./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_34379ec0-9214-49b9-8aff-8f3d338b2471/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_34379ec0-9214-49b9-8aff-8f3d338b2471/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_34379ec0-9214-49b9-8aff-8f3d338b2471/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_34379ec0-9214-49b9-8aff-8f3d338b2471/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/signedintegeroverflow-regression/PostfixDecrement.i -s /tmp/vcloud-vcloud-master/worker/run_dir_34379ec0-9214-49b9-8aff-8f3d338b2471/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_34379ec0-9214-49b9-8aff-8f3d338b2471/bin/uautomizer --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 5098e3d431ffea128b6fb3ac04da30361a618d04 ..................................................................................................................................................................................................................................................................... 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 0.2.0-a4ecdab [2020-11-28 03:16:30,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:16:30,149 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:16:30,194 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:16:30,195 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:16:30,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:16:30,199 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:16:30,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:16:30,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:16:30,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:16:30,215 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:16:30,218 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:16:30,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:16:30,224 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:16:30,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:16:30,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:16:30,231 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:16:30,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:16:30,244 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:16:30,250 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:16:30,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:16:30,261 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:16:30,269 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:16:30,270 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:16:30,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:16:30,277 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:16:30,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:16:30,279 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:16:30,281 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:16:30,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:16:30,284 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:16:30,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:16:30,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:16:30,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:16:30,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:16:30,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:16:30,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:16:30,292 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:16:30,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:16:30,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:16:30,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:16:30,298 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_34379ec0-9214-49b9-8aff-8f3d338b2471/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf [2020-11-28 03:16:30,362 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:16:30,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:16:30,364 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:16:30,365 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:16:30,365 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:16:30,365 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:16:30,366 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:16:30,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:16:30,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:16:30,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:16:30,368 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:16:30,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:16:30,369 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-28 03:16:30,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:16:30,369 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:16:30,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:16:30,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:16:30,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:16:30,370 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:16:30,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:16:30,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:16:30,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:16:30,372 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:16:30,372 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:16:30,372 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:16:30,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:16:30,373 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:16:30,373 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:16:30,373 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:/tmp/vcloud-vcloud-master/worker/run_dir_34379ec0-9214-49b9-8aff-8f3d338b2471/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_34379ec0-9214-49b9-8aff-8f3d338b2471/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5098e3d431ffea128b6fb3ac04da30361a618d04 [2020-11-28 03:16:30,674 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:16:30,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:16:30,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:16:30,725 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:16:30,726 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:16:30,727 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_34379ec0-9214-49b9-8aff-8f3d338b2471/bin/uautomizer/../../sv-benchmarks/c/signedintegeroverflow-regression/PostfixDecrement.i [2020-11-28 03:16:30,815 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_34379ec0-9214-49b9-8aff-8f3d338b2471/bin/uautomizer/data/2d5e8b76c/2b8da89357a44b1eb98eea2b47eb4431/FLAGe5976817b [2020-11-28 03:16:31,406 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:16:31,406 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_34379ec0-9214-49b9-8aff-8f3d338b2471/sv-benchmarks/c/signedintegeroverflow-regression/PostfixDecrement.i [2020-11-28 03:16:31,420 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_34379ec0-9214-49b9-8aff-8f3d338b2471/bin/uautomizer/data/2d5e8b76c/2b8da89357a44b1eb98eea2b47eb4431/FLAGe5976817b [2020-11-28 03:16:31,707 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_34379ec0-9214-49b9-8aff-8f3d338b2471/bin/uautomizer/data/2d5e8b76c/2b8da89357a44b1eb98eea2b47eb4431 [2020-11-28 03:16:31,710 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:16:31,711 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:16:31,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:16:31,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:16:31,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:16:31,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:16:31" (1/1) ... [2020-11-28 03:16:31,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d7b7235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:31, skipping insertion in model container [2020-11-28 03:16:31,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:16:31" (1/1) ... [2020-11-28 03:16:31,748 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:16:31,811 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:16:32,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:16:32,251 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:16:32,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:16:32,357 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:16:32,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:32 WrapperNode [2020-11-28 03:16:32,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:16:32,365 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:16:32,365 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:16:32,365 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:16:32,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:32" (1/1) ... [2020-11-28 03:16:32,389 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:32" (1/1) ... [2020-11-28 03:16:32,410 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:16:32,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:16:32,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:16:32,412 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:16:32,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:32" (1/1) ... [2020-11-28 03:16:32,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:32" (1/1) ... [2020-11-28 03:16:32,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:32" (1/1) ... [2020-11-28 03:16:32,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:32" (1/1) ... [2020-11-28 03:16:32,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:32" (1/1) ... [2020-11-28 03:16:32,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:32" (1/1) ... [2020-11-28 03:16:32,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:32" (1/1) ... [2020-11-28 03:16:32,434 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:16:32,435 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:16:32,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:16:32,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:16:32,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_34379ec0-9214-49b9-8aff-8f3d338b2471/bin/uautomizer/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 [2020-11-28 03:16:32,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:16:32,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:16:32,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:16:32,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:16:32,831 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:16:32,831 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-11-28 03:16:32,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:16:32 BoogieIcfgContainer [2020-11-28 03:16:32,833 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:16:32,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:16:32,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:16:32,854 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:16:32,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:16:31" (1/3) ... [2020-11-28 03:16:32,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e2c05fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:16:32, skipping insertion in model container [2020-11-28 03:16:32,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:16:32" (2/3) ... [2020-11-28 03:16:32,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e2c05fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:16:32, skipping insertion in model container [2020-11-28 03:16:32,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:16:32" (3/3) ... [2020-11-28 03:16:32,859 INFO L111 eAbstractionObserver]: Analyzing ICFG PostfixDecrement.i [2020-11-28 03:16:32,870 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:16:32,874 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-28 03:16:32,887 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-28 03:16:32,914 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:16:32,914 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:16:32,914 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:16:32,915 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:16:32,915 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:16:32,915 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:16:32,915 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:16:32,915 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:16:32,930 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2020-11-28 03:16:32,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-28 03:16:32,935 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:16:32,936 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-28 03:16:32,936 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:16:32,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:16:32,943 INFO L82 PathProgramCache]: Analyzing trace with hash 29856, now seen corresponding path program 1 times [2020-11-28 03:16:32,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:16:32,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814880854] [2020-11-28 03:16:32,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:16:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:16:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:16:33,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814880854] [2020-11-28 03:16:33,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:16:33,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 03:16:33,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482108638] [2020-11-28 03:16:33,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 03:16:33,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:16:33,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 03:16:33,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 03:16:33,171 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2020-11-28 03:16:33,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:16:33,201 INFO L93 Difference]: Finished difference Result 9 states and 8 transitions. [2020-11-28 03:16:33,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 03:16:33,204 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-28 03:16:33,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:16:33,213 INFO L225 Difference]: With dead ends: 9 [2020-11-28 03:16:33,213 INFO L226 Difference]: Without dead ends: 5 [2020-11-28 03:16:33,216 INFO L677 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 [2020-11-28 03:16:33,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2020-11-28 03:16:33,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2020-11-28 03:16:33,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-28 03:16:33,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 4 transitions. [2020-11-28 03:16:33,249 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 4 transitions. Word has length 3 [2020-11-28 03:16:33,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:16:33,250 INFO L481 AbstractCegarLoop]: Abstraction has 5 states and 4 transitions. [2020-11-28 03:16:33,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 03:16:33,250 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 4 transitions. [2020-11-28 03:16:33,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 03:16:33,251 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:16:33,251 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 03:16:33,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:16:33,251 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-28 03:16:33,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:16:33,253 INFO L82 PathProgramCache]: Analyzing trace with hash 925572, now seen corresponding path program 1 times [2020-11-28 03:16:33,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:16:33,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782924195] [2020-11-28 03:16:33,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:16:33,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:16:33,274 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:16:33,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:16:33,288 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:16:33,309 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:16:33,309 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 03:16:33,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:16:33,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:16:33 BoogieIcfgContainer [2020-11-28 03:16:33,331 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:16:33,331 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:16:33,332 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:16:33,332 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:16:33,332 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:16:32" (3/4) ... [2020-11-28 03:16:33,335 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 03:16:33,370 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_34379ec0-9214-49b9-8aff-8f3d338b2471/bin/uautomizer/witness.graphml [2020-11-28 03:16:33,371 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:16:33,373 INFO L168 Benchmark]: Toolchain (without parser) took 1660.46 ms. Allocated memory was 94.4 MB in the beginning and 121.6 MB in the end (delta: 27.3 MB). Free memory was 66.8 MB in the beginning and 54.3 MB in the end (delta: 12.6 MB). Peak memory consumption was 38.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:16:33,374 INFO L168 Benchmark]: CDTParser took 0.92 ms. Allocated memory is still 94.4 MB. Free memory was 58.5 MB in the beginning and 58.4 MB in the end (delta: 75.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:16:33,375 INFO L168 Benchmark]: CACSL2BoogieTranslator took 650.31 ms. Allocated memory was 94.4 MB in the beginning and 121.6 MB in the end (delta: 27.3 MB). Free memory was 66.8 MB in the beginning and 89.4 MB in the end (delta: -22.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:16:33,376 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.79 ms. Allocated memory is still 121.6 MB. Free memory was 89.4 MB in the beginning and 87.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:16:33,377 INFO L168 Benchmark]: Boogie Preprocessor took 23.55 ms. Allocated memory is still 121.6 MB. Free memory was 87.8 MB in the beginning and 86.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:16:33,378 INFO L168 Benchmark]: RCFGBuilder took 397.80 ms. Allocated memory is still 121.6 MB. Free memory was 86.6 MB in the beginning and 76.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:16:33,378 INFO L168 Benchmark]: TraceAbstraction took 495.63 ms. Allocated memory is still 121.6 MB. Free memory was 75.7 MB in the beginning and 55.8 MB in the end (delta: 19.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-28 03:16:33,379 INFO L168 Benchmark]: Witness Printer took 39.22 ms. Allocated memory is still 121.6 MB. Free memory was 55.8 MB in the beginning and 54.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:16:33,384 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.92 ms. Allocated memory is still 94.4 MB. Free memory was 58.5 MB in the beginning and 58.4 MB in the end (delta: 75.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 650.31 ms. Allocated memory was 94.4 MB in the beginning and 121.6 MB in the end (delta: 27.3 MB). Free memory was 66.8 MB in the beginning and 89.4 MB in the end (delta: -22.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.79 ms. Allocated memory is still 121.6 MB. Free memory was 89.4 MB in the beginning and 87.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.55 ms. Allocated memory is still 121.6 MB. Free memory was 87.8 MB in the beginning and 86.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 397.80 ms. Allocated memory is still 121.6 MB. Free memory was 86.6 MB in the beginning and 76.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 495.63 ms. Allocated memory is still 121.6 MB. Free memory was 75.7 MB in the beginning and 55.8 MB in the end (delta: 19.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * Witness Printer took 39.22 ms. Allocated memory is still 121.6 MB. Free memory was 55.8 MB in the beginning and 54.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 333]: integer overflow possible integer overflow possible We found a FailurePath: [L332] int x = -2147483647 - 1; [L333] x-- - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 SDtfs, 2 SDslu, 1 SDs, 0 SdLazy, 2 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, 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, 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...