/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive/Addition03-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 18:33:31,198 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 18:33:31,201 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 18:33:31,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 18:33:31,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 18:33:31,235 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 18:33:31,236 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 18:33:31,237 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 18:33:31,237 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 18:33:31,239 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 18:33:31,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 18:33:31,242 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 18:33:31,244 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 18:33:31,245 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 18:33:31,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 18:33:31,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 18:33:31,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 18:33:31,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 18:33:31,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 18:33:31,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 18:33:31,264 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 18:33:31,273 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 18:33:31,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 18:33:31,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 18:33:31,275 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 18:33:31,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 18:33:31,275 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 18:33:31,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 18:33:31,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 18:33:31,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 18:33:31,276 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 18:33:31,276 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 18:33:31,276 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 18:33:31,276 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 18:33:31,277 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 18:33:31,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 18:33:31,277 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 18:33:31,277 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 18:33:31,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 18:33:31,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 18:33:31,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 18:33:31,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 18:33:31,278 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 18:33:31,278 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 18:33:31,544 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 18:33:31,565 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 18:33:31,568 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 18:33:31,570 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 18:33:31,570 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 18:33:31,571 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Addition03-1.c [2020-08-22 18:33:31,636 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ded998bd9/567da843f0ee41b79bf8a5532084432f/FLAG7b07b014f [2020-08-22 18:33:32,049 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 18:33:32,050 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Addition03-1.c [2020-08-22 18:33:32,056 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ded998bd9/567da843f0ee41b79bf8a5532084432f/FLAG7b07b014f [2020-08-22 18:33:32,458 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ded998bd9/567da843f0ee41b79bf8a5532084432f [2020-08-22 18:33:32,468 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 18:33:32,470 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 18:33:32,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 18:33:32,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 18:33:32,474 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 18:33:32,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:33:32" (1/1) ... [2020-08-22 18:33:32,478 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69de4ed4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:32, skipping insertion in model container [2020-08-22 18:33:32,479 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:33:32" (1/1) ... [2020-08-22 18:33:32,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 18:33:32,503 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 18:33:32,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:33:32,692 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 18:33:32,717 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:33:32,738 INFO L208 MainTranslator]: Completed translation [2020-08-22 18:33:32,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:32 WrapperNode [2020-08-22 18:33:32,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 18:33:32,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 18:33:32,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 18:33:32,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 18:33:32,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:32" (1/1) ... [2020-08-22 18:33:32,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:32" (1/1) ... [2020-08-22 18:33:32,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:32" (1/1) ... [2020-08-22 18:33:32,842 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:32" (1/1) ... [2020-08-22 18:33:32,846 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:32" (1/1) ... [2020-08-22 18:33:32,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:32" (1/1) ... [2020-08-22 18:33:32,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:32" (1/1) ... [2020-08-22 18:33:32,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 18:33:32,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 18:33:32,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 18:33:32,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 18:33:32,866 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:32" (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 [2020-08-22 18:33:32,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 18:33:32,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 18:33:32,936 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2020-08-22 18:33:32,936 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 18:33:32,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 18:33:32,937 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 18:33:32,937 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2020-08-22 18:33:32,937 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 18:33:32,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 18:33:32,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 18:33:33,140 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 18:33:33,141 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 18:33:33,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:33:33 BoogieIcfgContainer [2020-08-22 18:33:33,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 18:33:33,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 18:33:33,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 18:33:33,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 18:33:33,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:33:32" (1/3) ... [2020-08-22 18:33:33,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46adfc0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:33:33, skipping insertion in model container [2020-08-22 18:33:33,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:33:32" (2/3) ... [2020-08-22 18:33:33,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46adfc0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:33:33, skipping insertion in model container [2020-08-22 18:33:33,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:33:33" (3/3) ... [2020-08-22 18:33:33,155 INFO L109 eAbstractionObserver]: Analyzing ICFG Addition03-1.c [2020-08-22 18:33:33,184 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 18:33:33,208 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 18:33:33,244 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 18:33:33,272 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 18:33:33,272 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 18:33:33,273 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 18:33:33,273 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 18:33:33,286 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 18:33:33,286 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 18:33:33,286 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 18:33:33,286 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 18:33:33,301 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-22 18:33:33,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 18:33:33,311 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:33,312 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] [2020-08-22 18:33:33,313 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:33,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:33,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1218957033, now seen corresponding path program 1 times [2020-08-22 18:33:33,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:33,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804526462] [2020-08-22 18:33:33,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:33,384 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:33,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:33,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:33,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 18:33:33,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:33:33,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804526462] [2020-08-22 18:33:33,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:33,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 18:33:33,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508877500] [2020-08-22 18:33:33,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 18:33:33,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:33,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 18:33:33,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:33:33,582 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 5 states. [2020-08-22 18:33:33,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:33,698 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2020-08-22 18:33:33,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 18:33:33,700 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-08-22 18:33:33,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:33,711 INFO L225 Difference]: With dead ends: 53 [2020-08-22 18:33:33,712 INFO L226 Difference]: Without dead ends: 35 [2020-08-22 18:33:33,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 18:33:33,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-22 18:33:33,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-08-22 18:33:33,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-22 18:33:33,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-08-22 18:33:33,769 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 22 [2020-08-22 18:33:33,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:33,770 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-08-22 18:33:33,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 18:33:33,770 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-08-22 18:33:33,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 18:33:33,773 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:33,773 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] [2020-08-22 18:33:33,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 18:33:33,776 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:33,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:33,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1947313727, now seen corresponding path program 1 times [2020-08-22 18:33:33,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:33,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416899290] [2020-08-22 18:33:33,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:33,779 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:33:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:33,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:33:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:33,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 18:33:33,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:33:33,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 18:33:33,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416899290] [2020-08-22 18:33:33,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:33:33,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 18:33:33,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520982989] [2020-08-22 18:33:33,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 18:33:33,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:33:33,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 18:33:33,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-22 18:33:33,836 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 4 states. [2020-08-22 18:33:33,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:33:33,877 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2020-08-22 18:33:33,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 18:33:33,878 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-08-22 18:33:33,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:33:33,880 INFO L225 Difference]: With dead ends: 51 [2020-08-22 18:33:33,880 INFO L226 Difference]: Without dead ends: 37 [2020-08-22 18:33:33,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-22 18:33:33,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-08-22 18:33:33,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-08-22 18:33:33,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-22 18:33:33,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-08-22 18:33:33,896 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 23 [2020-08-22 18:33:33,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:33:33,897 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-08-22 18:33:33,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 18:33:33,897 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-08-22 18:33:33,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 18:33:33,899 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:33:33,899 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] [2020-08-22 18:33:33,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 18:33:33,900 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:33:33,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:33:33,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1438677315, now seen corresponding path program 1 times [2020-08-22 18:33:33,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:33:33,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417145074] [2020-08-22 18:33:33,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:33:34,034 INFO L278 leratedInterpolation]: Starting analysis with loop acceleration approximation PRECISE [2020-08-22 18:33:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 18:33:34,058 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 18:33:34,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 18:33:34,076 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 18:33:34,101 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 18:33:34,101 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 18:33:34,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 18:33:34,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 06:33:34 BoogieIcfgContainer [2020-08-22 18:33:34,120 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 18:33:34,123 INFO L168 Benchmark]: Toolchain (without parser) took 1652.90 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 103.7 MB in the beginning and 110.0 MB in the end (delta: -6.3 MB). Peak memory consumption was 57.1 MB. Max. memory is 7.1 GB. [2020-08-22 18:33:34,124 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-08-22 18:33:34,125 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.94 ms. Allocated memory is still 139.5 MB. Free memory was 103.2 MB in the beginning and 93.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-22 18:33:34,127 INFO L168 Benchmark]: Boogie Preprocessor took 116.76 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 93.7 MB in the beginning and 181.3 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-08-22 18:33:34,128 INFO L168 Benchmark]: RCFGBuilder took 289.35 ms. Allocated memory is still 202.9 MB. Free memory was 181.3 MB in the beginning and 167.8 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-08-22 18:33:34,128 INFO L168 Benchmark]: TraceAbstraction took 973.58 ms. Allocated memory is still 202.9 MB. Free memory was 166.8 MB in the beginning and 110.0 MB in the end (delta: 56.8 MB). Peak memory consumption was 56.8 MB. Max. memory is 7.1 GB. [2020-08-22 18:33:34,133 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.6 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 267.94 ms. Allocated memory is still 139.5 MB. Free memory was 103.2 MB in the beginning and 93.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.76 ms. Allocated memory was 139.5 MB in the beginning and 202.9 MB in the end (delta: 63.4 MB). Free memory was 93.7 MB in the beginning and 181.3 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 289.35 ms. Allocated memory is still 202.9 MB. Free memory was 181.3 MB in the beginning and 167.8 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 973.58 ms. Allocated memory is still 202.9 MB. Free memory was 166.8 MB in the beginning and 110.0 MB in the end (delta: 56.8 MB). Peak memory consumption was 56.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 33]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L27] int m = __VERIFIER_nondet_int(); [L28] int n = __VERIFIER_nondet_int(); [L29] CALL, EXPR addition(m,n) [L14] COND FALSE !(n == 0) [L17] COND TRUE n > 0 [L18] CALL, EXPR addition(m+1, n-1) [L14] COND TRUE n == 0 [L15] return m; [L18] RET, EXPR addition(m+1, n-1) [L18] return addition(m+1, n-1); [L29] RET, EXPR addition(m,n) [L29] long long result = addition(m,n); [L30] COND FALSE !(m < 100 || n < 100 || result >= 200) [L33] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 72 SDtfs, 33 SDslu, 102 SDs, 0 SdLazy, 52 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred 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, 2 StatesRemovedByMinimization, 1 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...