./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-crafted/NestedRecursion_2a.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/termination-crafted/NestedRecursion_2a.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash a87305f2bf70381ae4b40b8cfb9e2ca1c7e8a065 ..................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 06:22:10,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 06:22:10,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 06:22:10,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 06:22:10,070 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 06:22:10,079 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 06:22:10,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 06:22:10,085 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 06:22:10,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 06:22:10,092 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 06:22:10,094 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 06:22:10,095 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 06:22:10,095 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 06:22:10,099 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 06:22:10,101 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 06:22:10,103 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 06:22:10,104 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 06:22:10,107 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 06:22:10,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 06:22:10,116 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 06:22:10,118 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 06:22:10,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 06:22:10,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 06:22:10,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 06:22:10,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 06:22:10,139 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 06:22:10,139 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 06:22:10,140 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 06:22:10,141 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 06:22:10,142 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 06:22:10,153 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 06:22:10,154 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 06:22:10,154 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 06:22:10,158 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 06:22:10,159 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 06:22:10,160 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 06:22:10,160 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 06:22:10,161 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 06:22:10,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 06:22:10,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 06:22:10,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 06:22:10,166 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2020-10-20 06:22:10,202 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 06:22:10,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 06:22:10,207 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 06:22:10,207 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 06:22:10,207 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 06:22:10,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 06:22:10,208 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 06:22:10,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 06:22:10,208 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 06:22:10,209 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 06:22:10,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 06:22:10,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 06:22:10,210 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-10-20 06:22:10,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 06:22:10,211 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 06:22:10,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 06:22:10,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 06:22:10,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 06:22:10,212 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 06:22:10,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 06:22:10,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 06:22:10,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 06:22:10,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 06:22:10,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 06:22:10,214 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 06:22:10,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 06:22:10,214 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 06:22:10,215 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 06:22:10,215 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a87305f2bf70381ae4b40b8cfb9e2ca1c7e8a065 [2020-10-20 06:22:10,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 06:22:10,442 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 06:22:10,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 06:22:10,447 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 06:22:10,448 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 06:22:10,449 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/NestedRecursion_2a.c [2020-10-20 06:22:10,513 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c401e4603/40d5fab609e648748a18fcde599e9c35/FLAG2256c2fbc [2020-10-20 06:22:10,984 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 06:22:10,985 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/NestedRecursion_2a.c [2020-10-20 06:22:10,990 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c401e4603/40d5fab609e648748a18fcde599e9c35/FLAG2256c2fbc [2020-10-20 06:22:11,381 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c401e4603/40d5fab609e648748a18fcde599e9c35 [2020-10-20 06:22:11,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 06:22:11,394 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 06:22:11,398 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 06:22:11,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 06:22:11,402 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 06:22:11,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:22:11" (1/1) ... [2020-10-20 06:22:11,407 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@640db65e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:22:11, skipping insertion in model container [2020-10-20 06:22:11,407 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:22:11" (1/1) ... [2020-10-20 06:22:11,416 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 06:22:11,434 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:22:11,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:22:11,614 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 06:22:11,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:22:11,656 INFO L208 MainTranslator]: Completed translation [2020-10-20 06:22:11,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:22:11 WrapperNode [2020-10-20 06:22:11,658 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 06:22:11,659 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 06:22:11,659 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 06:22:11,659 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 06:22:11,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:22:11" (1/1) ... [2020-10-20 06:22:11,675 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:22:11" (1/1) ... [2020-10-20 06:22:11,695 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 06:22:11,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 06:22:11,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 06:22:11,698 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 06:22:11,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:22:11" (1/1) ... [2020-10-20 06:22:11,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:22:11" (1/1) ... [2020-10-20 06:22:11,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:22:11" (1/1) ... [2020-10-20 06:22:11,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:22:11" (1/1) ... [2020-10-20 06:22:11,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:22:11" (1/1) ... [2020-10-20 06:22:11,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:22:11" (1/1) ... [2020-10-20 06:22:11,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:22:11" (1/1) ... [2020-10-20 06:22:11,723 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 06:22:11,724 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 06:22:11,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 06:22:11,724 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 06:22:11,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:22:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 06:22:11,802 INFO L130 BoogieDeclarations]: Found specification of procedure g [2020-10-20 06:22:11,803 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2020-10-20 06:22:11,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 06:22:11,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 06:22:11,971 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 06:22:11,972 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-20 06:22:11,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:22:11 BoogieIcfgContainer [2020-10-20 06:22:11,974 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 06:22:11,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 06:22:11,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 06:22:11,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 06:22:11,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:22:11" (1/3) ... [2020-10-20 06:22:11,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49e26fc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:22:11, skipping insertion in model container [2020-10-20 06:22:11,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:22:11" (2/3) ... [2020-10-20 06:22:11,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49e26fc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:22:11, skipping insertion in model container [2020-10-20 06:22:11,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:22:11" (3/3) ... [2020-10-20 06:22:11,982 INFO L111 eAbstractionObserver]: Analyzing ICFG NestedRecursion_2a.c [2020-10-20 06:22:11,994 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 06:22:12,001 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-20 06:22:12,016 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-20 06:22:12,051 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 06:22:12,052 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 06:22:12,052 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 06:22:12,052 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 06:22:12,052 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 06:22:12,052 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 06:22:12,052 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 06:22:12,053 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 06:22:12,069 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-20 06:22:12,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-10-20 06:22:12,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:22:12,075 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-10-20 06:22:12,075 INFO L429 AbstractCegarLoop]: === Iteration 1 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:22:12,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:22:12,081 INFO L82 PathProgramCache]: Analyzing trace with hash 43226870, now seen corresponding path program 1 times [2020-10-20 06:22:12,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:22:12,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135329718] [2020-10-20 06:22:12,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:22:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:22:12,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:22:12,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135329718] [2020-10-20 06:22:12,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:22:12,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 06:22:12,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258778951] [2020-10-20 06:22:12,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 06:22:12,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:22:12,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 06:22:12,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:22:12,290 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2020-10-20 06:22:12,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:22:12,438 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2020-10-20 06:22:12,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 06:22:12,440 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-10-20 06:22:12,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:22:12,452 INFO L225 Difference]: With dead ends: 32 [2020-10-20 06:22:12,453 INFO L226 Difference]: Without dead ends: 27 [2020-10-20 06:22:12,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 06:22:12,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-20 06:22:12,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-10-20 06:22:12,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-20 06:22:12,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-10-20 06:22:12,498 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 5 [2020-10-20 06:22:12,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:22:12,499 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-10-20 06:22:12,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 06:22:12,499 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-10-20 06:22:12,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-20 06:22:12,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:22:12,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-20 06:22:12,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 06:22:12,501 INFO L429 AbstractCegarLoop]: === Iteration 2 === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:22:12,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:22:12,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1340033008, now seen corresponding path program 1 times [2020-10-20 06:22:12,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:22:12,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290573125] [2020-10-20 06:22:12,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:22:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:22:12,511 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:22:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:22:12,518 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:22:12,534 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:22:12,535 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 06:22:12,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 06:22:12,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:22:12 BoogieIcfgContainer [2020-10-20 06:22:12,558 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 06:22:12,559 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 06:22:12,559 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 06:22:12,559 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 06:22:12,560 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:22:11" (3/4) ... [2020-10-20 06:22:12,562 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 06:22:12,600 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 06:22:12,600 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 06:22:12,603 INFO L168 Benchmark]: Toolchain (without parser) took 1214.73 ms. Allocated memory was 41.9 MB in the beginning and 45.1 MB in the end (delta: 3.1 MB). Free memory was 21.5 MB in the beginning and 13.9 MB in the end (delta: 7.5 MB). Peak memory consumption was 10.7 MB. Max. memory is 14.3 GB. [2020-10-20 06:22:12,604 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 32.0 MB. Free memory was 9.7 MB in the beginning and 9.6 MB in the end (delta: 47.6 kB). Peak memory consumption was 47.6 kB. Max. memory is 14.3 GB. [2020-10-20 06:22:12,605 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.65 ms. Allocated memory was 41.9 MB in the beginning and 42.5 MB in the end (delta: 524.3 kB). Free memory was 20.6 MB in the beginning and 24.2 MB in the end (delta: -3.6 MB). Peak memory consumption was 12.3 MB. Max. memory is 14.3 GB. [2020-10-20 06:22:12,606 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.39 ms. Allocated memory is still 42.5 MB. Free memory was 24.0 MB in the beginning and 22.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. [2020-10-20 06:22:12,607 INFO L168 Benchmark]: Boogie Preprocessor took 26.02 ms. Allocated memory is still 42.5 MB. Free memory was 22.7 MB in the beginning and 21.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 14.3 GB. [2020-10-20 06:22:12,607 INFO L168 Benchmark]: RCFGBuilder took 249.81 ms. Allocated memory is still 42.5 MB. Free memory was 21.5 MB in the beginning and 11.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 14.3 GB. [2020-10-20 06:22:12,608 INFO L168 Benchmark]: TraceAbstraction took 583.63 ms. Allocated memory was 42.5 MB in the beginning and 45.1 MB in the end (delta: 2.6 MB). Free memory was 11.5 MB in the beginning and 15.9 MB in the end (delta: -4.4 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 06:22:12,609 INFO L168 Benchmark]: Witness Printer took 41.36 ms. Allocated memory is still 45.1 MB. Free memory was 15.9 MB in the beginning and 13.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. [2020-10-20 06:22:12,615 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 32.0 MB. Free memory was 9.7 MB in the beginning and 9.6 MB in the end (delta: 47.6 kB). Peak memory consumption was 47.6 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 260.65 ms. Allocated memory was 41.9 MB in the beginning and 42.5 MB in the end (delta: 524.3 kB). Free memory was 20.6 MB in the beginning and 24.2 MB in the end (delta: -3.6 MB). Peak memory consumption was 12.3 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 37.39 ms. Allocated memory is still 42.5 MB. Free memory was 24.0 MB in the beginning and 22.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 26.02 ms. Allocated memory is still 42.5 MB. Free memory was 22.7 MB in the beginning and 21.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 14.3 GB. * RCFGBuilder took 249.81 ms. Allocated memory is still 42.5 MB. Free memory was 21.5 MB in the beginning and 11.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 14.3 GB. * TraceAbstraction took 583.63 ms. Allocated memory was 42.5 MB in the beginning and 45.1 MB in the end (delta: 2.6 MB). Free memory was 11.5 MB in the beginning and 15.9 MB in the end (delta: -4.4 MB). There was no memory consumed. Max. memory is 14.3 GB. * Witness Printer took 41.36 ms. Allocated memory is still 45.1 MB. Free memory was 15.9 MB in the beginning and 13.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: integer overflow possible integer overflow possible We found a FailurePath: [L19] int x = __VERIFIER_nondet_int(); [L20] CALL g(x) VAL [\old(x)=-2147483648] [L12] COND FALSE !(x == 0) VAL [\old(x)=-2147483648, x=-2147483648] [L15] x - 1 VAL [\old(x)=-2147483648, x=-2147483648] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 20 SDslu, 33 SDs, 0 SdLazy, 29 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=1, 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, 1 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 48 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...