/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-simple/fibo_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 13:14:47,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 13:14:47,517 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 13:14:47,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 13:14:47,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 13:14:47,531 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 13:14:47,532 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 13:14:47,534 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 13:14:47,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 13:14:47,539 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 13:14:47,543 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 13:14:47,545 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 13:14:47,545 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 13:14:47,546 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 13:14:47,548 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 13:14:47,549 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 13:14:47,551 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 13:14:47,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 13:14:47,556 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 13:14:47,558 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 13:14:47,563 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 13:14:47,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 13:14:47,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 13:14:47,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 13:14:47,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 13:14:47,574 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 13:14:47,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 13:14:47,578 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 13:14:47,579 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 13:14:47,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-17 13:14:47,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 13:14:47,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 13:14:47,591 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 13:14:47,591 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 13:14:47,619 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 13:14:47,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 13:14:47,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 13:14:47,625 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 13:14:47,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 13:14:47,625 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 13:14:47,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 13:14:47,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 13:14:47,626 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 13:14:47,626 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 13:14:47,626 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 13:14:47,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 13:14:47,626 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 13:14:47,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 13:14:47,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 13:14:47,627 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 13:14:47,627 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 13:14:47,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 13:14:47,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 13:14:47,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 13:14:47,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 13:14:47,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 13:14:47,630 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-17 13:14:47,895 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 13:14:47,908 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 13:14:47,911 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 13:14:47,913 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 13:14:47,913 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 13:14:47,914 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2020-07-17 13:14:47,987 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac5b08c77/2d2fb847f67d4cc196c5779d2ca69887/FLAGb07195f08 [2020-07-17 13:14:48,519 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 13:14:48,519 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2020-07-17 13:14:48,524 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac5b08c77/2d2fb847f67d4cc196c5779d2ca69887/FLAGb07195f08 [2020-07-17 13:14:48,853 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac5b08c77/2d2fb847f67d4cc196c5779d2ca69887 [2020-07-17 13:14:48,863 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 13:14:48,866 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 13:14:48,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 13:14:48,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 13:14:48,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 13:14:48,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 01:14:48" (1/1) ... [2020-07-17 13:14:48,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6aaa6b90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:48, skipping insertion in model container [2020-07-17 13:14:48,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 01:14:48" (1/1) ... [2020-07-17 13:14:48,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 13:14:48,904 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 13:14:49,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 13:14:49,076 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 13:14:49,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 13:14:49,108 INFO L208 MainTranslator]: Completed translation [2020-07-17 13:14:49,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:49 WrapperNode [2020-07-17 13:14:49,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 13:14:49,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 13:14:49,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 13:14:49,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 13:14:49,122 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:49" (1/1) ... [2020-07-17 13:14:49,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:49" (1/1) ... [2020-07-17 13:14:49,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:49" (1/1) ... [2020-07-17 13:14:49,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:49" (1/1) ... [2020-07-17 13:14:49,130 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:49" (1/1) ... [2020-07-17 13:14:49,133 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:49" (1/1) ... [2020-07-17 13:14:49,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:49" (1/1) ... [2020-07-17 13:14:49,135 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 13:14:49,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 13:14:49,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 13:14:49,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 13:14:49,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:49" (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 13:14:49,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 13:14:49,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 13:14:49,291 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-17 13:14:49,291 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 13:14:49,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 13:14:49,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 13:14:49,292 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-17 13:14:49,292 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 13:14:49,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 13:14:49,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 13:14:49,475 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 13:14:49,475 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 13:14:49,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 01:14:49 BoogieIcfgContainer [2020-07-17 13:14:49,480 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 13:14:49,481 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 13:14:49,481 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 13:14:49,484 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 13:14:49,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 01:14:48" (1/3) ... [2020-07-17 13:14:49,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c05d43f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 01:14:49, skipping insertion in model container [2020-07-17 13:14:49,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:49" (2/3) ... [2020-07-17 13:14:49,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c05d43f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 01:14:49, skipping insertion in model container [2020-07-17 13:14:49,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 01:14:49" (3/3) ... [2020-07-17 13:14:49,488 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_5-1.c [2020-07-17 13:14:49,496 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 13:14:49,502 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 13:14:49,516 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 13:14:49,539 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 13:14:49,540 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 13:14:49,540 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-17 13:14:49,540 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 13:14:49,540 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 13:14:49,540 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 13:14:49,541 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 13:14:49,541 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 13:14:49,556 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-07-17 13:14:49,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-17 13:14:49,566 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 13:14:49,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 13:14:49,568 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 13:14:49,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 13:14:49,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1756383024, now seen corresponding path program 1 times [2020-07-17 13:14:49,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 13:14:49,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209821920] [2020-07-17 13:14:49,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 13:14:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:49,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:49,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:49,898 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 13:14:50,008 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 13:14:50,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209821920] [2020-07-17 13:14:50,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 13:14:50,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-17 13:14:50,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616211682] [2020-07-17 13:14:50,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 13:14:50,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 13:14:50,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 13:14:50,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-17 13:14:50,039 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 9 states. [2020-07-17 13:14:50,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 13:14:50,166 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-07-17 13:14:50,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 13:14:50,168 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-07-17 13:14:50,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 13:14:50,180 INFO L225 Difference]: With dead ends: 44 [2020-07-17 13:14:50,181 INFO L226 Difference]: Without dead ends: 28 [2020-07-17 13:14:50,185 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 13:14:50,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-17 13:14:50,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-17 13:14:50,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-17 13:14:50,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-07-17 13:14:50,247 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2020-07-17 13:14:50,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 13:14:50,247 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-07-17 13:14:50,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 13:14:50,248 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-07-17 13:14:50,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-17 13:14:50,250 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 13:14:50,251 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 13:14:50,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 13:14:50,252 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 13:14:50,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 13:14:50,252 INFO L82 PathProgramCache]: Analyzing trace with hash -389703589, now seen corresponding path program 1 times [2020-07-17 13:14:50,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 13:14:50,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57232407] [2020-07-17 13:14:50,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 13:14:50,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:50,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:50,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:50,329 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 13:14:50,405 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 13:14:50,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57232407] [2020-07-17 13:14:50,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 13:14:50,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-17 13:14:50,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335236665] [2020-07-17 13:14:50,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 13:14:50,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 13:14:50,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 13:14:50,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-17 13:14:50,409 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 9 states. [2020-07-17 13:14:50,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 13:14:50,471 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-07-17 13:14:50,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 13:14:50,472 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-07-17 13:14:50,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 13:14:50,474 INFO L225 Difference]: With dead ends: 36 [2020-07-17 13:14:50,474 INFO L226 Difference]: Without dead ends: 30 [2020-07-17 13:14:50,476 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 13:14:50,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-17 13:14:50,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-07-17 13:14:50,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-17 13:14:50,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-07-17 13:14:50,488 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 17 [2020-07-17 13:14:50,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 13:14:50,489 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-07-17 13:14:50,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 13:14:50,489 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-07-17 13:14:50,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-17 13:14:50,491 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 13:14:50,491 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 13:14:50,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 13:14:50,492 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 13:14:50,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 13:14:50,492 INFO L82 PathProgramCache]: Analyzing trace with hash 50309368, now seen corresponding path program 1 times [2020-07-17 13:14:50,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 13:14:50,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234996252] [2020-07-17 13:14:50,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 13:14:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:50,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:50,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:50,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:50,682 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 13:14:50,878 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 13:14:50,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234996252] [2020-07-17 13:14:50,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 13:14:50,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-17 13:14:50,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941641701] [2020-07-17 13:14:50,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-17 13:14:50,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 13:14:50,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-17 13:14:50,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-07-17 13:14:50,881 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 15 states. [2020-07-17 13:14:51,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 13:14:51,166 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2020-07-17 13:14:51,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-17 13:14:51,166 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2020-07-17 13:14:51,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 13:14:51,167 INFO L225 Difference]: With dead ends: 51 [2020-07-17 13:14:51,167 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 13:14:51,169 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 13:14:51,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 13:14:51,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 13:14:51,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 13:14:51,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 13:14:51,170 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2020-07-17 13:14:51,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 13:14:51,170 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 13:14:51,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-17 13:14:51,171 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 13:14:51,171 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 13:14:51,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 13:14:51,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 13:14:51,478 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-17 13:14:51,478 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-07-17 13:14:51,479 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-07-17 13:14:51,479 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-17 13:14:51,479 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-17 13:14:51,479 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-07-17 13:14:51,479 INFO L264 CegarLoopResult]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27) the Hoare annotation is: false [2020-07-17 13:14:51,480 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 23 30) the Hoare annotation is: true [2020-07-17 13:14:51,480 INFO L264 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (and (<= 0 (+ main_~result~0 2147483648)) (<= main_~result~0 2147483647) (<= 5 main_~x~0) (not (= 5 main_~result~0))) [2020-07-17 13:14:51,480 INFO L264 CegarLoopResult]: At program point L26(lines 26 28) the Hoare annotation is: (and (<= main_~result~0 2147483647) (<= 5 main_~x~0) (<= 0 (+ main_~result~0 2147483648))) [2020-07-17 13:14:51,480 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (<= 5 main_~x~0) [2020-07-17 13:14:51,481 INFO L264 CegarLoopResult]: At program point mainEXIT(lines 23 30) the Hoare annotation is: (<= 5 main_~x~0) [2020-07-17 13:14:51,481 INFO L264 CegarLoopResult]: At program point L25-1(line 25) the Hoare annotation is: (<= 5 main_~x~0) [2020-07-17 13:14:51,481 INFO L264 CegarLoopResult]: At program point L26-2(lines 26 28) the Hoare annotation is: (<= 5 main_~x~0) [2020-07-17 13:14:51,481 INFO L264 CegarLoopResult]: At program point L25-2(line 25) the Hoare annotation is: (and (<= 0 (+ |main_#t~ret2| 2147483648)) (<= |main_#t~ret2| 2147483647) (<= 5 main_~x~0)) [2020-07-17 13:14:51,481 INFO L264 CegarLoopResult]: At program point L25-3(line 25) the Hoare annotation is: (and (<= |main_#t~ret2| 2147483647) (<= 5 main_~x~0) (= |main_#t~ret2| main_~result~0) (<= 0 (+ |main_#t~ret2| 2147483648))) [2020-07-17 13:14:51,482 INFO L264 CegarLoopResult]: At program point mainFINAL(lines 23 30) the Hoare annotation is: (<= 5 main_~x~0) [2020-07-17 13:14:51,482 INFO L264 CegarLoopResult]: At program point fiboEXIT(lines 5 13) the Hoare annotation is: (= fibo_~n |fibo_#in~n|) [2020-07-17 13:14:51,482 INFO L264 CegarLoopResult]: At program point fiboFINAL(lines 5 13) the Hoare annotation is: (= fibo_~n |fibo_#in~n|) [2020-07-17 13:14:51,482 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (= fibo_~n |fibo_#in~n|) (< 1 fibo_~n)) [2020-07-17 13:14:51,483 INFO L264 CegarLoopResult]: At program point L11-1(line 11) the Hoare annotation is: (and (= fibo_~n |fibo_#in~n|) (< 1 fibo_~n)) [2020-07-17 13:14:51,483 INFO L264 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: (and (< 0 fibo_~n) (= fibo_~n |fibo_#in~n|) (<= |fibo_#in~n| 1)) [2020-07-17 13:14:51,483 INFO L264 CegarLoopResult]: At program point L11-2(line 11) the Hoare annotation is: (and (= fibo_~n |fibo_#in~n|) (< 1 fibo_~n)) [2020-07-17 13:14:51,483 INFO L264 CegarLoopResult]: At program point L8(lines 8 12) the Hoare annotation is: (and (< 0 fibo_~n) (= fibo_~n |fibo_#in~n|)) [2020-07-17 13:14:51,484 INFO L264 CegarLoopResult]: At program point L11-3(line 11) the Hoare annotation is: (and (= fibo_~n |fibo_#in~n|) (< 1 fibo_~n)) [2020-07-17 13:14:51,484 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= fibo_~n |fibo_#in~n|) (<= |fibo_#in~n| 0)) [2020-07-17 13:14:51,484 INFO L264 CegarLoopResult]: At program point L11-4(line 11) the Hoare annotation is: (and (= fibo_~n |fibo_#in~n|) (< 1 fibo_~n) (<= |fibo_#t~ret1| 2147483647) (<= 0 (+ |fibo_#t~ret1| 2147483648))) [2020-07-17 13:14:51,484 INFO L264 CegarLoopResult]: At program point L6(lines 6 12) the Hoare annotation is: (= fibo_~n |fibo_#in~n|) [2020-07-17 13:14:51,484 INFO L264 CegarLoopResult]: At program point L11-5(line 11) the Hoare annotation is: (and (<= 0 (+ |fibo_#t~ret1| 2147483648)) (= fibo_~n |fibo_#in~n|) (< 1 fibo_~n) (<= |fibo_#t~ret1| 2147483647) (= |fibo_#res| (+ |fibo_#t~ret0| |fibo_#t~ret1|))) [2020-07-17 13:14:51,485 INFO L271 CegarLoopResult]: At program point fiboENTRY(lines 5 13) the Hoare annotation is: true [2020-07-17 13:14:51,485 INFO L264 CegarLoopResult]: At program point L11-6(line 11) the Hoare annotation is: (and (= fibo_~n |fibo_#in~n|) (< 1 fibo_~n) (<= |fibo_#t~ret0| (+ |fibo_#res| 2147483648)) (<= |fibo_#res| (+ |fibo_#t~ret0| 2147483647))) [2020-07-17 13:14:51,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 01:14:51 BoogieIcfgContainer [2020-07-17 13:14:51,503 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 13:14:51,507 INFO L168 Benchmark]: Toolchain (without parser) took 2641.15 ms. Allocated memory was 137.4 MB in the beginning and 233.8 MB in the end (delta: 96.5 MB). Free memory was 103.1 MB in the beginning and 119.2 MB in the end (delta: -16.1 MB). Peak memory consumption was 80.3 MB. Max. memory is 7.1 GB. [2020-07-17 13:14:51,508 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 137.4 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 13:14:51,509 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.79 ms. Allocated memory is still 137.4 MB. Free memory was 102.6 MB in the beginning and 93.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-17 13:14:51,510 INFO L168 Benchmark]: Boogie Preprocessor took 25.76 ms. Allocated memory is still 137.4 MB. Free memory was 93.4 MB in the beginning and 92.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-17 13:14:51,511 INFO L168 Benchmark]: RCFGBuilder took 344.23 ms. Allocated memory was 137.4 MB in the beginning and 202.4 MB in the end (delta: 65.0 MB). Free memory was 92.0 MB in the beginning and 170.0 MB in the end (delta: -78.0 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. [2020-07-17 13:14:51,512 INFO L168 Benchmark]: TraceAbstraction took 2022.75 ms. Allocated memory was 202.4 MB in the beginning and 233.8 MB in the end (delta: 31.5 MB). Free memory was 170.0 MB in the beginning and 119.2 MB in the end (delta: 50.8 MB). Peak memory consumption was 82.2 MB. Max. memory is 7.1 GB. [2020-07-17 13:14:51,516 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 137.4 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 241.79 ms. Allocated memory is still 137.4 MB. Free memory was 102.6 MB in the beginning and 93.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.76 ms. Allocated memory is still 137.4 MB. Free memory was 93.4 MB in the beginning and 92.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 344.23 ms. Allocated memory was 137.4 MB in the beginning and 202.4 MB in the end (delta: 65.0 MB). Free memory was 92.0 MB in the beginning and 170.0 MB in the end (delta: -78.0 MB). Peak memory consumption was 14.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2022.75 ms. Allocated memory was 202.4 MB in the beginning and 233.8 MB in the end (delta: 31.5 MB). Free memory was 170.0 MB in the beginning and 119.2 MB in the end (delta: 50.8 MB). Peak memory consumption was 82.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 27]: 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: 23]: Procedure Contract for main Derived contract for procedure main: 5 <= x - ProcedureContractResult [Line: 5]: Procedure Contract for fibo Derived contract for procedure fibo: n == \old(n) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.6s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 69 SDtfs, 74 SDslu, 246 SDs, 0 SdLazy, 215 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.7s 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...