/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/EvenOdd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:26:04,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:26:04,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:26:04,702 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 20:26:04,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:26:04,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:26:04,733 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:26:04,735 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:26:04,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:26:04,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:26:04,745 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:26:04,752 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:26:04,753 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:26:04,754 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:26:04,756 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:26:04,757 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:26:04,759 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 20:26:04,775 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:26:04,776 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:26:04,777 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:26:04,778 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 20:26:04,790 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:26:04,790 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:26:04,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:26:04,792 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:26:04,792 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:26:04,792 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:26:04,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:26:04,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:26:04,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:26:04,793 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:26:04,793 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:26:04,794 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:26:04,794 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:26:04,794 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:26:04,794 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:26:04,794 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:26:04,794 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:26:04,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:26:04,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:26:04,795 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:26:04,795 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:26:04,795 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:26:04,796 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:26:05,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:26:05,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:26:05,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:26:05,202 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:26:05,209 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:26:05,211 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/EvenOdd01-1.c [2020-10-23 20:26:05,300 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61eae4a81/b45341669fd440a889b2d02666728cde/FLAGa6d0bcdbb [2020-10-23 20:26:06,020 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:26:06,021 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/EvenOdd01-1.c [2020-10-23 20:26:06,029 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61eae4a81/b45341669fd440a889b2d02666728cde/FLAGa6d0bcdbb [2020-10-23 20:26:06,392 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61eae4a81/b45341669fd440a889b2d02666728cde [2020-10-23 20:26:06,396 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:26:06,403 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:26:06,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:26:06,406 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:26:06,412 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:26:06,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:26:06" (1/1) ... [2020-10-23 20:26:06,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a0bf3c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:06, skipping insertion in model container [2020-10-23 20:26:06,419 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:26:06" (1/1) ... [2020-10-23 20:26:06,428 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:26:06,446 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:26:06,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:26:06,673 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:26:06,694 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:26:06,713 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:26:06,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:06 WrapperNode [2020-10-23 20:26:06,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:26:06,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:26:06,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:26:06,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:26:06,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:06" (1/1) ... [2020-10-23 20:26:06,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:06" (1/1) ... [2020-10-23 20:26:06,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:06" (1/1) ... [2020-10-23 20:26:06,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:06" (1/1) ... [2020-10-23 20:26:06,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:06" (1/1) ... [2020-10-23 20:26:06,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:06" (1/1) ... [2020-10-23 20:26:06,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:06" (1/1) ... [2020-10-23 20:26:06,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:26:06,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:26:06,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:26:06,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:26:06,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:06" (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 [2020-10-23 20:26:06,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:26:06,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:26:06,853 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:26:06,853 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2020-10-23 20:26:06,853 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2020-10-23 20:26:06,854 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:26:06,854 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:26:06,854 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:26:06,855 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:26:06,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:26:06,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 20:26:06,856 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2020-10-23 20:26:06,856 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2020-10-23 20:26:06,856 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:26:06,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:26:06,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:26:06,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:26:06,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:26:06,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:26:06,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:26:07,236 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:26:07,237 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 20:26:07,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:26:07 BoogieIcfgContainer [2020-10-23 20:26:07,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:26:07,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:26:07,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:26:07,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:26:07,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:26:06" (1/3) ... [2020-10-23 20:26:07,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@420ca414 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:26:07, skipping insertion in model container [2020-10-23 20:26:07,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:06" (2/3) ... [2020-10-23 20:26:07,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@420ca414 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:26:07, skipping insertion in model container [2020-10-23 20:26:07,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:26:07" (3/3) ... [2020-10-23 20:26:07,251 INFO L111 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2020-10-23 20:26:07,265 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:26:07,271 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:26:07,289 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:26:07,328 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:26:07,328 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:26:07,328 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:26:07,328 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:26:07,329 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:26:07,329 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:26:07,329 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:26:07,329 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:26:07,346 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-10-23 20:26:07,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 20:26:07,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:07,358 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] [2020-10-23 20:26:07,358 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:07,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:07,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1910946050, now seen corresponding path program 1 times [2020-10-23 20:26:07,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:07,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642480032] [2020-10-23 20:26:07,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:07,456 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:07,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:07,982 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 14 [2020-10-23 20:26:08,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:08,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:08,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:26:08,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:08,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:26:08,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642480032] [2020-10-23 20:26:08,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:08,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 20:26:08,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304648886] [2020-10-23 20:26:08,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 20:26:08,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:08,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 20:26:08,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:26:08,303 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 10 states. [2020-10-23 20:26:09,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:09,078 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2020-10-23 20:26:09,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 20:26:09,081 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-23 20:26:09,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:09,092 INFO L225 Difference]: With dead ends: 75 [2020-10-23 20:26:09,092 INFO L226 Difference]: Without dead ends: 49 [2020-10-23 20:26:09,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-10-23 20:26:09,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-23 20:26:09,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-23 20:26:09,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-23 20:26:09,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-23 20:26:09,164 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 29 [2020-10-23 20:26:09,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:09,165 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-23 20:26:09,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 20:26:09,165 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-23 20:26:09,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-23 20:26:09,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:09,168 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] [2020-10-23 20:26:09,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:26:09,169 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:09,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:09,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1953874381, now seen corresponding path program 1 times [2020-10-23 20:26:09,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:09,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397383389] [2020-10-23 20:26:09,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:09,174 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:09,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:09,501 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 16 [2020-10-23 20:26:09,640 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 16 [2020-10-23 20:26:09,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:09,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:09,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:26:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:09,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:26:09,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397383389] [2020-10-23 20:26:09,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:09,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 20:26:09,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174590062] [2020-10-23 20:26:09,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 20:26:09,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:09,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 20:26:09,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:26:09,799 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 10 states. [2020-10-23 20:26:10,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:10,472 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-10-23 20:26:10,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 20:26:10,474 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-10-23 20:26:10,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:10,478 INFO L225 Difference]: With dead ends: 59 [2020-10-23 20:26:10,478 INFO L226 Difference]: Without dead ends: 51 [2020-10-23 20:26:10,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-10-23 20:26:10,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-23 20:26:10,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-10-23 20:26:10,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-23 20:26:10,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-23 20:26:10,506 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 30 [2020-10-23 20:26:10,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:10,507 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-23 20:26:10,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 20:26:10,507 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-23 20:26:10,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-23 20:26:10,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:10,512 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, 1, 1, 1, 1, 1] [2020-10-23 20:26:10,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:26:10,513 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:10,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:10,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1657503486, now seen corresponding path program 1 times [2020-10-23 20:26:10,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:10,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142559802] [2020-10-23 20:26:10,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:10,517 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:10,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:10,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:26:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:10,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:26:10,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:26:10,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142559802] [2020-10-23 20:26:10,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:10,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:26:10,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283746313] [2020-10-23 20:26:10,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:26:10,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:10,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:26:10,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:26:10,647 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 6 states. [2020-10-23 20:26:11,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:11,016 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2020-10-23 20:26:11,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 20:26:11,018 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-10-23 20:26:11,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:11,020 INFO L225 Difference]: With dead ends: 71 [2020-10-23 20:26:11,020 INFO L226 Difference]: Without dead ends: 50 [2020-10-23 20:26:11,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 20:26:11,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-23 20:26:11,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-10-23 20:26:11,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-23 20:26:11,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-10-23 20:26:11,035 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 38 [2020-10-23 20:26:11,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:11,036 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-10-23 20:26:11,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:26:11,036 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-10-23 20:26:11,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 20:26:11,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:11,038 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, 1, 1, 1, 1, 1, 1] [2020-10-23 20:26:11,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:26:11,038 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:11,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:11,039 INFO L82 PathProgramCache]: Analyzing trace with hash -414272378, now seen corresponding path program 1 times [2020-10-23 20:26:11,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:11,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65435238] [2020-10-23 20:26:11,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:11,042 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:11,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:11,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:11,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:11,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:26:11,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:11,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 20:26:11,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:11,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:26:11,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65435238] [2020-10-23 20:26:11,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:11,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-23 20:26:11,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106645243] [2020-10-23 20:26:11,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 20:26:11,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:11,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 20:26:11,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-23 20:26:11,398 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 13 states. [2020-10-23 20:26:12,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:12,363 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2020-10-23 20:26:12,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 20:26:12,364 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-23 20:26:12,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:12,367 INFO L225 Difference]: With dead ends: 63 [2020-10-23 20:26:12,367 INFO L226 Difference]: Without dead ends: 55 [2020-10-23 20:26:12,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2020-10-23 20:26:12,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-23 20:26:12,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2020-10-23 20:26:12,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-23 20:26:12,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-10-23 20:26:12,402 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 39 [2020-10-23 20:26:12,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:12,403 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-10-23 20:26:12,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 20:26:12,403 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-10-23 20:26:12,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-23 20:26:12,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:12,407 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:26:12,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:26:12,408 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:12,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:12,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1350050731, now seen corresponding path program 1 times [2020-10-23 20:26:12,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:12,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761833536] [2020-10-23 20:26:12,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:12,778 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 20:26:12,960 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 20:26:13,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:26:13,009 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:26:13,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:26:13,071 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:26:13,126 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 20:26:13,127 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 20:26:13,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 20:26:13,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:26:13 BoogieIcfgContainer [2020-10-23 20:26:13,152 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 20:26:13,155 INFO L168 Benchmark]: Toolchain (without parser) took 6756.24 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 129.4 MB in the beginning and 96.6 MB in the end (delta: 32.8 MB). Peak memory consumption was 64.7 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:13,156 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 125.8 MB. Free memory is still 102.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:26:13,160 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.22 ms. Allocated memory is still 153.1 MB. Free memory was 128.8 MB in the beginning and 119.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:13,161 INFO L168 Benchmark]: Boogie Preprocessor took 40.29 ms. Allocated memory is still 153.1 MB. Free memory was 119.4 MB in the beginning and 117.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:13,164 INFO L168 Benchmark]: RCFGBuilder took 483.38 ms. Allocated memory is still 153.1 MB. Free memory was 117.9 MB in the beginning and 135.5 MB in the end (delta: -17.6 MB). Peak memory consumption was 18.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:13,170 INFO L168 Benchmark]: TraceAbstraction took 5910.41 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 135.0 MB in the beginning and 96.6 MB in the end (delta: 38.4 MB). Peak memory consumption was 69.7 MB. Max. memory is 8.0 GB. [2020-10-23 20:26:13,182 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 125.8 MB. Free memory is still 102.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 309.22 ms. Allocated memory is still 153.1 MB. Free memory was 128.8 MB in the beginning and 119.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.29 ms. Allocated memory is still 153.1 MB. Free memory was 119.4 MB in the beginning and 117.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 483.38 ms. Allocated memory is still 153.1 MB. Free memory was 117.9 MB in the beginning and 135.5 MB in the end (delta: -17.6 MB). Peak memory consumption was 18.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5910.41 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 135.0 MB in the beginning and 96.6 MB in the end (delta: 38.4 MB). Peak memory consumption was 69.7 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: [L40] int n = __VERIFIER_nondet_int(); [L41] COND FALSE !(n < 0) [L44] CALL, EXPR isOdd(n) [L19] COND FALSE !(n == 0) [L21] COND FALSE !(n == 1) [L24] CALL, EXPR isEven(n - 1) [L29] COND FALSE !(n == 0) [L31] COND FALSE !(n == 1) [L34] CALL, EXPR isOdd(n - 1) [L19] COND TRUE n == 0 [L20] return 0; [L34] RET, EXPR isOdd(n - 1) [L34] return isOdd(n - 1); [L24] RET, EXPR isEven(n - 1) [L24] return isEven(n - 1); [L44] RET, EXPR isOdd(n) [L44] int result = isOdd(n); [L45] int mod = n % 2; [L46] COND FALSE !(result < 0 || result == mod) [L49] CALL reach_error() [L3] __assert_fail("0", "EvenOdd01-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.8s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 170 SDtfs, 258 SDslu, 326 SDs, 0 SdLazy, 768 SolverSat, 49 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred 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: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 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...