/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:15:12,731 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:15:12,735 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:15:12,764 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:15:12,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:15:12,766 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:15:12,767 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:15:12,769 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:15:12,771 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:15:12,773 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:15:12,774 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:15:12,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:15:12,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:15:12,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:15:12,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:15:12,783 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:15:12,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:15:12,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:15:12,790 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:15:12,795 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:15:12,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:15:12,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:15:12,803 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:15:12,805 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:15:12,809 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:15:12,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:15:12,827 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:15:12,829 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:15:12,830 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:15:12,891 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:15:12,892 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:15:12,894 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:15:12,895 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:15:12,895 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:15:12,895 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:15:12,895 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:15:12,896 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:15:12,896 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:15:12,896 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:15:12,897 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:15:12,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:15:12,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:15:12,898 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:15:12,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:15:12,899 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:15:12,899 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:15:12,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:15:12,899 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:15:12,900 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:15:12,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:15:12,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:15:12,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:15:12,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:15:12,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:15:12,901 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:15:12,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:15:12,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:15:12,902 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:15:12,902 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:15:13,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:15:13,452 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:15:13,457 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:15:13,459 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:15:13,459 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:15:13,461 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c [2020-09-04 13:15:13,548 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3087c7597/f2c5e12195bb482a86f39b75eb15fa61/FLAG264feefbd [2020-09-04 13:15:14,087 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:15:14,088 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c [2020-09-04 13:15:14,099 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3087c7597/f2c5e12195bb482a86f39b75eb15fa61/FLAG264feefbd [2020-09-04 13:15:14,428 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3087c7597/f2c5e12195bb482a86f39b75eb15fa61 [2020-09-04 13:15:14,440 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:15:14,442 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:15:14,444 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:15:14,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:15:14,448 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:15:14,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:15:14" (1/1) ... [2020-09-04 13:15:14,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b03ff29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:15:14, skipping insertion in model container [2020-09-04 13:15:14,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:15:14" (1/1) ... [2020-09-04 13:15:14,468 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:15:14,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:15:14,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:15:14,755 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:15:14,779 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:15:14,801 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:15:14,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:15:14 WrapperNode [2020-09-04 13:15:14,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:15:14,804 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:15:14,804 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:15:14,804 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:15:14,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:15:14" (1/1) ... [2020-09-04 13:15:14,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:15:14" (1/1) ... [2020-09-04 13:15:14,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:15:14" (1/1) ... [2020-09-04 13:15:14,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:15:14" (1/1) ... [2020-09-04 13:15:14,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:15:14" (1/1) ... [2020-09-04 13:15:14,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:15:14" (1/1) ... [2020-09-04 13:15:14,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:15:14" (1/1) ... [2020-09-04 13:15:14,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:15:14,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:15:14,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:15:14,969 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:15:14,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:15:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:15:15,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:15:15,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:15:15,063 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-09-04 13:15:15,063 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-09-04 13:15:15,063 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:15:15,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:15:15,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:15:15,064 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-09-04 13:15:15,064 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-09-04 13:15:15,065 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:15:15,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:15:15,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:15:15,332 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:15:15,332 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 13:15:15,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:15:15 BoogieIcfgContainer [2020-09-04 13:15:15,339 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:15:15,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:15:15,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:15:15,346 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:15:15,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:15:14" (1/3) ... [2020-09-04 13:15:15,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6baaca7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:15:15, skipping insertion in model container [2020-09-04 13:15:15,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:15:14" (2/3) ... [2020-09-04 13:15:15,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6baaca7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:15:15, skipping insertion in model container [2020-09-04 13:15:15,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:15:15" (3/3) ... [2020-09-04 13:15:15,352 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-1.c [2020-09-04 13:15:15,367 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:15:15,382 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:15:15,419 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:15:15,486 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:15:15,487 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:15:15,487 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:15:15,487 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:15:15,487 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:15:15,488 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:15:15,488 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:15:15,489 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:15:15,521 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-09-04 13:15:15,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-04 13:15:15,535 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:15:15,537 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:15:15,538 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:15:15,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:15:15,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-09-04 13:15:15,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:15:15,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773476589] [2020-09-04 13:15:15,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:15:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:15,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:15:15,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:15,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:15:15,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:15,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:15:15,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773476589] [2020-09-04 13:15:15,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:15:15,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:15:15,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587640112] [2020-09-04 13:15:15,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:15:15,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:15:15,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:15:15,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:15:15,864 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-09-04 13:15:16,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:15:16,008 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-09-04 13:15:16,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:15:16,011 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-04 13:15:16,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:15:16,025 INFO L225 Difference]: With dead ends: 44 [2020-09-04 13:15:16,025 INFO L226 Difference]: Without dead ends: 30 [2020-09-04 13:15:16,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:15:16,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-04 13:15:16,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-09-04 13:15:16,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-04 13:15:16,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-09-04 13:15:16,088 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-09-04 13:15:16,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:15:16,089 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-09-04 13:15:16,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:15:16,089 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-09-04 13:15:16,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-04 13:15:16,091 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:15:16,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:15:16,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:15:16,092 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:15:16,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:15:16,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-09-04 13:15:16,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:15:16,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348492489] [2020-09-04 13:15:16,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:15:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:16,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:15:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:16,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:15:16,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:15:16,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348492489] [2020-09-04 13:15:16,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:15:16,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 13:15:16,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228004394] [2020-09-04 13:15:16,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 13:15:16,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:15:16,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 13:15:16,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 13:15:16,197 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-09-04 13:15:16,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:15:16,290 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-09-04 13:15:16,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 13:15:16,292 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-04 13:15:16,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:15:16,294 INFO L225 Difference]: With dead ends: 36 [2020-09-04 13:15:16,294 INFO L226 Difference]: Without dead ends: 32 [2020-09-04 13:15:16,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:15:16,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-04 13:15:16,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-09-04 13:15:16,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-04 13:15:16,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-09-04 13:15:16,307 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-09-04 13:15:16,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:15:16,308 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-09-04 13:15:16,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 13:15:16,308 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-09-04 13:15:16,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-04 13:15:16,310 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:15:16,311 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:15:16,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 13:15:16,311 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:15:16,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:15:16,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-09-04 13:15:16,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:15:16,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289773321] [2020-09-04 13:15:16,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:15:16,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:16,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:15:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:16,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-04 13:15:16,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:16,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 13:15:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:16,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-04 13:15:16,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:16,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 13:15:16,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289773321] [2020-09-04 13:15:16,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700474571] [2020-09-04 13:15:16,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:15:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:15:16,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-04 13:15:16,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:15:16,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 13:15:16,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:15:16,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-09-04 13:15:16,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995614249] [2020-09-04 13:15:16,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 13:15:16,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:15:16,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 13:15:16,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:15:16,726 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-09-04 13:15:17,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:15:17,002 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-09-04 13:15:17,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 13:15:17,003 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-09-04 13:15:17,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:15:17,005 INFO L225 Difference]: With dead ends: 58 [2020-09-04 13:15:17,005 INFO L226 Difference]: Without dead ends: 34 [2020-09-04 13:15:17,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-09-04 13:15:17,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-04 13:15:17,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-09-04 13:15:17,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-04 13:15:17,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-09-04 13:15:17,017 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-09-04 13:15:17,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:15:17,018 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-09-04 13:15:17,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 13:15:17,018 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-09-04 13:15:17,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-04 13:15:17,020 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:15:17,020 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-04 13:15:17,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-09-04 13:15:17,236 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:15:17,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:15:17,237 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-09-04 13:15:17,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:15:17,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692161860] [2020-09-04 13:15:17,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:15:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:15:17,256 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:15:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:15:17,270 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:15:17,291 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-04 13:15:17,292 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 13:15:17,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 13:15:17,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:15:17 BoogieIcfgContainer [2020-09-04 13:15:17,331 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:15:17,335 INFO L168 Benchmark]: Toolchain (without parser) took 2891.16 ms. Allocated memory was 142.1 MB in the beginning and 223.9 MB in the end (delta: 81.8 MB). Free memory was 98.4 MB in the beginning and 185.5 MB in the end (delta: -87.1 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 13:15:17,336 INFO L168 Benchmark]: CDTParser took 0.61 ms. Allocated memory is still 142.1 MB. Free memory was 116.8 MB in the beginning and 116.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 13:15:17,337 INFO L168 Benchmark]: CACSL2BoogieTranslator took 359.40 ms. Allocated memory is still 142.1 MB. Free memory was 98.2 MB in the beginning and 88.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-04 13:15:17,338 INFO L168 Benchmark]: Boogie Preprocessor took 163.98 ms. Allocated memory was 142.1 MB in the beginning and 199.2 MB in the end (delta: 57.1 MB). Free memory was 88.6 MB in the beginning and 177.8 MB in the end (delta: -89.2 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-04 13:15:17,339 INFO L168 Benchmark]: RCFGBuilder took 371.03 ms. Allocated memory is still 199.2 MB. Free memory was 177.8 MB in the beginning and 164.4 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-09-04 13:15:17,340 INFO L168 Benchmark]: TraceAbstraction took 1990.13 ms. Allocated memory was 199.2 MB in the beginning and 223.9 MB in the end (delta: 24.6 MB). Free memory was 163.7 MB in the beginning and 185.5 MB in the end (delta: -21.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-09-04 13:15:17,344 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.61 ms. Allocated memory is still 142.1 MB. Free memory was 116.8 MB in the beginning and 116.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 359.40 ms. Allocated memory is still 142.1 MB. Free memory was 98.2 MB in the beginning and 88.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 163.98 ms. Allocated memory was 142.1 MB in the beginning and 199.2 MB in the end (delta: 57.1 MB). Free memory was 88.6 MB in the beginning and 177.8 MB in the end (delta: -89.2 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 371.03 ms. Allocated memory is still 199.2 MB. Free memory was 177.8 MB in the beginning and 164.4 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1990.13 ms. Allocated memory was 199.2 MB in the beginning and 223.9 MB in the end (delta: 24.6 MB). Free memory was 163.7 MB in the beginning and 185.5 MB in the end (delta: -21.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 2; VAL [x=2] [L37] CALL, EXPR fibo1(x) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) VAL [fibo1(x)=1, x=2] [L37] int result = fibo1(x); [L38] COND TRUE result == 1 VAL [result=1, x=2] [L39] __VERIFIER_error() VAL [result=1, x=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.8s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 82 SDtfs, 50 SDslu, 259 SDs, 0 SdLazy, 179 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 106 NumberOfCodeBlocks, 106 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 75 ConstructedInterpolants, 0 QuantifiedInterpolants, 2689 SizeOfPredicates, 3 NumberOfNonLiveVariables, 60 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 2/8 InterpolantCoveringCapability, 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 incorrect! Received shutdown request...