/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/recursive/Addition02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:58:08,807 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:58:08,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:58:08,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 06:58:08,961 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:58:08,989 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:58:08,989 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:58:08,990 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:58:08,991 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:58:08,991 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:58:08,991 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:58:08,991 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:58:08,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:58:08,992 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:58:08,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:58:08,992 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:58:08,992 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:58:08,993 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:58:08,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:58:08,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:58:08,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:58:08,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:58:08,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:58:08,994 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:58:08,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:58:08,995 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:58:08,995 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:58:08,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:58:08,995 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:58:08,995 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:58:08,996 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:58:09,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:58:09,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:58:09,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:58:09,395 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:58:09,396 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:58:09,397 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Addition02.c [2020-12-22 06:58:09,496 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d748a80ba/eabc9fad90c149bf8a3bbf09738b9549/FLAG63ed9ec0e [2020-12-22 06:58:10,268 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:58:10,269 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Addition02.c [2020-12-22 06:58:10,277 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d748a80ba/eabc9fad90c149bf8a3bbf09738b9549/FLAG63ed9ec0e [2020-12-22 06:58:10,630 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d748a80ba/eabc9fad90c149bf8a3bbf09738b9549 [2020-12-22 06:58:10,633 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:58:10,637 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:58:10,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:58:10,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:58:10,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:58:10,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:58:10" (1/1) ... [2020-12-22 06:58:10,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2892e2ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:10, skipping insertion in model container [2020-12-22 06:58:10,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:58:10" (1/1) ... [2020-12-22 06:58:10,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:58:10,683 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:58:10,846 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Addition02.c[1124,1137] [2020-12-22 06:58:10,850 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:58:10,876 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:58:10,899 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Addition02.c[1124,1137] [2020-12-22 06:58:10,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:58:10,920 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:58:10,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:10 WrapperNode [2020-12-22 06:58:10,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:58:10,923 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:58:10,923 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:58:10,923 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:58:10,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:10" (1/1) ... [2020-12-22 06:58:10,943 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:10" (1/1) ... [2020-12-22 06:58:10,979 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:58:10,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:58:10,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:58:10,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:58:11,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:10" (1/1) ... [2020-12-22 06:58:11,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:10" (1/1) ... [2020-12-22 06:58:11,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:10" (1/1) ... [2020-12-22 06:58:11,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:10" (1/1) ... [2020-12-22 06:58:11,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:10" (1/1) ... [2020-12-22 06:58:11,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:10" (1/1) ... [2020-12-22 06:58:11,034 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:10" (1/1) ... [2020-12-22 06:58:11,037 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:58:11,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:58:11,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:58:11,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:58:11,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:10" (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 [2020-12-22 06:58:11,192 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:58:11,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:58:11,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:58:11,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:58:11,193 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2020-12-22 06:58:11,194 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2020-12-22 06:58:11,546 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:58:11,547 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 06:58:11,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:58:11 BoogieIcfgContainer [2020-12-22 06:58:11,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:58:11,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:58:11,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:58:11,603 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:58:11,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:58:10" (1/3) ... [2020-12-22 06:58:11,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f571004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:58:11, skipping insertion in model container [2020-12-22 06:58:11,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:10" (2/3) ... [2020-12-22 06:58:11,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f571004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:58:11, skipping insertion in model container [2020-12-22 06:58:11,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:58:11" (3/3) ... [2020-12-22 06:58:11,611 INFO L111 eAbstractionObserver]: Analyzing ICFG Addition02.c [2020-12-22 06:58:11,632 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:58:11,664 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 06:58:11,698 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 06:58:11,729 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:58:11,729 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:58:11,729 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:58:11,730 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:58:11,730 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:58:11,730 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:58:11,730 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:58:11,730 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:58:11,769 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-12-22 06:58:11,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 06:58:11,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:11,782 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:11,783 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:11,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:11,792 INFO L82 PathProgramCache]: Analyzing trace with hash 663264039, now seen corresponding path program 1 times [2020-12-22 06:58:11,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:11,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092431058] [2020-12-22 06:58:11,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:12,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-12-22 06:58:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:58:12,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092431058] [2020-12-22 06:58:12,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:58:12,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 06:58:12,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011159780] [2020-12-22 06:58:12,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 06:58:12,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:12,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 06:58:12,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:58:12,364 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2020-12-22 06:58:12,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:12,533 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2020-12-22 06:58:12,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:58:12,535 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-22 06:58:12,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:12,544 INFO L225 Difference]: With dead ends: 34 [2020-12-22 06:58:12,545 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 06:58:12,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:58:12,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 06:58:12,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-22 06:58:12,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 06:58:12,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2020-12-22 06:58:12,599 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2020-12-22 06:58:12,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:12,599 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2020-12-22 06:58:12,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 06:58:12,600 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2020-12-22 06:58:12,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 06:58:12,602 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:12,602 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:12,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:58:12,603 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:12,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:12,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1508496640, now seen corresponding path program 1 times [2020-12-22 06:58:12,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:12,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536798779] [2020-12-22 06:58:12,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:12,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:12,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-12-22 06:58:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:12,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:58:12,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536798779] [2020-12-22 06:58:12,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:58:12,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 06:58:12,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778185422] [2020-12-22 06:58:12,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 06:58:12,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:12,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 06:58:12,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:58:12,719 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 7 states. [2020-12-22 06:58:12,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:12,798 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2020-12-22 06:58:12,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 06:58:12,799 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-12-22 06:58:12,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:12,800 INFO L225 Difference]: With dead ends: 32 [2020-12-22 06:58:12,800 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 06:58:12,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 06:58:12,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 06:58:12,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-22 06:58:12,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 06:58:12,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-22 06:58:12,808 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2020-12-22 06:58:12,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:12,809 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-22 06:58:12,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 06:58:12,809 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-22 06:58:12,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 06:58:12,811 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:12,811 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:12,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 06:58:12,811 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:12,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:12,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1330690599, now seen corresponding path program 1 times [2020-12-22 06:58:12,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:12,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554883692] [2020-12-22 06:58:12,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 06:58:12,862 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 06:58:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 06:58:12,916 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 06:58:12,960 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 06:58:12,960 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 06:58:12,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 06:58:13,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 06:58:13 BoogieIcfgContainer [2020-12-22 06:58:13,035 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 06:58:13,037 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 06:58:13,037 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 06:58:13,037 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 06:58:13,038 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:58:11" (3/4) ... [2020-12-22 06:58:13,041 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 06:58:13,146 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive/Addition02.c-witness.graphml [2020-12-22 06:58:13,146 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 06:58:13,150 INFO L168 Benchmark]: Toolchain (without parser) took 2510.39 ms. Allocated memory is still 159.4 MB. Free memory was 134.7 MB in the beginning and 77.2 MB in the end (delta: 57.5 MB). Peak memory consumption was 57.7 MB. Max. memory is 8.0 GB. [2020-12-22 06:58:13,151 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 159.4 MB. Free memory is still 131.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 06:58:13,153 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.43 ms. Allocated memory is still 159.4 MB. Free memory was 134.5 MB in the beginning and 124.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 06:58:13,162 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.09 ms. Allocated memory is still 159.4 MB. Free memory was 124.5 MB in the beginning and 123.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 06:58:13,163 INFO L168 Benchmark]: Boogie Preprocessor took 53.77 ms. Allocated memory is still 159.4 MB. Free memory was 123.2 MB in the beginning and 122.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 06:58:13,163 INFO L168 Benchmark]: RCFGBuilder took 503.94 ms. Allocated memory is still 159.4 MB. Free memory was 122.2 MB in the beginning and 109.4 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-12-22 06:58:13,164 INFO L168 Benchmark]: TraceAbstraction took 1449.46 ms. Allocated memory is still 159.4 MB. Free memory was 142.2 MB in the beginning and 79.3 MB in the end (delta: 62.9 MB). Peak memory consumption was 61.9 MB. Max. memory is 8.0 GB. [2020-12-22 06:58:13,165 INFO L168 Benchmark]: Witness Printer took 109.65 ms. Allocated memory is still 159.4 MB. Free memory was 79.3 MB in the beginning and 77.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 06:58:13,169 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 159.4 MB. Free memory is still 131.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 276.43 ms. Allocated memory is still 159.4 MB. Free memory was 134.5 MB in the beginning and 124.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 59.09 ms. Allocated memory is still 159.4 MB. Free memory was 124.5 MB in the beginning and 123.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 53.77 ms. Allocated memory is still 159.4 MB. Free memory was 123.2 MB in the beginning and 122.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 503.94 ms. Allocated memory is still 159.4 MB. Free memory was 122.2 MB in the beginning and 109.4 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1449.46 ms. Allocated memory is still 159.4 MB. Free memory was 142.2 MB in the beginning and 79.3 MB in the end (delta: 62.9 MB). Peak memory consumption was 61.9 MB. Max. memory is 8.0 GB. * Witness Printer took 109.65 ms. Allocated memory is still 159.4 MB. Free memory was 79.3 MB in the beginning and 77.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 45]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L29] int m = __VERIFIER_nondet_int(); [L30] COND FALSE !(m < 0 || m > 1073741823) [L35] int n = __VERIFIER_nondet_int(); [L36] COND FALSE !(n < 0 || n > 1073741823) [L41] CALL, EXPR addition(m,n) VAL [\old(m)=0, \old(n)=1] [L16] COND FALSE !(n == 0) VAL [\old(m)=0, \old(n)=1, m=0, n=1] [L19] COND TRUE n > 0 VAL [\old(m)=0, \old(n)=1, m=0, n=1] [L20] CALL, EXPR addition(m+1, n-1) VAL [\old(m)=1, \old(n)=0] [L16] COND TRUE n == 0 [L17] return m; VAL [\old(m)=1, \old(n)=0, \result=1, m=1, n=0] [L20] RET, EXPR addition(m+1, n-1) VAL [\old(m)=0, \old(n)=1, addition(m+1, n-1)=1, m=0, n=1] [L20] return addition(m+1, n-1); [L41] RET, EXPR addition(m,n) [L41] int result = addition(m,n); [L42] COND FALSE !(result == m - n) [L45] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 35 SDtfs, 34 SDslu, 72 SDs, 0 SdLazy, 121 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 45 NumberOfCodeBlocks, 45 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 1237 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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...