/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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/Ackermann02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 00:25:27,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 00:25:27,200 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 00:25:27,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 00:25:27,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 00:25:27,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 00:25:27,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 00:25:27,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 00:25:27,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 00:25:27,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 00:25:27,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 00:25:27,260 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 00:25:27,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 00:25:27,263 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 00:25:27,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 00:25:27,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 00:25:27,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 00:25:27,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 00:25:27,292 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 00:25:27,293 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 00:25:27,295 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 00:25:27,307 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 00:25:27,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 00:25:27,309 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 00:25:27,310 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 00:25:27,310 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 00:25:27,310 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 00:25:27,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 00:25:27,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 00:25:27,311 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 00:25:27,311 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 00:25:27,311 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 00:25:27,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 00:25:27,312 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 00:25:27,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 00:25:27,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 00:25:27,312 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 00:25:27,312 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 00:25:27,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 00:25:27,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:25:27,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 00:25:27,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 00:25:27,314 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 00:25:27,314 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 00:25:27,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 00:25:27,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 00:25:27,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 00:25:27,787 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 00:25:27,787 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 00:25:27,788 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann02.c [2020-11-07 00:25:27,864 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00585aa3d/660ec1f0afc34bbbb5b15c2022351da7/FLAG708839767 [2020-11-07 00:25:28,416 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 00:25:28,416 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann02.c [2020-11-07 00:25:28,425 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00585aa3d/660ec1f0afc34bbbb5b15c2022351da7/FLAG708839767 [2020-11-07 00:25:28,816 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00585aa3d/660ec1f0afc34bbbb5b15c2022351da7 [2020-11-07 00:25:28,819 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 00:25:28,828 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 00:25:28,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 00:25:28,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 00:25:28,839 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 00:25:28,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:25:28" (1/1) ... [2020-11-07 00:25:28,843 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fe6ba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:28, skipping insertion in model container [2020-11-07 00:25:28,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:25:28" (1/1) ... [2020-11-07 00:25:28,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 00:25:28,871 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 00:25:29,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:25:29,099 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 00:25:29,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 00:25:29,134 INFO L208 MainTranslator]: Completed translation [2020-11-07 00:25:29,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:29 WrapperNode [2020-11-07 00:25:29,135 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 00:25:29,136 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 00:25:29,136 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 00:25:29,136 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 00:25:29,151 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:29" (1/1) ... [2020-11-07 00:25:29,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:29" (1/1) ... [2020-11-07 00:25:29,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:29" (1/1) ... [2020-11-07 00:25:29,159 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:29" (1/1) ... [2020-11-07 00:25:29,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:29" (1/1) ... [2020-11-07 00:25:29,168 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:29" (1/1) ... [2020-11-07 00:25:29,169 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:29" (1/1) ... [2020-11-07 00:25:29,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 00:25:29,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 00:25:29,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 00:25:29,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 00:25:29,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 00:25:29,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 00:25:29,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 00:25:29,259 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 00:25:29,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-11-07 00:25:29,260 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 00:25:29,260 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 00:25:29,260 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 00:25:29,260 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 00:25:29,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 00:25:29,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 00:25:29,262 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-11-07 00:25:29,262 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 00:25:29,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 00:25:29,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 00:25:29,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 00:25:29,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 00:25:29,264 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 00:25:29,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 00:25:29,636 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 00:25:29,637 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-07 00:25:29,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:25:29 BoogieIcfgContainer [2020-11-07 00:25:29,640 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 00:25:29,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 00:25:29,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 00:25:29,647 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 00:25:29,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:25:28" (1/3) ... [2020-11-07 00:25:29,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47500840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:25:29, skipping insertion in model container [2020-11-07 00:25:29,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:25:29" (2/3) ... [2020-11-07 00:25:29,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47500840 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:25:29, skipping insertion in model container [2020-11-07 00:25:29,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:25:29" (3/3) ... [2020-11-07 00:25:29,651 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann02.c [2020-11-07 00:25:29,668 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 00:25:29,672 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 00:25:29,686 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 00:25:29,713 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 00:25:29,714 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 00:25:29,714 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 00:25:29,714 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 00:25:29,714 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 00:25:29,714 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 00:25:29,715 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 00:25:29,715 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 00:25:29,732 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-11-07 00:25:29,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-07 00:25:29,743 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:29,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:29,745 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:29,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:29,753 INFO L82 PathProgramCache]: Analyzing trace with hash -946996355, now seen corresponding path program 1 times [2020-11-07 00:25:29,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:29,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090787588] [2020-11-07 00:25:29,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:29,848 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:30,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:30,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:30,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:25:30,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 00:25:30,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090787588] [2020-11-07 00:25:30,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:30,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 00:25:30,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681430634] [2020-11-07 00:25:30,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 00:25:30,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:30,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 00:25:30,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 00:25:30,231 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 6 states. [2020-11-07 00:25:30,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:30,753 INFO L93 Difference]: Finished difference Result 101 states and 124 transitions. [2020-11-07 00:25:30,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-07 00:25:30,755 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-11-07 00:25:30,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:30,766 INFO L225 Difference]: With dead ends: 101 [2020-11-07 00:25:30,767 INFO L226 Difference]: Without dead ends: 54 [2020-11-07 00:25:30,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-07 00:25:30,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-07 00:25:30,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-11-07 00:25:30,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-07 00:25:30,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2020-11-07 00:25:30,836 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 33 [2020-11-07 00:25:30,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:30,836 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2020-11-07 00:25:30,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 00:25:30,837 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2020-11-07 00:25:30,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-07 00:25:30,841 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:30,841 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:30,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 00:25:30,842 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:30,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:30,843 INFO L82 PathProgramCache]: Analyzing trace with hash 300807360, now seen corresponding path program 1 times [2020-11-07 00:25:30,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:30,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489592596] [2020-11-07 00:25:30,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:30,847 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:30,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:30,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:30,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:25:30,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:31,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:25:31,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:31,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-07 00:25:31,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489592596] [2020-11-07 00:25:31,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:31,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 00:25:31,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32504802] [2020-11-07 00:25:31,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 00:25:31,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:31,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 00:25:31,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-07 00:25:31,047 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 7 states. [2020-11-07 00:25:31,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:31,597 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2020-11-07 00:25:31,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 00:25:31,598 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-11-07 00:25:31,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:31,602 INFO L225 Difference]: With dead ends: 78 [2020-11-07 00:25:31,603 INFO L226 Difference]: Without dead ends: 71 [2020-11-07 00:25:31,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-11-07 00:25:31,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-07 00:25:31,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-11-07 00:25:31,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-07 00:25:31,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2020-11-07 00:25:31,635 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 43 [2020-11-07 00:25:31,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:31,636 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2020-11-07 00:25:31,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 00:25:31,637 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2020-11-07 00:25:31,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-11-07 00:25:31,641 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:31,641 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:31,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 00:25:31,642 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:31,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:31,643 INFO L82 PathProgramCache]: Analyzing trace with hash 167896605, now seen corresponding path program 2 times [2020-11-07 00:25:31,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:31,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667252381] [2020-11-07 00:25:31,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:31,648 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:31,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:31,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 00:25:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:31,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-07 00:25:31,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:31,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:25:31,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:31,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-07 00:25:31,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 00:25:31,855 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-07 00:25:31,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667252381] [2020-11-07 00:25:31,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 00:25:31,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 00:25:31,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233200181] [2020-11-07 00:25:31,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 00:25:31,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 00:25:31,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 00:25:31,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 00:25:31,859 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand 5 states. [2020-11-07 00:25:32,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 00:25:32,145 INFO L93 Difference]: Finished difference Result 125 states and 184 transitions. [2020-11-07 00:25:32,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 00:25:32,146 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-11-07 00:25:32,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 00:25:32,157 INFO L225 Difference]: With dead ends: 125 [2020-11-07 00:25:32,157 INFO L226 Difference]: Without dead ends: 75 [2020-11-07 00:25:32,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-07 00:25:32,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-11-07 00:25:32,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-11-07 00:25:32,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-11-07 00:25:32,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2020-11-07 00:25:32,192 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 53 [2020-11-07 00:25:32,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 00:25:32,193 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2020-11-07 00:25:32,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 00:25:32,193 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2020-11-07 00:25:32,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-11-07 00:25:32,197 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 00:25:32,198 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 00:25:32,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 00:25:32,198 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 00:25:32,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 00:25:32,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1842837274, now seen corresponding path program 1 times [2020-11-07 00:25:32,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 00:25:32,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767967958] [2020-11-07 00:25:32,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 00:25:32,212 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 00:25:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:25:32,245 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:25:32,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 00:25:32,275 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 00:25:32,319 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 00:25:32,319 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 00:25:32,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 00:25:32,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:25:32 BoogieIcfgContainer [2020-11-07 00:25:32,341 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 00:25:32,344 INFO L168 Benchmark]: Toolchain (without parser) took 3520.97 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 127.7 MB in the beginning and 156.6 MB in the end (delta: -28.9 MB). Peak memory consumption was 1.8 MB. Max. memory is 8.0 GB. [2020-11-07 00:25:32,345 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 151.0 MB. Free memory is still 126.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 00:25:32,346 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.64 ms. Allocated memory is still 151.0 MB. Free memory was 127.0 MB in the beginning and 117.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-07 00:25:32,347 INFO L168 Benchmark]: Boogie Preprocessor took 36.24 ms. Allocated memory is still 151.0 MB. Free memory was 117.8 MB in the beginning and 116.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 00:25:32,348 INFO L168 Benchmark]: RCFGBuilder took 467.88 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 133.5 MB in the end (delta: -17.3 MB). Peak memory consumption was 18.1 MB. Max. memory is 8.0 GB. [2020-11-07 00:25:32,349 INFO L168 Benchmark]: TraceAbstraction took 2698.52 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 133.5 MB in the beginning and 156.6 MB in the end (delta: -23.1 MB). Peak memory consumption was 6.8 MB. Max. memory is 8.0 GB. [2020-11-07 00:25:32,353 INFO L339 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 151.0 MB. Free memory is still 126.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 300.64 ms. Allocated memory is still 151.0 MB. Free memory was 127.0 MB in the beginning and 117.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.24 ms. Allocated memory is still 151.0 MB. Free memory was 117.8 MB in the beginning and 116.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 467.88 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 133.5 MB in the end (delta: -17.3 MB). Peak memory consumption was 18.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2698.52 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 133.5 MB in the beginning and 156.6 MB in the end (delta: -23.1 MB). Peak memory consumption was 6.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L28] int m = __VERIFIER_nondet_int(); [L29] COND FALSE !(m < 0 || m > 3) [L34] int n = __VERIFIER_nondet_int(); [L35] COND FALSE !(n < 0 || n > 23) [L41] CALL, EXPR ackermann(m,n) [L17] COND FALSE !(m==0) [L20] COND TRUE n==0 [L21] CALL, EXPR ackermann(m-1,1) [L17] COND FALSE !(m==0) [L20] COND FALSE !(n==0) [L23] CALL, EXPR ackermann(m,n-1) [L17] COND FALSE !(m==0) [L20] COND TRUE n==0 [L21] CALL, EXPR ackermann(m-1,1) [L17] COND TRUE m==0 [L18] return n+1; [L21] RET, EXPR ackermann(m-1,1) [L21] return ackermann(m-1,1); [L23] RET, EXPR ackermann(m,n-1) [L23] CALL, EXPR ackermann(m-1,ackermann(m,n-1)) [L17] COND TRUE m==0 [L18] return n+1; [L23] RET, EXPR ackermann(m-1,ackermann(m,n-1)) [L23] return ackermann(m-1,ackermann(m,n-1)); [L21] RET, EXPR ackermann(m-1,1) [L21] return ackermann(m-1,1); [L41] RET, EXPR ackermann(m,n) [L41] int result = ackermann(m,n); [L42] COND FALSE !(m < 2 || result >= 4) [L45] CALL reach_error() [L3] __assert_fail("0", "Ackermann02.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.6s, OverallIterations: 4, TraceHistogramMax: 5, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 155 SDtfs, 192 SDslu, 125 SDs, 0 SdLazy, 354 SolverSat, 91 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, 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 incorrect! Received shutdown request...