/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/Addition02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 16:12:06,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 16:12:06,983 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 16:12:07,028 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 16:12:07,028 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 16:12:07,039 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 16:12:07,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 16:12:07,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 16:12:07,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 16:12:07,047 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 16:12:07,048 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 16:12:07,050 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 16:12:07,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 16:12:07,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 16:12:07,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 16:12:07,057 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 16:12:07,058 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 16:12:07,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 16:12:07,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 16:12:07,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 16:12:07,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 16:12:07,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 16:12:07,074 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 16:12:07,075 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 16:12:07,079 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 16:12:07,089 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 16:12:07,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 16:12:07,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 16:12:07,093 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 16:12:07,106 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 16:12:07,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 16:12:07,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 16:12:07,107 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 16:12:07,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 16:12:07,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 16:12:07,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 16:12:07,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 16:12:07,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 16:12:07,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 16:12:07,109 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 16:12:07,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 16:12:07,109 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 16:12:07,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 16:12:07,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 16:12:07,110 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 16:12:07,110 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 16:12:07,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 16:12:07,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:12:07,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 16:12:07,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 16:12:07,111 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 16:12:07,112 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 16:12:07,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 16:12:07,539 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 16:12:07,542 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 16:12:07,544 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 16:12:07,544 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 16:12:07,545 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Addition02.c [2020-09-04 16:12:07,635 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3dbd70fe6/442aa9be039146dab1500df6e8747492/FLAG15cc4587c [2020-09-04 16:12:08,162 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 16:12:08,162 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/Addition02.c [2020-09-04 16:12:08,169 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3dbd70fe6/442aa9be039146dab1500df6e8747492/FLAG15cc4587c [2020-09-04 16:12:08,509 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3dbd70fe6/442aa9be039146dab1500df6e8747492 [2020-09-04 16:12:08,521 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 16:12:08,523 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 16:12:08,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 16:12:08,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 16:12:08,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 16:12:08,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:12:08" (1/1) ... [2020-09-04 16:12:08,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d084142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:12:08, skipping insertion in model container [2020-09-04 16:12:08,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:12:08" (1/1) ... [2020-09-04 16:12:08,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 16:12:08,571 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 16:12:08,791 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:12:08,796 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 16:12:08,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:12:08,843 INFO L208 MainTranslator]: Completed translation [2020-09-04 16:12:08,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:12:08 WrapperNode [2020-09-04 16:12:08,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 16:12:08,844 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 16:12:08,844 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 16:12:08,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 16:12:08,859 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:12:08" (1/1) ... [2020-09-04 16:12:08,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:12:08" (1/1) ... [2020-09-04 16:12:08,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:12:08" (1/1) ... [2020-09-04 16:12:08,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:12:08" (1/1) ... [2020-09-04 16:12:08,868 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:12:08" (1/1) ... [2020-09-04 16:12:08,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:12:08" (1/1) ... [2020-09-04 16:12:08,872 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:12:08" (1/1) ... [2020-09-04 16:12:08,874 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 16:12:08,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 16:12:08,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 16:12:08,875 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 16:12:08,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:12:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:12:09,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 16:12:09,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 16:12:09,039 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2020-09-04 16:12:09,039 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 16:12:09,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 16:12:09,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 16:12:09,039 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2020-09-04 16:12:09,039 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 16:12:09,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 16:12:09,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 16:12:09,287 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 16:12:09,288 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 16:12:09,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:12:09 BoogieIcfgContainer [2020-09-04 16:12:09,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 16:12:09,296 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 16:12:09,296 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 16:12:09,300 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 16:12:09,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 04:12:08" (1/3) ... [2020-09-04 16:12:09,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e4568c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:12:09, skipping insertion in model container [2020-09-04 16:12:09,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:12:08" (2/3) ... [2020-09-04 16:12:09,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e4568c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:12:09, skipping insertion in model container [2020-09-04 16:12:09,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:12:09" (3/3) ... [2020-09-04 16:12:09,304 INFO L109 eAbstractionObserver]: Analyzing ICFG Addition02.c [2020-09-04 16:12:09,317 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 16:12:09,327 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 16:12:09,351 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 16:12:09,380 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 16:12:09,380 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 16:12:09,381 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 16:12:09,381 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 16:12:09,381 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 16:12:09,382 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 16:12:09,382 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 16:12:09,382 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 16:12:09,405 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-09-04 16:12:09,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-04 16:12:09,425 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:12:09,427 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] [2020-09-04 16:12:09,427 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:12:09,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:12:09,436 INFO L82 PathProgramCache]: Analyzing trace with hash 935018920, now seen corresponding path program 1 times [2020-09-04 16:12:09,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:12:09,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688427070] [2020-09-04 16:12:09,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:12:09,512 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:12:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:12:09,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:12:09,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:12:09,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 16:12:09,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:12:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:12:09,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688427070] [2020-09-04 16:12:09,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:12:09,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-04 16:12:09,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560572656] [2020-09-04 16:12:09,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 16:12:09,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:12:09,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 16:12:09,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-04 16:12:09,914 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 9 states. [2020-09-04 16:12:10,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:12:10,191 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2020-09-04 16:12:10,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 16:12:10,193 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-09-04 16:12:10,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:12:10,207 INFO L225 Difference]: With dead ends: 56 [2020-09-04 16:12:10,207 INFO L226 Difference]: Without dead ends: 37 [2020-09-04 16:12:10,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-04 16:12:10,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-04 16:12:10,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-09-04 16:12:10,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-04 16:12:10,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-09-04 16:12:10,273 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 24 [2020-09-04 16:12:10,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:12:10,273 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-09-04 16:12:10,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 16:12:10,274 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-09-04 16:12:10,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-04 16:12:10,277 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:12:10,277 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] [2020-09-04 16:12:10,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 16:12:10,278 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:12:10,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:12:10,278 INFO L82 PathProgramCache]: Analyzing trace with hash 2135506668, now seen corresponding path program 1 times [2020-09-04 16:12:10,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:12:10,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625233914] [2020-09-04 16:12:10,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:12:10,281 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:12:10,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:12:10,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:12:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:12:10,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 16:12:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:12:10,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:12:10,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625233914] [2020-09-04 16:12:10,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:12:10,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 16:12:10,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468270709] [2020-09-04 16:12:10,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 16:12:10,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:12:10,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 16:12:10,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-04 16:12:10,403 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 6 states. [2020-09-04 16:12:10,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:12:10,500 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-09-04 16:12:10,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 16:12:10,500 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-09-04 16:12:10,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:12:10,502 INFO L225 Difference]: With dead ends: 56 [2020-09-04 16:12:10,502 INFO L226 Difference]: Without dead ends: 32 [2020-09-04 16:12:10,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-04 16:12:10,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-04 16:12:10,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-09-04 16:12:10,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-04 16:12:10,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-09-04 16:12:10,514 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 25 [2020-09-04 16:12:10,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:12:10,514 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-09-04 16:12:10,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 16:12:10,515 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-09-04 16:12:10,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-04 16:12:10,516 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:12:10,516 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:12:10,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 16:12:10,517 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:12:10,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:12:10,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1044754306, now seen corresponding path program 1 times [2020-09-04 16:12:10,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:12:10,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858605216] [2020-09-04 16:12:10,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:12:10,521 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:12:10,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:12:10,541 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:12:10,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:12:10,556 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:12:10,580 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 16:12:10,581 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 16:12:10,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 16:12:10,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 04:12:10 BoogieIcfgContainer [2020-09-04 16:12:10,610 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 16:12:10,614 INFO L168 Benchmark]: Toolchain (without parser) took 2089.00 ms. Allocated memory was 147.3 MB in the beginning and 234.4 MB in the end (delta: 87.0 MB). Free memory was 103.6 MB in the beginning and 197.8 MB in the end (delta: -94.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 16:12:10,615 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 147.3 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 16:12:10,618 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.16 ms. Allocated memory is still 147.3 MB. Free memory was 103.4 MB in the beginning and 93.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-04 16:12:10,619 INFO L168 Benchmark]: Boogie Preprocessor took 29.62 ms. Allocated memory is still 147.3 MB. Free memory was 93.9 MB in the beginning and 92.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-04 16:12:10,621 INFO L168 Benchmark]: RCFGBuilder took 420.03 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 92.3 MB in the beginning and 169.9 MB in the end (delta: -77.6 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-09-04 16:12:10,623 INFO L168 Benchmark]: TraceAbstraction took 1314.32 ms. Allocated memory was 204.5 MB in the beginning and 234.4 MB in the end (delta: 29.9 MB). Free memory was 169.3 MB in the beginning and 197.8 MB in the end (delta: -28.6 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-04 16:12:10,635 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 147.3 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 318.16 ms. Allocated memory is still 147.3 MB. Free memory was 103.4 MB in the beginning and 93.9 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.62 ms. Allocated memory is still 147.3 MB. Free memory was 93.9 MB in the beginning and 92.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 420.03 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 92.3 MB in the beginning and 169.9 MB in the end (delta: -77.6 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1314.32 ms. Allocated memory was 204.5 MB in the beginning and 234.4 MB in the end (delta: 29.9 MB). Free memory was 169.3 MB in the beginning and 197.8 MB in the end (delta: -28.6 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 43]: 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] COND FALSE !(m < 0 || m > 1073741823) [L33] int n = __VERIFIER_nondet_int(); [L34] COND FALSE !(n < 0 || n > 1073741823) [L39] 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); [L39] RET, EXPR addition(m,n) [L39] int result = addition(m,n); [L40] COND FALSE !(result == m - n) [L43] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 69 SDtfs, 85 SDslu, 207 SDs, 0 SdLazy, 150 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred 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: 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...