./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-crafted/Ackermann-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 5fbdf5bf 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/termination-crafted/Ackermann-1.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 5917ee93972738bd406398210804e4342159e8a8 ................................................................................................................................................................................................................................................................... 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 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-30 22:06:43,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 22:06:43,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 22:06:43,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 22:06:43,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 22:06:43,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 22:06:43,981 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 22:06:43,986 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 22:06:43,987 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 22:06:43,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 22:06:43,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 22:06:43,995 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 22:06:43,995 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 22:06:43,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 22:06:43,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 22:06:44,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 22:06:44,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 22:06:44,001 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 22:06:44,005 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 22:06:44,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 22:06:44,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 22:06:44,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 22:06:44,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 22:06:44,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 22:06:44,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 22:06:44,019 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 22:06:44,020 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 22:06:44,021 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 22:06:44,021 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 22:06:44,022 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 22:06:44,022 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 22:06:44,023 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 22:06:44,024 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 22:06:44,024 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 22:06:44,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 22:06:44,026 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 22:06:44,026 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 22:06:44,026 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 22:06:44,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 22:06:44,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 22:06:44,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 22:06:44,031 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2021-08-30 22:06:44,055 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 22:06:44,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 22:06:44,055 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 22:06:44,055 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 22:06:44,056 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 22:06:44,057 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 22:06:44,057 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 22:06:44,057 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 22:06:44,057 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 22:06:44,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 22:06:44,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 22:06:44,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-30 22:06:44,058 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 22:06:44,058 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-30 22:06:44,058 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-08-30 22:06:44,058 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-30 22:06:44,058 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 22:06:44,058 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-30 22:06:44,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 22:06:44,059 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 22:06:44,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 22:06:44,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 22:06:44,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 22:06:44,059 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 22:06:44,059 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-30 22:06:44,059 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-30 22:06:44,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-30 22:06:44,060 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-30 22:06:44,060 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 22:06:44,060 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5917ee93972738bd406398210804e4342159e8a8 [2021-08-30 22:06:44,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 22:06:44,311 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 22:06:44,313 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 22:06:44,314 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 22:06:44,315 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 22:06:44,316 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/Ackermann-1.c [2021-08-30 22:06:44,363 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aca82d427/2dcc8966a5dd40e89e2f3cf7b1829586/FLAGcc859a66a [2021-08-30 22:06:44,702 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 22:06:44,702 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/Ackermann-1.c [2021-08-30 22:06:44,706 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aca82d427/2dcc8966a5dd40e89e2f3cf7b1829586/FLAGcc859a66a [2021-08-30 22:06:45,123 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aca82d427/2dcc8966a5dd40e89e2f3cf7b1829586 [2021-08-30 22:06:45,127 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 22:06:45,128 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-30 22:06:45,130 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 22:06:45,130 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 22:06:45,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 22:06:45,135 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:06:45" (1/1) ... [2021-08-30 22:06:45,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@184eaff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:06:45, skipping insertion in model container [2021-08-30 22:06:45,137 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:06:45" (1/1) ... [2021-08-30 22:06:45,142 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 22:06:45,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 22:06:45,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 22:06:45,285 INFO L203 MainTranslator]: Completed pre-run [2021-08-30 22:06:45,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 22:06:45,306 INFO L208 MainTranslator]: Completed translation [2021-08-30 22:06:45,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:06:45 WrapperNode [2021-08-30 22:06:45,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 22:06:45,309 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-30 22:06:45,309 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-30 22:06:45,309 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-30 22:06:45,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:06:45" (1/1) ... [2021-08-30 22:06:45,319 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:06:45" (1/1) ... [2021-08-30 22:06:45,334 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-30 22:06:45,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-30 22:06:45,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-30 22:06:45,336 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-30 22:06:45,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:06:45" (1/1) ... [2021-08-30 22:06:45,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:06:45" (1/1) ... [2021-08-30 22:06:45,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:06:45" (1/1) ... [2021-08-30 22:06:45,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:06:45" (1/1) ... [2021-08-30 22:06:45,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:06:45" (1/1) ... [2021-08-30 22:06:45,391 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:06:45" (1/1) ... [2021-08-30 22:06:45,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:06:45" (1/1) ... [2021-08-30 22:06:45,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-30 22:06:45,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-30 22:06:45,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-30 22:06:45,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-30 22:06:45,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:06:45" (1/1) ... [2021-08-30 22:06:45,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 22:06:45,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 22:06:45,429 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) [2021-08-30 22:06:45,465 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 [2021-08-30 22:06:45,481 INFO L130 BoogieDeclarations]: Found specification of procedure Ack [2021-08-30 22:06:45,482 INFO L138 BoogieDeclarations]: Found implementation of procedure Ack [2021-08-30 22:06:45,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-30 22:06:45,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-30 22:06:45,604 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-30 22:06:45,604 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-30 22:06:45,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:06:45 BoogieIcfgContainer [2021-08-30 22:06:45,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-30 22:06:45,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-30 22:06:45,608 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-30 22:06:45,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-30 22:06:45,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 10:06:45" (1/3) ... [2021-08-30 22:06:45,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@697d0726 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:06:45, skipping insertion in model container [2021-08-30 22:06:45,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:06:45" (2/3) ... [2021-08-30 22:06:45,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@697d0726 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:06:45, skipping insertion in model container [2021-08-30 22:06:45,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:06:45" (3/3) ... [2021-08-30 22:06:45,614 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann-1.c [2021-08-30 22:06:45,618 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-30 22:06:45,618 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-08-30 22:06:45,658 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-30 22:06:45,665 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, mConcurrency=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 [2021-08-30 22:06:45,665 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-08-30 22:06:45,678 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.55) internal successors, (31), 28 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-30 22:06:45,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-30 22:06:45,682 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 22:06:45,683 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-30 22:06:45,684 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-08-30 22:06:45,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 22:06:45,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1868849109, now seen corresponding path program 1 times [2021-08-30 22:06:45,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 22:06:45,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568557180] [2021-08-30 22:06:45,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 22:06:45,696 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 22:06:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 22:06:45,765 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-30 22:06:45,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 22:06:45,789 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-30 22:06:45,798 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-30 22:06:45,799 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location AckErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 8 remaining) [2021-08-30 22:06:45,801 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location AckErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 8 remaining) [2021-08-30 22:06:45,801 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location AckErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 8 remaining) [2021-08-30 22:06:45,802 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location AckErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 8 remaining) [2021-08-30 22:06:45,802 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location AckErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 8 remaining) [2021-08-30 22:06:45,802 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location AckErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 8 remaining) [2021-08-30 22:06:45,802 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location AckErr6ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 8 remaining) [2021-08-30 22:06:45,803 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location AckErr7ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 8 remaining) [2021-08-30 22:06:45,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-30 22:06:45,809 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-30 22:06:45,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 10:06:45 BoogieIcfgContainer [2021-08-30 22:06:45,823 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-30 22:06:45,825 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-30 22:06:45,825 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-30 22:06:45,825 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-30 22:06:45,826 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:06:45" (3/4) ... [2021-08-30 22:06:45,827 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-30 22:06:45,852 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-30 22:06:45,852 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-30 22:06:45,854 INFO L158 Benchmark]: Toolchain (without parser) took 725.02ms. Allocated memory was 52.4MB in the beginning and 62.9MB in the end (delta: 10.5MB). Free memory was 30.2MB in the beginning and 41.6MB in the end (delta: -11.4MB). Peak memory consumption was 344.0kB. Max. memory is 16.1GB. [2021-08-30 22:06:45,855 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 52.4MB. Free memory was 35.0MB in the beginning and 35.0MB in the end (delta: 45.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 22:06:45,857 INFO L158 Benchmark]: CACSL2BoogieTranslator took 178.33ms. Allocated memory is still 52.4MB. Free memory was 30.0MB in the beginning and 35.2MB in the end (delta: -5.1MB). Peak memory consumption was 7.2MB. Max. memory is 16.1GB. [2021-08-30 22:06:45,857 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.21ms. Allocated memory is still 52.4MB. Free memory was 35.2MB in the beginning and 33.9MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 22:06:45,858 INFO L158 Benchmark]: Boogie Preprocessor took 62.07ms. Allocated memory was 52.4MB in the beginning and 62.9MB in the end (delta: 10.5MB). Free memory was 33.9MB in the beginning and 47.2MB in the end (delta: -13.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 22:06:45,858 INFO L158 Benchmark]: RCFGBuilder took 207.34ms. Allocated memory is still 62.9MB. Free memory was 47.2MB in the beginning and 39.1MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-30 22:06:45,859 INFO L158 Benchmark]: TraceAbstraction took 214.76ms. Allocated memory is still 62.9MB. Free memory was 38.5MB in the beginning and 43.1MB in the end (delta: -4.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 22:06:45,859 INFO L158 Benchmark]: Witness Printer took 27.89ms. Allocated memory is still 62.9MB. Free memory was 43.1MB in the beginning and 41.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 22:06:45,862 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 52.4MB. Free memory was 35.0MB in the beginning and 35.0MB in the end (delta: 45.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 178.33ms. Allocated memory is still 52.4MB. Free memory was 30.0MB in the beginning and 35.2MB in the end (delta: -5.1MB). Peak memory consumption was 7.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.21ms. Allocated memory is still 52.4MB. Free memory was 35.2MB in the beginning and 33.9MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 62.07ms. Allocated memory was 52.4MB in the beginning and 62.9MB in the end (delta: 10.5MB). Free memory was 33.9MB in the beginning and 47.2MB in the end (delta: -13.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 207.34ms. Allocated memory is still 62.9MB. Free memory was 47.2MB in the beginning and 39.1MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 214.76ms. Allocated memory is still 62.9MB. Free memory was 38.5MB in the beginning and 43.1MB in the end (delta: -4.6MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 27.89ms. Allocated memory is still 62.9MB. Free memory was 43.1MB in the beginning and 41.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 10]: integer overflow possible integer overflow possible We found a FailurePath: [L16] int x = __VERIFIER_nondet_int(); [L17] int y = __VERIFIER_nondet_int(); [L18] COND FALSE !(x < 0 || y < 0) [L21] CALL Ack(x, y) VAL [\old(m)=0, \old(n)=2147483647] [L10] COND TRUE m == 0 VAL [\old(m)=0, \old(n)=2147483647, m=0, n=2147483647] [L10] n+1 VAL [\old(m)=0, \old(n)=2147483647, m=0, n=2147483647] - UnprovableResult [Line: 10]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 11]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 11]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 12]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 12]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 12]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 12]: 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 2 procedures, 34 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 150.97ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 6.24ms, AutomataDifference: 0.00ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 10.31ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.49ms SsaConstructionTime, 25.75ms SatisfiabilityAnalysisTime, 0.00ms InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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! [2021-08-30 22:06:45,894 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...