/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST -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 0.1.25-5644d1e-m [2020-08-18 12:07:13,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 12:07:13,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 12:07:13,160 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 12:07:13,161 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 12:07:13,162 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 12:07:13,165 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 12:07:13,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 12:07:13,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 12:07:13,180 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 12:07:13,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 12:07:13,183 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 12:07:13,184 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 12:07:13,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 12:07:13,188 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 12:07:13,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 12:07:13,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 12:07:13,194 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 12:07:13,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 12:07:13,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 12:07:13,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 12:07:13,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 12:07:13,207 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 12:07:13,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 12:07:13,215 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 12:07:13,227 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 12:07:13,228 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 12:07:13,230 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 12:07:13,231 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 [2020-08-18 12:07:13,275 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 12:07:13,275 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 12:07:13,277 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 12:07:13,278 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 12:07:13,278 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 12:07:13,279 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 12:07:13,279 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 12:07:13,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 12:07:13,279 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 12:07:13,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 12:07:13,281 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 12:07:13,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 12:07:13,281 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 12:07:13,282 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 12:07:13,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 12:07:13,282 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 12:07:13,282 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 12:07:13,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 12:07:13,283 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 12:07:13,283 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 12:07:13,283 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 12:07:13,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 12:07:13,283 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 12:07:13,284 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 12:07:13,284 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 12:07:13,284 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 12:07:13,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 12:07:13,284 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 12:07:13,284 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 12:07:13,285 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 12:07:13,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 12:07:13,600 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 12:07:13,606 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 12:07:13,608 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 12:07:13,608 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 12:07:13,609 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c [2020-08-18 12:07:13,675 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3cd4c6eeb/01ce928bc82740a88613aa6740ef89f8/FLAGaea75d4c6 [2020-08-18 12:07:14,167 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 12:07:14,170 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_2-1.c [2020-08-18 12:07:14,180 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3cd4c6eeb/01ce928bc82740a88613aa6740ef89f8/FLAGaea75d4c6 [2020-08-18 12:07:14,541 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3cd4c6eeb/01ce928bc82740a88613aa6740ef89f8 [2020-08-18 12:07:14,549 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 12:07:14,551 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 12:07:14,552 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 12:07:14,552 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 12:07:14,555 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 12:07:14,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:07:14" (1/1) ... [2020-08-18 12:07:14,559 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@682ba3bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:07:14, skipping insertion in model container [2020-08-18 12:07:14,560 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 12:07:14" (1/1) ... [2020-08-18 12:07:14,567 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 12:07:14,586 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 12:07:14,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:07:14,771 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 12:07:14,788 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 12:07:14,800 INFO L208 MainTranslator]: Completed translation [2020-08-18 12:07:14,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:07:14 WrapperNode [2020-08-18 12:07:14,800 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 12:07:14,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 12:07:14,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 12:07:14,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 12:07:14,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:07:14" (1/1) ... [2020-08-18 12:07:14,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:07:14" (1/1) ... [2020-08-18 12:07:14,907 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:07:14" (1/1) ... [2020-08-18 12:07:14,907 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:07:14" (1/1) ... [2020-08-18 12:07:14,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:07:14" (1/1) ... [2020-08-18 12:07:14,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:07:14" (1/1) ... [2020-08-18 12:07:14,915 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:07:14" (1/1) ... [2020-08-18 12:07:14,917 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 12:07:14,918 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 12:07:14,918 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 12:07:14,918 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 12:07:14,919 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:07:14" (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 [2020-08-18 12:07:14,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 12:07:14,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 12:07:14,975 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-18 12:07:14,975 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-18 12:07:14,975 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 12:07:14,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 12:07:14,975 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 12:07:14,976 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-18 12:07:14,976 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-18 12:07:14,976 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 12:07:14,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 12:07:14,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 12:07:15,179 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 12:07:15,180 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 12:07:15,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:07:15 BoogieIcfgContainer [2020-08-18 12:07:15,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 12:07:15,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 12:07:15,186 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 12:07:15,190 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 12:07:15,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 12:07:14" (1/3) ... [2020-08-18 12:07:15,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10df5318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:07:15, skipping insertion in model container [2020-08-18 12:07:15,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 12:07:14" (2/3) ... [2020-08-18 12:07:15,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10df5318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 12:07:15, skipping insertion in model container [2020-08-18 12:07:15,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 12:07:15" (3/3) ... [2020-08-18 12:07:15,194 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_2-1.c [2020-08-18 12:07:15,204 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 12:07:15,212 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 12:07:15,228 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 12:07:15,261 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 12:07:15,262 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 12:07:15,262 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 12:07:15,263 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 12:07:15,263 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 12:07:15,263 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 12:07:15,263 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 12:07:15,264 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 12:07:15,288 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-18 12:07:15,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 12:07:15,296 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:07:15,297 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:07:15,301 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:07:15,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:07:15,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-08-18 12:07:15,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:07:15,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856454552] [2020-08-18 12:07:15,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:07:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:15,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:07:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:15,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 12:07:15,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:15,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:07:15,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856454552] [2020-08-18 12:07:15,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:07:15,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 12:07:15,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903685301] [2020-08-18 12:07:15,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 12:07:15,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:07:15,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 12:07:15,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:07:15,631 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-08-18 12:07:15,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:07:15,747 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-08-18 12:07:15,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 12:07:15,749 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 12:07:15,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:07:15,761 INFO L225 Difference]: With dead ends: 44 [2020-08-18 12:07:15,762 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 12:07:15,766 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 [2020-08-18 12:07:15,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 12:07:15,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-18 12:07:15,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 12:07:15,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-18 12:07:15,815 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-08-18 12:07:15,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:07:15,816 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-18 12:07:15,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 12:07:15,816 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-18 12:07:15,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 12:07:15,818 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:07:15,819 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 12:07:15,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 12:07:15,820 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:07:15,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:07:15,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-08-18 12:07:15,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:07:15,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418006400] [2020-08-18 12:07:15,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:07:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:15,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:07:15,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:15,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 12:07:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:15,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 12:07:15,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418006400] [2020-08-18 12:07:15,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 12:07:15,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 12:07:15,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444660058] [2020-08-18 12:07:15,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 12:07:15,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:07:15,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 12:07:15,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 12:07:15,888 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-08-18 12:07:15,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:07:15,976 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-18 12:07:15,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 12:07:15,976 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-18 12:07:15,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:07:15,978 INFO L225 Difference]: With dead ends: 36 [2020-08-18 12:07:15,978 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 12:07:15,980 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 [2020-08-18 12:07:15,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 12:07:15,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-18 12:07:15,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 12:07:15,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-18 12:07:15,994 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-08-18 12:07:15,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:07:15,996 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-18 12:07:15,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 12:07:15,997 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-18 12:07:15,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 12:07:15,998 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:07:15,999 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] [2020-08-18 12:07:16,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 12:07:16,000 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:07:16,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:07:16,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-08-18 12:07:16,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:07:16,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699378203] [2020-08-18 12:07:16,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:07:16,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:16,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 12:07:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:16,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 12:07:16,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:16,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-18 12:07:16,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:16,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 12:07:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 12:07:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 12:07:16,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699378203] [2020-08-18 12:07:16,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 12:07:16,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 12:07:16,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642746277] [2020-08-18 12:07:16,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 12:07:16,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 12:07:16,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 12:07:16,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 12:07:16,177 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2020-08-18 12:07:16,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 12:07:16,266 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-08-18 12:07:16,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 12:07:16,267 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-18 12:07:16,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 12:07:16,269 INFO L225 Difference]: With dead ends: 58 [2020-08-18 12:07:16,269 INFO L226 Difference]: Without dead ends: 34 [2020-08-18 12:07:16,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 12:07:16,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-18 12:07:16,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-18 12:07:16,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-18 12:07:16,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-08-18 12:07:16,281 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-08-18 12:07:16,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 12:07:16,281 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-08-18 12:07:16,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 12:07:16,282 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-08-18 12:07:16,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 12:07:16,284 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 12:07:16,284 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] [2020-08-18 12:07:16,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 12:07:16,285 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 12:07:16,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 12:07:16,285 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-08-18 12:07:16,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 12:07:16,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623407289] [2020-08-18 12:07:16,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 12:07:16,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 12:07:16,302 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 12:07:16,303 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 12:07:16,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 12:07:16,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 12:07:16 BoogieIcfgContainer [2020-08-18 12:07:16,351 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 12:07:16,356 INFO L168 Benchmark]: Toolchain (without parser) took 1801.92 ms. Allocated memory was 142.1 MB in the beginning and 203.9 MB in the end (delta: 61.9 MB). Free memory was 102.6 MB in the beginning and 104.9 MB in the end (delta: -2.3 MB). Peak memory consumption was 59.6 MB. Max. memory is 7.1 GB. [2020-08-18 12:07:16,358 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 142.1 MB. Free memory was 120.7 MB in the beginning and 120.3 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. [2020-08-18 12:07:16,359 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.11 ms. Allocated memory is still 142.1 MB. Free memory was 102.1 MB in the beginning and 92.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-18 12:07:16,361 INFO L168 Benchmark]: Boogie Preprocessor took 116.10 ms. Allocated memory was 142.1 MB in the beginning and 203.9 MB in the end (delta: 61.9 MB). Free memory was 92.7 MB in the beginning and 182.8 MB in the end (delta: -90.1 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2020-08-18 12:07:16,363 INFO L168 Benchmark]: RCFGBuilder took 267.49 ms. Allocated memory is still 203.9 MB. Free memory was 182.8 MB in the beginning and 169.7 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-18 12:07:16,368 INFO L168 Benchmark]: TraceAbstraction took 1164.57 ms. Allocated memory is still 203.9 MB. Free memory was 168.8 MB in the beginning and 104.9 MB in the end (delta: 63.9 MB). Peak memory consumption was 63.9 MB. Max. memory is 7.1 GB. [2020-08-18 12:07:16,376 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 142.1 MB. Free memory was 120.7 MB in the beginning and 120.3 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 249.11 ms. Allocated memory is still 142.1 MB. Free memory was 102.1 MB in the beginning and 92.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.10 ms. Allocated memory was 142.1 MB in the beginning and 203.9 MB in the end (delta: 61.9 MB). Free memory was 92.7 MB in the beginning and 182.8 MB in the end (delta: -90.1 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 267.49 ms. Allocated memory is still 203.9 MB. Free memory was 182.8 MB in the beginning and 169.7 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1164.57 ms. Allocated memory is still 203.9 MB. Free memory was 168.8 MB in the beginning and 104.9 MB in the end (delta: 63.9 MB). Peak memory consumption was 63.9 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; [L37] CALL, EXPR fibo1(x) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND TRUE n < 1 [L19] return 0; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) [L37] int result = fibo1(x); [L38] COND TRUE result == 1 [L39] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 91 SDtfs, 43 SDslu, 232 SDs, 0 SdLazy, 107 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s 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, 0.3s InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 50 ConstructedInterpolants, 0 QuantifiedInterpolants, 1464 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 1/4 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...