./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/signedintegeroverflow-regression/PostfixDecrement.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e19ca921 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_1.5.800.v20200727-1323.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/signedintegeroverflow-regression/PostfixDecrement.i -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 cf935d06d6f7dfd4eb46d60fc84761bc54bea2a55591f71dc04a00264afa48b1 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 19:23:43,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 19:23:43,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 19:23:43,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 19:23:43,427 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 19:23:43,431 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 19:23:43,433 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 19:23:43,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 19:23:43,438 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 19:23:43,443 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 19:23:43,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 19:23:43,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 19:23:43,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 19:23:43,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 19:23:43,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 19:23:43,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 19:23:43,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 19:23:43,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 19:23:43,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 19:23:43,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 19:23:43,463 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 19:23:43,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 19:23:43,466 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 19:23:43,467 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 19:23:43,471 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 19:23:43,471 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 19:23:43,471 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 19:23:43,473 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 19:23:43,473 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 19:23:43,474 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 19:23:43,475 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 19:23:43,476 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 19:23:43,477 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 19:23:43,478 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 19:23:43,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 19:23:43,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 19:23:43,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 19:23:43,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 19:23:43,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 19:23:43,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 19:23:43,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 19:23:43,483 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2021-12-22 19:23:43,506 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 19:23:43,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 19:23:43,507 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 19:23:43,507 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 19:23:43,508 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 19:23:43,508 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 19:23:43,508 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 19:23:43,508 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 19:23:43,508 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 19:23:43,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 19:23:43,509 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 19:23:43,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 19:23:43,509 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 19:23:43,509 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 19:23:43,509 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 19:23:43,509 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 19:23:43,510 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-12-22 19:23:43,510 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 19:23:43,510 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 19:23:43,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 19:23:43,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 19:23:43,510 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 19:23:43,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 19:23:43,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 19:23:43,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 19:23:43,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 19:23:43,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 19:23:43,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 19:23:43,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 19:23:43,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 19:23:43,512 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 19:23:43,512 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cf935d06d6f7dfd4eb46d60fc84761bc54bea2a55591f71dc04a00264afa48b1 [2021-12-22 19:23:43,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 19:23:43,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 19:23:43,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 19:23:43,769 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 19:23:43,770 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 19:23:43,771 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/signedintegeroverflow-regression/PostfixDecrement.i [2021-12-22 19:23:43,830 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/189b66e2f/49cca30d03274711acce48b493f7b16f/FLAGc7f001e64 [2021-12-22 19:23:44,268 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 19:23:44,269 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/signedintegeroverflow-regression/PostfixDecrement.i [2021-12-22 19:23:44,280 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/189b66e2f/49cca30d03274711acce48b493f7b16f/FLAGc7f001e64 [2021-12-22 19:23:44,294 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/189b66e2f/49cca30d03274711acce48b493f7b16f [2021-12-22 19:23:44,296 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 19:23:44,297 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 19:23:44,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 19:23:44,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 19:23:44,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 19:23:44,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:23:44" (1/1) ... [2021-12-22 19:23:44,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@239369de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:44, skipping insertion in model container [2021-12-22 19:23:44,309 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:23:44" (1/1) ... [2021-12-22 19:23:44,315 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 19:23:44,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 19:23:44,602 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:23:44,612 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 19:23:44,642 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:23:44,667 INFO L208 MainTranslator]: Completed translation [2021-12-22 19:23:44,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:44 WrapperNode [2021-12-22 19:23:44,668 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 19:23:44,669 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 19:23:44,669 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 19:23:44,669 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 19:23:44,677 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:44" (1/1) ... [2021-12-22 19:23:44,694 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:44" (1/1) ... [2021-12-22 19:23:44,711 INFO L137 Inliner]: procedures = 109, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2021-12-22 19:23:44,711 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 19:23:44,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 19:23:44,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 19:23:44,713 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 19:23:44,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:44" (1/1) ... [2021-12-22 19:23:44,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:44" (1/1) ... [2021-12-22 19:23:44,725 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:44" (1/1) ... [2021-12-22 19:23:44,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:44" (1/1) ... [2021-12-22 19:23:44,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:44" (1/1) ... [2021-12-22 19:23:44,736 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:44" (1/1) ... [2021-12-22 19:23:44,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:44" (1/1) ... [2021-12-22 19:23:44,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 19:23:44,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 19:23:44,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 19:23:44,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 19:23:44,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:44" (1/1) ... [2021-12-22 19:23:44,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 19:23:44,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:23:44,776 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 19:23:44,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 19:23:44,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 19:23:44,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 19:23:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 19:23:44,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 19:23:44,907 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 19:23:44,908 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 19:23:44,957 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 19:23:44,962 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 19:23:44,962 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 19:23:44,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:23:44 BoogieIcfgContainer [2021-12-22 19:23:44,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 19:23:44,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 19:23:44,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 19:23:44,969 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 19:23:44,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:23:44" (1/3) ... [2021-12-22 19:23:44,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e2aa708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:23:44, skipping insertion in model container [2021-12-22 19:23:44,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:23:44" (2/3) ... [2021-12-22 19:23:44,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e2aa708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:23:44, skipping insertion in model container [2021-12-22 19:23:44,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:23:44" (3/3) ... [2021-12-22 19:23:44,973 INFO L111 eAbstractionObserver]: Analyzing ICFG PostfixDecrement.i [2021-12-22 19:23:44,976 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 19:23:44,976 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-22 19:23:45,025 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 19:23:45,034 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 19:23:45,035 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 19:23:45,046 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 8 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:23:45,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-12-22 19:23:45,055 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:23:45,055 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-12-22 19:23:45,056 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-22 19:23:45,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:23:45,067 INFO L85 PathProgramCache]: Analyzing trace with hash 29856, now seen corresponding path program 1 times [2021-12-22 19:23:45,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:23:45,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185051664] [2021-12-22 19:23:45,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:23:45,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:23:45,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:23:45,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:23:45,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:23:45,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185051664] [2021-12-22 19:23:45,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185051664] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:23:45,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:23:45,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 19:23:45,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696768390] [2021-12-22 19:23:45,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:23:45,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:23:45,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:23:45,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:23:45,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:23:45,302 INFO L87 Difference]: Start difference. First operand has 9 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 8 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:23:45,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:23:45,346 INFO L93 Difference]: Finished difference Result 9 states and 8 transitions. [2021-12-22 19:23:45,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:23:45,348 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-12-22 19:23:45,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:23:45,353 INFO L225 Difference]: With dead ends: 9 [2021-12-22 19:23:45,354 INFO L226 Difference]: Without dead ends: 5 [2021-12-22 19:23:45,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:23:45,361 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:23:45,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:23:45,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2021-12-22 19:23:45,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2021-12-22 19:23:45,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:23:45,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 4 transitions. [2021-12-22 19:23:45,385 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 4 transitions. Word has length 3 [2021-12-22 19:23:45,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:23:45,385 INFO L470 AbstractCegarLoop]: Abstraction has 5 states and 4 transitions. [2021-12-22 19:23:45,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:23:45,385 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 4 transitions. [2021-12-22 19:23:45,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-22 19:23:45,386 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:23:45,386 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-22 19:23:45,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 19:23:45,386 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-22 19:23:45,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:23:45,387 INFO L85 PathProgramCache]: Analyzing trace with hash 925572, now seen corresponding path program 1 times [2021-12-22 19:23:45,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:23:45,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168231235] [2021-12-22 19:23:45,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:23:45,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:23:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:23:45,400 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-22 19:23:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-22 19:23:45,429 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-22 19:23:45,430 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-22 19:23:45,431 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 2 remaining) [2021-12-22 19:23:45,433 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 2 remaining) [2021-12-22 19:23:45,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 19:23:45,436 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-12-22 19:23:45,439 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-22 19:23:45,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 07:23:45 BoogieIcfgContainer [2021-12-22 19:23:45,464 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-22 19:23:45,466 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-22 19:23:45,466 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-22 19:23:45,467 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-22 19:23:45,467 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:23:44" (3/4) ... [2021-12-22 19:23:45,471 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-22 19:23:45,490 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-22 19:23:45,491 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-22 19:23:45,492 INFO L158 Benchmark]: Toolchain (without parser) took 1194.09ms. Allocated memory was 90.2MB in the beginning and 111.1MB in the end (delta: 21.0MB). Free memory was 58.5MB in the beginning and 48.3MB in the end (delta: 10.2MB). Peak memory consumption was 28.6MB. Max. memory is 16.1GB. [2021-12-22 19:23:45,492 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 90.2MB. Free memory is still 47.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 19:23:45,492 INFO L158 Benchmark]: CACSL2BoogieTranslator took 363.57ms. Allocated memory was 90.2MB in the beginning and 111.1MB in the end (delta: 21.0MB). Free memory was 58.2MB in the beginning and 83.8MB in the end (delta: -25.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 19:23:45,493 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.94ms. Allocated memory is still 111.1MB. Free memory was 83.8MB in the beginning and 82.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 19:23:45,493 INFO L158 Benchmark]: Boogie Preprocessor took 29.50ms. Allocated memory is still 111.1MB. Free memory was 82.4MB in the beginning and 81.6MB in the end (delta: 819.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 19:23:45,494 INFO L158 Benchmark]: RCFGBuilder took 220.97ms. Allocated memory is still 111.1MB. Free memory was 81.0MB in the beginning and 73.2MB in the end (delta: 7.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-22 19:23:45,494 INFO L158 Benchmark]: TraceAbstraction took 499.16ms. Allocated memory is still 111.1MB. Free memory was 72.6MB in the beginning and 49.5MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2021-12-22 19:23:45,495 INFO L158 Benchmark]: Witness Printer took 24.74ms. Allocated memory is still 111.1MB. Free memory was 49.5MB in the beginning and 48.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 19:23:45,497 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 90.2MB. Free memory is still 47.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 363.57ms. Allocated memory was 90.2MB in the beginning and 111.1MB in the end (delta: 21.0MB). Free memory was 58.2MB in the beginning and 83.8MB in the end (delta: -25.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.94ms. Allocated memory is still 111.1MB. Free memory was 83.8MB in the beginning and 82.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.50ms. Allocated memory is still 111.1MB. Free memory was 82.4MB in the beginning and 81.6MB in the end (delta: 819.2kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 220.97ms. Allocated memory is still 111.1MB. Free memory was 81.0MB in the beginning and 73.2MB in the end (delta: 7.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * TraceAbstraction took 499.16ms. Allocated memory is still 111.1MB. Free memory was 72.6MB in the beginning and 49.5MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Witness Printer took 24.74ms. Allocated memory is still 111.1MB. Free memory was 49.5MB in the beginning and 48.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 333]: integer overflow possible integer overflow possible We found a FailurePath: [L332] int x = -2147483647 - 1; [L333] x-- VAL [x=-2147483648, x--=-2147483648] - UnprovableResult [Line: 333]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2 mSDsluCounter, 3 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2 IncrementalHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 2 mSDtfsCounter, 2 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=0, InterpolantAutomatonStates: 3, 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, 0.1s InterpolantComputationTime, 7 NumberOfCodeBlocks, 7 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 2 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 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! [2021-12-22 19:23:45,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW)