/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 13:14:28,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 13:14:28,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 13:14:28,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 13:14:28,126 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 13:14:28,127 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 13:14:28,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 13:14:28,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 13:14:28,132 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 13:14:28,133 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 13:14:28,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 13:14:28,135 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 13:14:28,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 13:14:28,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 13:14:28,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 13:14:28,138 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 13:14:28,139 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 13:14:28,140 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 13:14:28,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 13:14:28,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 13:14:28,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 13:14:28,146 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 13:14:28,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 13:14:28,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 13:14:28,150 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 13:14:28,153 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 13:14:28,153 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 13:14:28,154 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 13:14:28,155 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 13:14:28,156 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 13:14:28,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 13:14:28,157 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 13:14:28,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 13:14:28,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 13:14:28,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 13:14:28,159 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 13:14:28,159 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 13:14:28,168 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 13:14:28,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 13:14:28,170 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 13:14:28,170 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 13:14:28,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 13:14:28,170 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 13:14:28,171 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 13:14:28,171 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 13:14:28,171 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 13:14:28,171 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 13:14:28,171 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 13:14:28,171 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 13:14:28,172 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 13:14:28,172 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 13:14:28,172 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 13:14:28,172 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 13:14:28,172 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 13:14:28,173 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 13:14:28,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 13:14:28,173 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 13:14:28,173 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 13:14:28,173 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 13:14:28,174 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-17 13:14:28,446 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 13:14:28,457 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 13:14:28,461 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 13:14:28,462 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 13:14:28,463 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 13:14:28,463 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci02.c [2020-07-17 13:14:28,533 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfffdcdf7/87e91ba26d8d45c78bf301cb21ca6cc1/FLAGc07a55b63 [2020-07-17 13:14:29,007 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 13:14:29,008 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci02.c [2020-07-17 13:14:29,012 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfffdcdf7/87e91ba26d8d45c78bf301cb21ca6cc1/FLAGc07a55b63 [2020-07-17 13:14:29,435 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfffdcdf7/87e91ba26d8d45c78bf301cb21ca6cc1 [2020-07-17 13:14:29,447 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 13:14:29,452 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 13:14:29,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 13:14:29,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 13:14:29,459 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 13:14:29,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 01:14:29" (1/1) ... [2020-07-17 13:14:29,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d8183d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:29, skipping insertion in model container [2020-07-17 13:14:29,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 01:14:29" (1/1) ... [2020-07-17 13:14:29,473 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 13:14:29,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 13:14:29,697 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 13:14:29,701 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 13:14:29,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 13:14:29,726 INFO L208 MainTranslator]: Completed translation [2020-07-17 13:14:29,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:29 WrapperNode [2020-07-17 13:14:29,727 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 13:14:29,727 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 13:14:29,727 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 13:14:29,727 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 13:14:29,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:29" (1/1) ... [2020-07-17 13:14:29,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:29" (1/1) ... [2020-07-17 13:14:29,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:29" (1/1) ... [2020-07-17 13:14:29,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:29" (1/1) ... [2020-07-17 13:14:29,746 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:29" (1/1) ... [2020-07-17 13:14:29,749 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:29" (1/1) ... [2020-07-17 13:14:29,750 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:29" (1/1) ... [2020-07-17 13:14:29,751 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 13:14:29,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 13:14:29,752 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 13:14:29,752 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 13:14:29,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:29" (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 [2020-07-17 13:14:29,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 13:14:29,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 13:14:29,893 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-07-17 13:14:29,893 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 13:14:29,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 13:14:29,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 13:14:29,894 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-07-17 13:14:29,894 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 13:14:29,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 13:14:29,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 13:14:30,074 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 13:14:30,074 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 13:14:30,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 01:14:30 BoogieIcfgContainer [2020-07-17 13:14:30,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 13:14:30,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 13:14:30,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 13:14:30,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 13:14:30,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 01:14:29" (1/3) ... [2020-07-17 13:14:30,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4364f3fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 01:14:30, skipping insertion in model container [2020-07-17 13:14:30,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:29" (2/3) ... [2020-07-17 13:14:30,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4364f3fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 01:14:30, skipping insertion in model container [2020-07-17 13:14:30,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 01:14:30" (3/3) ... [2020-07-17 13:14:30,087 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci02.c [2020-07-17 13:14:30,097 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 13:14:30,104 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 13:14:30,117 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 13:14:30,137 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 13:14:30,137 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 13:14:30,137 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-17 13:14:30,137 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 13:14:30,138 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 13:14:30,138 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 13:14:30,138 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 13:14:30,138 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 13:14:30,151 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-07-17 13:14:30,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-17 13:14:30,160 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 13:14:30,161 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 13:14:30,161 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 13:14:30,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 13:14:30,167 INFO L82 PathProgramCache]: Analyzing trace with hash 2085313281, now seen corresponding path program 1 times [2020-07-17 13:14:30,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 13:14:30,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195588762] [2020-07-17 13:14:30,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 13:14:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:30,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:30,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 13:14:30,542 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 13:14:30,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195588762] [2020-07-17 13:14:30,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 13:14:30,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-17 13:14:30,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315167174] [2020-07-17 13:14:30,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 13:14:30,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 13:14:30,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 13:14:30,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-17 13:14:30,570 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 9 states. [2020-07-17 13:14:30,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 13:14:30,702 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-07-17 13:14:30,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 13:14:30,705 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-07-17 13:14:30,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 13:14:30,714 INFO L225 Difference]: With dead ends: 44 [2020-07-17 13:14:30,715 INFO L226 Difference]: Without dead ends: 28 [2020-07-17 13:14:30,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-17 13:14:30,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-17 13:14:30,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-17 13:14:30,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-17 13:14:30,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-07-17 13:14:30,765 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2020-07-17 13:14:30,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 13:14:30,766 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-07-17 13:14:30,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 13:14:30,766 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-07-17 13:14:30,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-17 13:14:30,768 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 13:14:30,768 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 13:14:30,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 13:14:30,769 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 13:14:30,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 13:14:30,770 INFO L82 PathProgramCache]: Analyzing trace with hash -93144392, now seen corresponding path program 1 times [2020-07-17 13:14:30,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 13:14:30,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226751523] [2020-07-17 13:14:30,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 13:14:30,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:30,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 13:14:30,921 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 13:14:30,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226751523] [2020-07-17 13:14:30,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 13:14:30,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-17 13:14:30,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391319736] [2020-07-17 13:14:30,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 13:14:30,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 13:14:30,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 13:14:30,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-17 13:14:30,925 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 9 states. [2020-07-17 13:14:30,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 13:14:30,988 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-07-17 13:14:30,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 13:14:30,989 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-07-17 13:14:30,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 13:14:30,990 INFO L225 Difference]: With dead ends: 36 [2020-07-17 13:14:30,991 INFO L226 Difference]: Without dead ends: 30 [2020-07-17 13:14:30,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-07-17 13:14:30,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-17 13:14:31,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-07-17 13:14:31,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-17 13:14:31,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-07-17 13:14:31,004 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 17 [2020-07-17 13:14:31,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 13:14:31,005 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-07-17 13:14:31,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 13:14:31,005 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-07-17 13:14:31,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-17 13:14:31,007 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 13:14:31,007 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 13:14:31,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 13:14:31,008 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 13:14:31,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 13:14:31,009 INFO L82 PathProgramCache]: Analyzing trace with hash 37359445, now seen corresponding path program 1 times [2020-07-17 13:14:31,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 13:14:31,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848556882] [2020-07-17 13:14:31,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 13:14:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:31,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:31,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:31,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:31,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-17 13:14:31,399 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 13:14:31,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848556882] [2020-07-17 13:14:31,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 13:14:31,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-17 13:14:31,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323934800] [2020-07-17 13:14:31,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-17 13:14:31,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 13:14:31,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-17 13:14:31,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-07-17 13:14:31,402 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 15 states. [2020-07-17 13:14:31,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 13:14:31,689 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-07-17 13:14:31,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-17 13:14:31,689 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-07-17 13:14:31,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 13:14:31,690 INFO L225 Difference]: With dead ends: 51 [2020-07-17 13:14:31,690 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 13:14:31,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-07-17 13:14:31,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 13:14:31,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 13:14:31,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 13:14:31,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 13:14:31,693 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2020-07-17 13:14:31,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 13:14:31,694 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 13:14:31,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-17 13:14:31,694 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 13:14:31,694 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 13:14:31,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 13:14:31,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 13:14:31,993 INFO L264 CegarLoopResult]: At program point fibonacciFINAL(lines 14 22) the Hoare annotation is: (= fibonacci_~n |fibonacci_#in~n|) [2020-07-17 13:14:31,993 INFO L271 CegarLoopResult]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2020-07-17 13:14:31,994 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (< 1 fibonacci_~n) (= fibonacci_~n |fibonacci_#in~n|)) [2020-07-17 13:14:31,994 INFO L264 CegarLoopResult]: At program point L20-1(line 20) the Hoare annotation is: (and (< 1 fibonacci_~n) (= fibonacci_~n |fibonacci_#in~n|)) [2020-07-17 13:14:31,994 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (and (<= |fibonacci_#in~n| 1) (< 0 fibonacci_~n) (= fibonacci_~n |fibonacci_#in~n|)) [2020-07-17 13:14:31,994 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (and (< 1 fibonacci_~n) (= fibonacci_~n |fibonacci_#in~n|)) [2020-07-17 13:14:31,995 INFO L264 CegarLoopResult]: At program point fibonacciEXIT(lines 14 22) the Hoare annotation is: (= fibonacci_~n |fibonacci_#in~n|) [2020-07-17 13:14:31,995 INFO L264 CegarLoopResult]: At program point L17(lines 17 21) the Hoare annotation is: (and (< 0 fibonacci_~n) (= fibonacci_~n |fibonacci_#in~n|)) [2020-07-17 13:14:31,995 INFO L264 CegarLoopResult]: At program point L20-3(line 20) the Hoare annotation is: (and (< 1 fibonacci_~n) (= fibonacci_~n |fibonacci_#in~n|)) [2020-07-17 13:14:31,995 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (and (<= |fibonacci_#in~n| 0) (= fibonacci_~n |fibonacci_#in~n|)) [2020-07-17 13:14:31,996 INFO L264 CegarLoopResult]: At program point L20-4(line 20) the Hoare annotation is: (and (< 1 fibonacci_~n) (<= |fibonacci_#t~ret1| 2147483647) (<= 0 (+ |fibonacci_#t~ret1| 2147483648)) (= fibonacci_~n |fibonacci_#in~n|)) [2020-07-17 13:14:31,996 INFO L264 CegarLoopResult]: At program point L15(lines 15 21) the Hoare annotation is: (= fibonacci_~n |fibonacci_#in~n|) [2020-07-17 13:14:31,996 INFO L264 CegarLoopResult]: At program point L20-5(line 20) the Hoare annotation is: (and (< 1 fibonacci_~n) (<= |fibonacci_#t~ret1| 2147483647) (= |fibonacci_#res| (+ |fibonacci_#t~ret1| |fibonacci_#t~ret0|)) (<= 0 (+ |fibonacci_#t~ret1| 2147483648)) (= fibonacci_~n |fibonacci_#in~n|)) [2020-07-17 13:14:31,996 INFO L264 CegarLoopResult]: At program point L20-6(line 20) the Hoare annotation is: (and (<= |fibonacci_#t~ret0| (+ |fibonacci_#res| 2147483648)) (< 1 fibonacci_~n) (= fibonacci_~n |fibonacci_#in~n|) (<= |fibonacci_#res| (+ |fibonacci_#t~ret0| 2147483647))) [2020-07-17 13:14:31,996 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-17 13:14:31,997 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-07-17 13:14:31,997 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-07-17 13:14:31,997 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-17 13:14:31,997 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-17 13:14:31,997 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-07-17 13:14:31,998 INFO L264 CegarLoopResult]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 31) the Hoare annotation is: false [2020-07-17 13:14:31,998 INFO L264 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (and (<= 0 (+ main_~result~0 2147483648)) (not (= 34 main_~result~0)) (<= main_~result~0 2147483647) (<= 9 main_~x~0)) [2020-07-17 13:14:31,998 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 33) the Hoare annotation is: true [2020-07-17 13:14:31,998 INFO L264 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: (<= 9 main_~x~0) [2020-07-17 13:14:31,999 INFO L264 CegarLoopResult]: At program point L28(lines 28 32) the Hoare annotation is: (and (<= 0 (+ main_~result~0 2147483648)) (<= main_~result~0 2147483647) (<= 9 main_~x~0)) [2020-07-17 13:14:31,999 INFO L264 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (<= 9 main_~x~0) [2020-07-17 13:14:31,999 INFO L264 CegarLoopResult]: At program point L27-1(line 27) the Hoare annotation is: (<= 9 main_~x~0) [2020-07-17 13:14:31,999 INFO L264 CegarLoopResult]: At program point L27-2(line 27) the Hoare annotation is: (and (<= 0 (+ |main_#t~ret2| 2147483648)) (<= |main_#t~ret2| 2147483647) (<= 9 main_~x~0)) [2020-07-17 13:14:31,999 INFO L264 CegarLoopResult]: At program point mainEXIT(lines 25 33) the Hoare annotation is: (<= 9 main_~x~0) [2020-07-17 13:14:32,000 INFO L264 CegarLoopResult]: At program point L27-3(line 27) the Hoare annotation is: (and (<= |main_#t~ret2| 2147483647) (= |main_#t~ret2| main_~result~0) (<= 9 main_~x~0) (<= 0 (+ |main_#t~ret2| 2147483648))) [2020-07-17 13:14:32,000 INFO L264 CegarLoopResult]: At program point mainFINAL(lines 25 33) the Hoare annotation is: (<= 9 main_~x~0) [2020-07-17 13:14:32,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 01:14:32 BoogieIcfgContainer [2020-07-17 13:14:32,020 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 13:14:32,023 INFO L168 Benchmark]: Toolchain (without parser) took 2571.53 ms. Allocated memory was 145.2 MB in the beginning and 234.9 MB in the end (delta: 89.7 MB). Free memory was 103.5 MB in the beginning and 116.8 MB in the end (delta: -13.4 MB). Peak memory consumption was 76.3 MB. Max. memory is 7.1 GB. [2020-07-17 13:14:32,023 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 145.2 MB. Free memory is still 121.5 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-17 13:14:32,024 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.70 ms. Allocated memory is still 145.2 MB. Free memory was 103.0 MB in the beginning and 93.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-17 13:14:32,025 INFO L168 Benchmark]: Boogie Preprocessor took 24.27 ms. Allocated memory is still 145.2 MB. Free memory was 93.7 MB in the beginning and 92.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-17 13:14:32,026 INFO L168 Benchmark]: RCFGBuilder took 326.56 ms. Allocated memory was 145.2 MB in the beginning and 201.3 MB in the end (delta: 56.1 MB). Free memory was 92.0 MB in the beginning and 168.2 MB in the end (delta: -76.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-17 13:14:32,027 INFO L168 Benchmark]: TraceAbstraction took 1940.73 ms. Allocated memory was 201.3 MB in the beginning and 234.9 MB in the end (delta: 33.6 MB). Free memory was 168.2 MB in the beginning and 116.8 MB in the end (delta: 51.4 MB). Peak memory consumption was 85.0 MB. Max. memory is 7.1 GB. [2020-07-17 13:14:32,031 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 145.2 MB. Free memory is still 121.5 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 272.70 ms. Allocated memory is still 145.2 MB. Free memory was 103.0 MB in the beginning and 93.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.27 ms. Allocated memory is still 145.2 MB. Free memory was 93.7 MB in the beginning and 92.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 326.56 ms. Allocated memory was 145.2 MB in the beginning and 201.3 MB in the end (delta: 56.1 MB). Free memory was 92.0 MB in the beginning and 168.2 MB in the end (delta: -76.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1940.73 ms. Allocated memory was 201.3 MB in the beginning and 234.9 MB in the end (delta: 33.6 MB). Free memory was 168.2 MB in the beginning and 116.8 MB in the end (delta: 51.4 MB). Peak memory consumption was 85.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 31]: 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 - ProcedureContractResult [Line: 14]: Procedure Contract for fibonacci Derived contract for procedure fibonacci: n == \old(n) - ProcedureContractResult [Line: 25]: Procedure Contract for main Derived contract for procedure main: 9 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.5s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 69 SDtfs, 74 SDslu, 246 SDs, 0 SdLazy, 215 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, 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, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 31 LocationsWithAnnotation, 87 PreInvPairs, 141 NumberOfFragments, 192 HoareAnnotationTreeSize, 87 FomulaSimplifications, 262 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 31 FomulaSimplificationsInter, 99 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...