./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex2.02.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-lit/ChenFlurMukhopadhyay-SAS2012-Ex2.02.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 2a919b25da354c99a27159953a248cd7db9b3c80 ................................................................................................................................................................................................................................................................. 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 06:24:29,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 06:24:29,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 06:24:29,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 06:24:29,681 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 06:24:29,690 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 06:24:29,692 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 06:24:29,695 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 06:24:29,697 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 06:24:29,700 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 06:24:29,701 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 06:24:29,702 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 06:24:29,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 06:24:29,706 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 06:24:29,707 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 06:24:29,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 06:24:29,711 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 06:24:29,712 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 06:24:29,715 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 06:24:29,720 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 06:24:29,723 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 06:24:29,725 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 06:24:29,727 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 06:24:29,728 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 06:24:29,738 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 06:24:29,738 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 06:24:29,739 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 06:24:29,741 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 06:24:29,742 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 06:24:29,743 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 06:24:29,743 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 06:24:29,743 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 06:24:29,746 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 06:24:29,747 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 06:24:29,748 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 06:24:29,748 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 06:24:29,749 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 06:24:29,749 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 06:24:29,749 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 06:24:29,751 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 06:24:29,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 06:24:29,753 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2020-10-20 06:24:29,796 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 06:24:29,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 06:24:29,799 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 06:24:29,799 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 06:24:29,799 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 06:24:29,800 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 06:24:29,800 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 06:24:29,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 06:24:29,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 06:24:29,800 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 06:24:29,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 06:24:29,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 06:24:29,802 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-10-20 06:24:29,802 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 06:24:29,802 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 06:24:29,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 06:24:29,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 06:24:29,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 06:24:29,804 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 06:24:29,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 06:24:29,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 06:24:29,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 06:24:29,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 06:24:29,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 06:24:29,805 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 06:24:29,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 06:24:29,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 06:24:29,805 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 06:24:29,805 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 -> 2a919b25da354c99a27159953a248cd7db9b3c80 [2020-10-20 06:24:30,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 06:24:30,031 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 06:24:30,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 06:24:30,039 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 06:24:30,040 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 06:24:30,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex2.02.c [2020-10-20 06:24:30,119 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5de4c039c/d317337f1b11489fb9ca848f644e84af/FLAG112c79774 [2020-10-20 06:24:30,577 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 06:24:30,578 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex2.02.c [2020-10-20 06:24:30,585 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5de4c039c/d317337f1b11489fb9ca848f644e84af/FLAG112c79774 [2020-10-20 06:24:30,956 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5de4c039c/d317337f1b11489fb9ca848f644e84af [2020-10-20 06:24:30,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 06:24:30,967 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 06:24:30,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 06:24:30,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 06:24:30,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 06:24:30,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:24:30" (1/1) ... [2020-10-20 06:24:30,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27f17c64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:24:30, skipping insertion in model container [2020-10-20 06:24:30,978 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:24:30" (1/1) ... [2020-10-20 06:24:30,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 06:24:31,017 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:24:31,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:24:31,280 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 06:24:31,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:24:31,309 INFO L208 MainTranslator]: Completed translation [2020-10-20 06:24:31,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:24:31 WrapperNode [2020-10-20 06:24:31,310 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 06:24:31,311 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 06:24:31,311 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 06:24:31,311 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 06:24:31,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:24:31" (1/1) ... [2020-10-20 06:24:31,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:24:31" (1/1) ... [2020-10-20 06:24:31,339 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 06:24:31,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 06:24:31,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 06:24:31,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 06:24:31,347 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:24:31" (1/1) ... [2020-10-20 06:24:31,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:24:31" (1/1) ... [2020-10-20 06:24:31,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:24:31" (1/1) ... [2020-10-20 06:24:31,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:24:31" (1/1) ... [2020-10-20 06:24:31,349 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:24:31" (1/1) ... [2020-10-20 06:24:31,353 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:24:31" (1/1) ... [2020-10-20 06:24:31,354 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:24:31" (1/1) ... [2020-10-20 06:24:31,355 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 06:24:31,356 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 06:24:31,356 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 06:24:31,356 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 06:24:31,357 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:24:31" (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 06:24:31,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 06:24:31,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 06:24:31,597 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 06:24:31,598 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-20 06:24:31,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:24:31 BoogieIcfgContainer [2020-10-20 06:24:31,599 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 06:24:31,601 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 06:24:31,601 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 06:24:31,604 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 06:24:31,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:24:30" (1/3) ... [2020-10-20 06:24:31,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a7fd5cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:24:31, skipping insertion in model container [2020-10-20 06:24:31,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:24:31" (2/3) ... [2020-10-20 06:24:31,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a7fd5cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:24:31, skipping insertion in model container [2020-10-20 06:24:31,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:24:31" (3/3) ... [2020-10-20 06:24:31,608 INFO L111 eAbstractionObserver]: Analyzing ICFG ChenFlurMukhopadhyay-SAS2012-Ex2.02.c [2020-10-20 06:24:31,620 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 06:24:31,627 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-10-20 06:24:31,645 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-20 06:24:31,670 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 06:24:31,670 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 06:24:31,671 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 06:24:31,671 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 06:24:31,671 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 06:24:31,671 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 06:24:31,671 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 06:24:31,671 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 06:24:31,686 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-10-20 06:24:31,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-10-20 06:24:31,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:24:31,694 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-10-20 06:24:31,694 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:24:31,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:24:31,700 INFO L82 PathProgramCache]: Analyzing trace with hash 31073, now seen corresponding path program 1 times [2020-10-20 06:24:31,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:24:31,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864341062] [2020-10-20 06:24:31,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:24:31,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:24:31,894 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 06:24:31,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864341062] [2020-10-20 06:24:31,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:24:31,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 06:24:31,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259376287] [2020-10-20 06:24:31,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:24:31,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:24:31,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:24:31,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:24:31,924 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 4 states. [2020-10-20 06:24:32,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:24:32,005 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-10-20 06:24:32,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:24:32,007 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2020-10-20 06:24:32,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:24:32,019 INFO L225 Difference]: With dead ends: 18 [2020-10-20 06:24:32,020 INFO L226 Difference]: Without dead ends: 8 [2020-10-20 06:24:32,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:24:32,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-10-20 06:24:32,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-10-20 06:24:32,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 06:24:32,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-10-20 06:24:32,066 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 3 [2020-10-20 06:24:32,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:24:32,067 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-10-20 06:24:32,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:24:32,067 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-10-20 06:24:32,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-20 06:24:32,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:24:32,068 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-20 06:24:32,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 06:24:32,069 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:24:32,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:24:32,070 INFO L82 PathProgramCache]: Analyzing trace with hash 963307, now seen corresponding path program 1 times [2020-10-20 06:24:32,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:24:32,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880124515] [2020-10-20 06:24:32,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:24:32,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:24:32,081 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:24:32,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:24:32,092 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:24:32,110 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:24:32,111 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 06:24:32,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 06:24:32,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:24:32 BoogieIcfgContainer [2020-10-20 06:24:32,136 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 06:24:32,137 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 06:24:32,137 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 06:24:32,137 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 06:24:32,138 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:24:31" (3/4) ... [2020-10-20 06:24:32,140 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 06:24:32,181 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 06:24:32,182 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 06:24:32,184 INFO L168 Benchmark]: Toolchain (without parser) took 1222.16 ms. Allocated memory was 30.9 MB in the beginning and 45.6 MB in the end (delta: 14.7 MB). Free memory was 6.8 MB in the beginning and 26.8 MB in the end (delta: -20.0 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 06:24:32,186 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 30.9 MB. Free memory was 11.5 MB in the beginning and 11.4 MB in the end (delta: 43.5 kB). Peak memory consumption was 43.5 kB. Max. memory is 14.3 GB. [2020-10-20 06:24:32,187 INFO L168 Benchmark]: CACSL2BoogieTranslator took 342.60 ms. Allocated memory was 30.9 MB in the beginning and 40.4 MB in the end (delta: 9.4 MB). Free memory was 5.9 MB in the beginning and 19.8 MB in the end (delta: -13.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 14.3 GB. [2020-10-20 06:24:32,188 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.97 ms. Allocated memory is still 40.4 MB. Free memory was 19.8 MB in the beginning and 18.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. [2020-10-20 06:24:32,188 INFO L168 Benchmark]: Boogie Preprocessor took 16.09 ms. Allocated memory is still 40.4 MB. Free memory was 18.3 MB in the beginning and 17.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. [2020-10-20 06:24:32,189 INFO L168 Benchmark]: RCFGBuilder took 244.00 ms. Allocated memory was 40.4 MB in the beginning and 43.0 MB in the end (delta: 2.6 MB). Free memory was 17.1 MB in the beginning and 20.3 MB in the end (delta: -3.2 MB). Peak memory consumption was 6.4 MB. Max. memory is 14.3 GB. [2020-10-20 06:24:32,190 INFO L168 Benchmark]: TraceAbstraction took 535.62 ms. Allocated memory was 43.0 MB in the beginning and 45.6 MB in the end (delta: 2.6 MB). Free memory was 19.9 MB in the beginning and 28.5 MB in the end (delta: -8.6 MB). Peak memory consumption was 10.7 MB. Max. memory is 14.3 GB. [2020-10-20 06:24:32,191 INFO L168 Benchmark]: Witness Printer took 45.00 ms. Allocated memory is still 45.6 MB. Free memory was 28.5 MB in the beginning and 26.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-20 06:24:32,196 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 30.9 MB. Free memory was 11.5 MB in the beginning and 11.4 MB in the end (delta: 43.5 kB). Peak memory consumption was 43.5 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 342.60 ms. Allocated memory was 30.9 MB in the beginning and 40.4 MB in the end (delta: 9.4 MB). Free memory was 5.9 MB in the beginning and 19.8 MB in the end (delta: -13.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 27.97 ms. Allocated memory is still 40.4 MB. Free memory was 19.8 MB in the beginning and 18.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 16.09 ms. Allocated memory is still 40.4 MB. Free memory was 18.3 MB in the beginning and 17.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. * RCFGBuilder took 244.00 ms. Allocated memory was 40.4 MB in the beginning and 43.0 MB in the end (delta: 2.6 MB). Free memory was 17.1 MB in the beginning and 20.3 MB in the end (delta: -3.2 MB). Peak memory consumption was 6.4 MB. Max. memory is 14.3 GB. * TraceAbstraction took 535.62 ms. Allocated memory was 43.0 MB in the beginning and 45.6 MB in the end (delta: 2.6 MB). Free memory was 19.9 MB in the beginning and 28.5 MB in the end (delta: -8.6 MB). Peak memory consumption was 10.7 MB. Max. memory is 14.3 GB. * Witness Printer took 45.00 ms. Allocated memory is still 45.6 MB. Free memory was 28.5 MB in the beginning and 26.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 27]: integer overflow possible integer overflow possible We found a FailurePath: [L23] int x, y; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L26] COND TRUE x < 0 [L27] x + y - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 4 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: 6 SDtfs, 11 SDslu, 3 SDs, 0 SdLazy, 12 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 7 NumberOfCodeBlocks, 7 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 2 ConstructedInterpolants, 0 QuantifiedInterpolants, 16 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...