/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-simple/sum_2x3-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 09:27:49,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 09:27:49,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 09:27:49,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 09:27:49,148 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 09:27:49,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 09:27:49,157 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 09:27:49,163 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 09:27:49,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 09:27:49,173 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 09:27:49,178 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 09:27:49,179 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 09:27:49,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 09:27:49,184 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 09:27:49,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 09:27:49,188 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 09:27:49,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 09:27:49,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 09:27:49,201 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 09:27:49,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 09:27:49,226 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 09:27:49,229 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 09:27:49,230 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 09:27:49,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 09:27:49,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 09:27:49,244 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 09:27:49,244 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 09:27:49,247 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 09:27:49,247 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 09:27:49,249 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 09:27:49,249 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 09:27:49,250 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 09:27:49,252 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 09:27:49,253 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 09:27:49,254 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 09:27:49,254 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 09:27:49,255 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 09:27:49,262 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 09:27:49,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 09:27:49,264 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 09:27:49,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 09:27:49,265 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 09:27:49,316 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 09:27:49,316 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 09:27:49,320 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 09:27:49,320 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 09:27:49,321 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 09:27:49,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 09:27:49,321 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 09:27:49,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 09:27:49,321 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 09:27:49,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 09:27:49,323 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 09:27:49,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 09:27:49,323 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 09:27:49,324 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 09:27:49,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 09:27:49,324 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 09:27:49,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 09:27:49,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:27:49,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 09:27:49,325 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 09:27:49,325 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 09:27:49,325 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 09:27:49,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 09:27:49,326 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 09:27:49,326 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 09:27:49,326 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 09:27:49,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 09:27:49,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 09:27:49,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 09:27:49,748 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 09:27:49,749 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 09:27:49,750 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/sum_2x3-1.c [2020-12-23 09:27:49,847 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/da4b48291/2b8d02a39f3d4548941a1f73853d18db/FLAG0f6a86c18 [2020-12-23 09:27:50,464 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 09:27:50,465 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_2x3-1.c [2020-12-23 09:27:50,474 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/da4b48291/2b8d02a39f3d4548941a1f73853d18db/FLAG0f6a86c18 [2020-12-23 09:27:50,859 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/da4b48291/2b8d02a39f3d4548941a1f73853d18db [2020-12-23 09:27:50,862 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 09:27:50,865 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 09:27:50,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 09:27:50,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 09:27:50,874 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 09:27:50,875 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:27:50" (1/1) ... [2020-12-23 09:27:50,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ed7c0a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:50, skipping insertion in model container [2020-12-23 09:27:50,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:27:50" (1/1) ... [2020-12-23 09:27:50,886 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 09:27:50,903 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 09:27:51,068 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_2x3-1.c[479,492] [2020-12-23 09:27:51,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:27:51,086 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 09:27:51,102 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_2x3-1.c[479,492] [2020-12-23 09:27:51,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:27:51,117 INFO L208 MainTranslator]: Completed translation [2020-12-23 09:27:51,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:51 WrapperNode [2020-12-23 09:27:51,117 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 09:27:51,119 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 09:27:51,119 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 09:27:51,119 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 09:27:51,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:51" (1/1) ... [2020-12-23 09:27:51,135 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:51" (1/1) ... [2020-12-23 09:27:51,152 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 09:27:51,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 09:27:51,153 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 09:27:51,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 09:27:51,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:51" (1/1) ... [2020-12-23 09:27:51,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:51" (1/1) ... [2020-12-23 09:27:51,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:51" (1/1) ... [2020-12-23 09:27:51,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:51" (1/1) ... [2020-12-23 09:27:51,168 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:51" (1/1) ... [2020-12-23 09:27:51,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:51" (1/1) ... [2020-12-23 09:27:51,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:51" (1/1) ... [2020-12-23 09:27:51,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 09:27:51,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 09:27:51,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 09:27:51,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 09:27:51,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 09:27:51,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 09:27:51,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 09:27:51,291 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-12-23 09:27:51,292 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-12-23 09:27:51,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 09:27:51,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 09:27:51,613 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 09:27:51,613 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-23 09:27:51,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:27:51 BoogieIcfgContainer [2020-12-23 09:27:51,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 09:27:51,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 09:27:51,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 09:27:51,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 09:27:51,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 09:27:50" (1/3) ... [2020-12-23 09:27:51,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@331e7ac5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:27:51, skipping insertion in model container [2020-12-23 09:27:51,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:51" (2/3) ... [2020-12-23 09:27:51,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@331e7ac5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:27:51, skipping insertion in model container [2020-12-23 09:27:51,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:27:51" (3/3) ... [2020-12-23 09:27:51,629 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_2x3-1.c [2020-12-23 09:27:51,637 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 09:27:51,642 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 09:27:51,666 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 09:27:51,716 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 09:27:51,717 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 09:27:51,717 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 09:27:51,717 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 09:27:51,717 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 09:27:51,718 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 09:27:51,718 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 09:27:51,718 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 09:27:51,741 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-23 09:27:51,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 09:27:51,750 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:51,751 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:51,752 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:51,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:51,759 INFO L82 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2020-12-23 09:27:51,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:51,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606857947] [2020-12-23 09:27:51,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:52,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:52,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:27:52,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606857947] [2020-12-23 09:27:52,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:27:52,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:27:52,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094976417] [2020-12-23 09:27:52,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:27:52,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:52,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:27:52,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:27:52,178 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 5 states. [2020-12-23 09:27:52,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:52,274 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-12-23 09:27:52,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:27:52,277 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-23 09:27:52,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:52,296 INFO L225 Difference]: With dead ends: 25 [2020-12-23 09:27:52,299 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 09:27:52,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:27:52,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 09:27:52,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 09:27:52,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 09:27:52,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-23 09:27:52,408 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-12-23 09:27:52,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:52,408 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-23 09:27:52,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:27:52,409 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-23 09:27:52,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 09:27:52,410 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:52,411 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:52,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 09:27:52,411 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:52,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:52,412 INFO L82 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2020-12-23 09:27:52,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:52,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931458207] [2020-12-23 09:27:52,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:52,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:52,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:52,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:52,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:52,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:52,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 09:27:52,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931458207] [2020-12-23 09:27:52,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757987175] [2020-12-23 09:27:52,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:52,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:52,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 09:27:52,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:52,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 09:27:52,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:52,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-12-23 09:27:52,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287816771] [2020-12-23 09:27:52,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 09:27:52,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:52,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 09:27:52,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-23 09:27:52,746 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2020-12-23 09:27:52,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:52,805 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-12-23 09:27:52,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:27:52,806 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-12-23 09:27:52,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:52,807 INFO L225 Difference]: With dead ends: 22 [2020-12-23 09:27:52,807 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 09:27:52,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-23 09:27:52,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 09:27:52,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-23 09:27:52,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 09:27:52,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-23 09:27:52,815 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-12-23 09:27:52,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:52,815 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-23 09:27:52,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 09:27:52,816 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-23 09:27:52,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 09:27:52,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:52,817 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:53,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 09:27:53,032 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:53,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:53,034 INFO L82 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2020-12-23 09:27:53,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:53,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666241166] [2020-12-23 09:27:53,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:53,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 09:27:53,074 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 09:27:53,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 09:27:53,120 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 09:27:53,161 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 09:27:53,161 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 09:27:53,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 09:27:53,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 09:27:53 BoogieIcfgContainer [2020-12-23 09:27:53,241 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 09:27:53,241 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 09:27:53,242 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 09:27:53,249 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 09:27:53,250 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:27:51" (3/4) ... [2020-12-23 09:27:53,254 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 09:27:53,348 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive-simple/sum_2x3-1.c-witness.graphml [2020-12-23 09:27:53,348 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 09:27:53,350 INFO L168 Benchmark]: Toolchain (without parser) took 2484.92 ms. Allocated memory is still 162.5 MB. Free memory was 138.5 MB in the beginning and 89.8 MB in the end (delta: 48.7 MB). Peak memory consumption was 49.0 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:53,351 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 162.5 MB. Free memory is still 134.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 09:27:53,352 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.37 ms. Allocated memory is still 162.5 MB. Free memory was 138.3 MB in the beginning and 129.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:53,353 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.10 ms. Allocated memory is still 162.5 MB. Free memory was 129.1 MB in the beginning and 127.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:53,353 INFO L168 Benchmark]: Boogie Preprocessor took 20.29 ms. Allocated memory is still 162.5 MB. Free memory was 127.8 MB in the beginning and 126.9 MB in the end (delta: 903.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:53,354 INFO L168 Benchmark]: RCFGBuilder took 443.04 ms. Allocated memory is still 162.5 MB. Free memory was 126.9 MB in the beginning and 115.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:53,357 INFO L168 Benchmark]: TraceAbstraction took 1621.69 ms. Allocated memory is still 162.5 MB. Free memory was 114.6 MB in the beginning and 92.4 MB in the end (delta: 22.2 MB). Peak memory consumption was 21.7 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:53,361 INFO L168 Benchmark]: Witness Printer took 106.68 ms. Allocated memory is still 162.5 MB. Free memory was 92.4 MB in the beginning and 89.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:53,368 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 162.5 MB. Free memory is still 134.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 251.37 ms. Allocated memory is still 162.5 MB. Free memory was 138.3 MB in the beginning and 129.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 33.10 ms. Allocated memory is still 162.5 MB. Free memory was 129.1 MB in the beginning and 127.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 20.29 ms. Allocated memory is still 162.5 MB. Free memory was 127.8 MB in the beginning and 126.9 MB in the end (delta: 903.2 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 443.04 ms. Allocated memory is still 162.5 MB. Free memory was 126.9 MB in the beginning and 115.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1621.69 ms. Allocated memory is still 162.5 MB. Free memory was 114.6 MB in the beginning and 92.4 MB in the end (delta: 22.2 MB). Peak memory consumption was 21.7 MB. Max. memory is 8.0 GB. * Witness Printer took 106.68 ms. Allocated memory is still 162.5 MB. Free memory was 92.4 MB in the beginning and 89.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] int a = 2; [L15] int b = 3; [L16] CALL, EXPR sum(a, b) VAL [\old(m)=3, \old(n)=2] [L6] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=2, m=3, n=2] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=1] [L6] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=1, m=4, n=1] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=0] [L6] COND TRUE n <= 0 [L7] return m + n; VAL [\old(m)=5, \old(n)=0, \result=5, m=5, n=0] [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=1, m=4, n=1, sum(n - 1, m + 1)=5] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=2, m=3, n=2, sum(n - 1, m + 1)=5] [L9] return sum(n - 1, m + 1); [L16] RET, EXPR sum(a, b) [L16] int result = sum(a, b); [L17] COND TRUE result == a + b [L18] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 20 SDtfs, 23 SDslu, 40 SDs, 0 SdLazy, 48 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=2, 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, 64 NumberOfCodeBlocks, 64 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 39 ConstructedInterpolants, 0 QuantifiedInterpolants, 1143 SizeOfPredicates, 3 NumberOfNonLiveVariables, 76 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 4/8 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...