./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex2.16.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-Ex2.16.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 dadda19c56de835988eee8d19bbc724946613e79 .................................................................................................................................................................................................................................................................. 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 06:24:44,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 06:24:44,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 06:24:44,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 06:24:44,655 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 06:24:44,656 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 06:24:44,657 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 06:24:44,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 06:24:44,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 06:24:44,662 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 06:24:44,663 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 06:24:44,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 06:24:44,665 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 06:24:44,666 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 06:24:44,667 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 06:24:44,668 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 06:24:44,669 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 06:24:44,670 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 06:24:44,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 06:24:44,673 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 06:24:44,675 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 06:24:44,676 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 06:24:44,677 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 06:24:44,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 06:24:44,690 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 06:24:44,690 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 06:24:44,690 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 06:24:44,694 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 06:24:44,694 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 06:24:44,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 06:24:44,695 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 06:24:44,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 06:24:44,697 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 06:24:44,697 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 06:24:44,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 06:24:44,699 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 06:24:44,699 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 06:24:44,699 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 06:24:44,700 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 06:24:44,708 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 06:24:44,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 06:24:44,710 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2020-10-20 06:24:44,748 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 06:24:44,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 06:24:44,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 06:24:44,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 06:24:44,751 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 06:24:44,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 06:24:44,752 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 06:24:44,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 06:24:44,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 06:24:44,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 06:24:44,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 06:24:44,754 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 06:24:44,754 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-10-20 06:24:44,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 06:24:44,754 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 06:24:44,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 06:24:44,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 06:24:44,756 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 06:24:44,756 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 06:24:44,756 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 06:24:44,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 06:24:44,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 06:24:44,757 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 06:24:44,757 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 06:24:44,757 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 06:24:44,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 06:24:44,758 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 06:24:44,758 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 06:24:44,758 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 -> dadda19c56de835988eee8d19bbc724946613e79 [2020-10-20 06:24:44,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 06:24:45,009 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 06:24:45,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 06:24:45,014 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 06:24:45,015 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 06:24:45,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex2.16.c [2020-10-20 06:24:45,098 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/851730808/abad1ec45d9f4912a4c592e13b694555/FLAG9b4a47ae7 [2020-10-20 06:24:45,523 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 06:24:45,524 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex2.16.c [2020-10-20 06:24:45,530 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/851730808/abad1ec45d9f4912a4c592e13b694555/FLAG9b4a47ae7 [2020-10-20 06:24:45,916 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/851730808/abad1ec45d9f4912a4c592e13b694555 [2020-10-20 06:24:45,919 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 06:24:45,925 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 06:24:45,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 06:24:45,927 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 06:24:45,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 06:24:45,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:24:45" (1/1) ... [2020-10-20 06:24:45,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c4668db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:24:45, skipping insertion in model container [2020-10-20 06:24:45,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:24:45" (1/1) ... [2020-10-20 06:24:45,944 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 06:24:45,965 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:24:46,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:24:46,265 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 06:24:46,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:24:46,290 INFO L208 MainTranslator]: Completed translation [2020-10-20 06:24:46,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:24:46 WrapperNode [2020-10-20 06:24:46,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 06:24:46,292 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 06:24:46,292 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 06:24:46,292 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 06:24:46,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:24:46" (1/1) ... [2020-10-20 06:24:46,304 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:24:46" (1/1) ... [2020-10-20 06:24:46,320 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 06:24:46,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 06:24:46,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 06:24:46,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 06:24:46,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:24:46" (1/1) ... [2020-10-20 06:24:46,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:24:46" (1/1) ... [2020-10-20 06:24:46,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:24:46" (1/1) ... [2020-10-20 06:24:46,332 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:24:46" (1/1) ... [2020-10-20 06:24:46,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:24:46" (1/1) ... [2020-10-20 06:24:46,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:24:46" (1/1) ... [2020-10-20 06:24:46,339 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:24:46" (1/1) ... [2020-10-20 06:24:46,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 06:24:46,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 06:24:46,341 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 06:24:46,341 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 06:24:46,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:24:46" (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 06:24:46,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 06:24:46,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 06:24:46,557 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 06:24:46,557 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-20 06:24:46,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:24:46 BoogieIcfgContainer [2020-10-20 06:24:46,559 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 06:24:46,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 06:24:46,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 06:24:46,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 06:24:46,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:24:45" (1/3) ... [2020-10-20 06:24:46,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b48295b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:24:46, skipping insertion in model container [2020-10-20 06:24:46,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:24:46" (2/3) ... [2020-10-20 06:24:46,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b48295b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:24:46, skipping insertion in model container [2020-10-20 06:24:46,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:24:46" (3/3) ... [2020-10-20 06:24:46,566 INFO L111 eAbstractionObserver]: Analyzing ICFG ChenFlurMukhopadhyay-SAS2012-Ex2.16.c [2020-10-20 06:24:46,575 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 06:24:46,581 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-20 06:24:46,594 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-20 06:24:46,614 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 06:24:46,614 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 06:24:46,614 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 06:24:46,615 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 06:24:46,615 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 06:24:46,615 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 06:24:46,615 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 06:24:46,615 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 06:24:46,626 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2020-10-20 06:24:46,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-10-20 06:24:46,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:24:46,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-10-20 06:24:46,632 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:24:46,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:24:46,638 INFO L82 PathProgramCache]: Analyzing trace with hash 31073, now seen corresponding path program 1 times [2020-10-20 06:24:46,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:24:46,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861776228] [2020-10-20 06:24:46,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:24:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:24:46,776 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 06:24:46,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861776228] [2020-10-20 06:24:46,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:24:46,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-10-20 06:24:46,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611015682] [2020-10-20 06:24:46,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 06:24:46,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:24:46,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 06:24:46,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:24:46,795 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2020-10-20 06:24:46,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:24:46,835 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-10-20 06:24:46,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 06:24:46,837 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-10-20 06:24:46,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:24:46,847 INFO L225 Difference]: With dead ends: 14 [2020-10-20 06:24:46,848 INFO L226 Difference]: Without dead ends: 5 [2020-10-20 06:24:46,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:24:46,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2020-10-20 06:24:46,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2020-10-20 06:24:46,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-20 06:24:46,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2020-10-20 06:24:46,900 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2020-10-20 06:24:46,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:24:46,900 INFO L481 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2020-10-20 06:24:46,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 06:24:46,901 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2020-10-20 06:24:46,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-20 06:24:46,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:24:46,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-20 06:24:46,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 06:24:46,907 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:24:46,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:24:46,908 INFO L82 PathProgramCache]: Analyzing trace with hash 963307, now seen corresponding path program 1 times [2020-10-20 06:24:46,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:24:46,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298138474] [2020-10-20 06:24:46,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:24:46,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:24:46,923 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:24:46,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:24:46,930 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:24:46,950 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:24:46,950 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 06:24:46,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 06:24:46,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:24:46 BoogieIcfgContainer [2020-10-20 06:24:46,970 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 06:24:46,971 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 06:24:46,971 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 06:24:46,972 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 06:24:46,972 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:24:46" (3/4) ... [2020-10-20 06:24:46,975 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 06:24:47,011 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 06:24:47,011 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 06:24:47,014 INFO L168 Benchmark]: Toolchain (without parser) took 1092.84 ms. Allocated memory was 35.7 MB in the beginning and 46.7 MB in the end (delta: 11.0 MB). Free memory was 15.8 MB in the beginning and 16.5 MB in the end (delta: -654.6 kB). Peak memory consumption was 10.4 MB. Max. memory is 14.3 GB. [2020-10-20 06:24:47,015 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 34.1 MB. Free memory was 10.6 MB in the beginning and 10.6 MB in the end (delta: 43.6 kB). Peak memory consumption was 43.6 kB. Max. memory is 14.3 GB. [2020-10-20 06:24:47,016 INFO L168 Benchmark]: CACSL2BoogieTranslator took 364.83 ms. Allocated memory was 35.7 MB in the beginning and 44.6 MB in the end (delta: 8.9 MB). Free memory was 15.0 MB in the beginning and 27.2 MB in the end (delta: -12.2 MB). Peak memory consumption was 10.4 MB. Max. memory is 14.3 GB. [2020-10-20 06:24:47,017 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.96 ms. Allocated memory is still 44.6 MB. Free memory was 27.2 MB in the beginning and 25.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-20 06:24:47,017 INFO L168 Benchmark]: Boogie Preprocessor took 19.39 ms. Allocated memory is still 44.6 MB. Free memory was 25.7 MB in the beginning and 24.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. [2020-10-20 06:24:47,018 INFO L168 Benchmark]: RCFGBuilder took 218.53 ms. Allocated memory was 44.6 MB in the beginning and 46.7 MB in the end (delta: 2.1 MB). Free memory was 24.5 MB in the beginning and 27.1 MB in the end (delta: -2.6 MB). Peak memory consumption was 12.1 MB. Max. memory is 14.3 GB. [2020-10-20 06:24:47,019 INFO L168 Benchmark]: TraceAbstraction took 410.81 ms. Allocated memory is still 46.7 MB. Free memory was 26.7 MB in the beginning and 18.3 MB in the end (delta: 8.3 MB). Peak memory consumption was 8.3 MB. Max. memory is 14.3 GB. [2020-10-20 06:24:47,020 INFO L168 Benchmark]: Witness Printer took 40.55 ms. Allocated memory is still 46.7 MB. Free memory was 18.3 MB in the beginning and 16.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. [2020-10-20 06:24:47,027 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 34.1 MB. Free memory was 10.6 MB in the beginning and 10.6 MB in the end (delta: 43.6 kB). Peak memory consumption was 43.6 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 364.83 ms. Allocated memory was 35.7 MB in the beginning and 44.6 MB in the end (delta: 8.9 MB). Free memory was 15.0 MB in the beginning and 27.2 MB in the end (delta: -12.2 MB). Peak memory consumption was 10.4 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 28.96 ms. Allocated memory is still 44.6 MB. Free memory was 27.2 MB in the beginning and 25.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 19.39 ms. Allocated memory is still 44.6 MB. Free memory was 25.7 MB in the beginning and 24.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 218.53 ms. Allocated memory was 44.6 MB in the beginning and 46.7 MB in the end (delta: 2.1 MB). Free memory was 24.5 MB in the beginning and 27.1 MB in the end (delta: -2.6 MB). Peak memory consumption was 12.1 MB. Max. memory is 14.3 GB. * TraceAbstraction took 410.81 ms. Allocated memory is still 46.7 MB. Free memory was 26.7 MB in the beginning and 18.3 MB in the end (delta: 8.3 MB). Peak memory consumption was 8.3 MB. Max. memory is 14.3 GB. * Witness Printer took 40.55 ms. Allocated memory is still 46.7 MB. Free memory was 18.3 MB in the beginning and 16.5 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: 28]: 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 [L28] y - 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 5 SDtfs, 6 SDslu, 0 SDs, 0 SdLazy, 4 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred 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, 12 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...