941 INFO L246 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2019-11-28 00:24:11,941 INFO L242 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse0 (= fibonacci_~n |fibonacci_#in~n|))) (or (and (<= 3 fibonacci_~n) .cse0 (<= fibonacci_~n (+ |fibonacci_#t~ret0| 2))) (and (< 1 fibonacci_~n) (<= fibonacci_~n (+ |fibonacci_#t~ret0| 1)) .cse0))) [2019-11-28 00:24:11,941 INFO L246 CegarLoopResult]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2019-11-28 00:24:11,941 INFO L246 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2019-11-28 00:24:11,942 INFO L246 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2019-11-28 00:24:11,947 INFO L246 CegarLoopResult]: For program point L15(lines 15 21) no Hoare annotation was computed. [2019-11-28 00:24:11,947 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-28 00:24:11,947 INFO L246 CegarLoopResult]: For program point L31(lines 31 35) no Hoare annotation was computed. [2019-11-28 00:24:11,947 INFO L249 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: true [2019-11-28 00:24:11,947 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-28 00:24:11,948 INFO L246 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2019-11-28 00:24:11,948 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-28 00:24:11,948 INFO L246 CegarLoopResult]: For program point L27(lines 27 29) no Hoare annotation was computed. [2019-11-28 00:24:11,948 INFO L249 CegarLoopResult]: At program point L25(lines 25 36) the Hoare annotation is: true [2019-11-28 00:24:11,948 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed. [2019-11-28 00:24:11,948 INFO L246 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2019-11-28 00:24:11,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 12:24:11 BoogieIcfgContainer [2019-11-28 00:24:11,960 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 00:24:11,961 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 00:24:11,961 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 00:24:11,961 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 00:24:11,962 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:24:07" (3/4) ... [2019-11-28 00:24:11,966 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-28 00:24:11,974 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2019-11-28 00:24:11,978 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-28 00:24:11,979 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-28 00:24:12,024 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 00:24:12,025 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 00:24:12,027 INFO L168 Benchmark]: Toolchain (without parser) took 5217.78 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 210.2 MB). Free memory was 956.3 MB in the beginning and 1.2 GB in the end (delta: -208.2 MB). Peak memory consumption was 2.0 MB. Max. memory is 11.5 GB. [2019-11-28 00:24:12,028 INFO L168 Benchmark]: CDTParser took 0.71 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 00:24:12,029 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.13 ms. Allocated memory is still 1.0 GB. Free memory was 956.3 MB in the beginning and 945.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 00:24:12,029 INFO L168 Benchmark]: Boogie Procedure Inliner took 104.00 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -188.0 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-28 00:24:12,030 INFO L168 Benchmark]: Boogie Preprocessor took 27.94 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-28 00:24:12,031 INFO L168 Benchmark]: RCFGBuilder took 258.53 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. [2019-11-28 00:24:12,032 INFO L168 Benchmark]: TraceAbstraction took 4441.61 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 72.9 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -50.7 MB). Peak memory consumption was 22.2 MB. Max. memory is 11.5 GB. [2019-11-28 00:24:12,032 INFO L168 Benchmark]: Witness Printer took 63.90 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 00:24:12,036 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.71 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 316.13 ms. Allocated memory is still 1.0 GB. Free memory was 956.3 MB in the beginning and 945.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 104.00 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -188.0 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 27.94 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 258.53 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4441.61 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 72.9 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -50.7 MB). Peak memory consumption was 22.2 MB. Max. memory is 11.5 GB. * Witness Printer took 63.90 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 34]: 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 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 19 locations, 1 error locations. Result: SAFE, OverallTime: 4.2s, OverallIterations: 5, TraceHistogramMax: 5, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 67 SDtfs, 88 SDslu, 255 SDs, 0 SdLazy, 623 SolverSat, 64 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 219 GetRequests, 140 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 32 PreInvPairs, 49 NumberOfFragments, 35 HoareAnnotationTreeSize, 32 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 42 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 254 NumberOfCodeBlocks, 246 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 245 ConstructedInterpolants, 0 QuantifiedInterpolants, 20372 SizeOfPredicates, 13 NumberOfNonLiveVariables, 270 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 175/244 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...