./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/signedintegeroverflow-regression/PrefixDecrement.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_1a927b2d-b333-4ff6-b126-fa5a9ebf66dd/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1a927b2d-b333-4ff6-b126-fa5a9ebf66dd/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1a927b2d-b333-4ff6-b126-fa5a9ebf66dd/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1a927b2d-b333-4ff6-b126-fa5a9ebf66dd/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/signedintegeroverflow-regression/PrefixDecrement.i -s /tmp/vcloud-vcloud-master/worker/run_dir_1a927b2d-b333-4ff6-b126-fa5a9ebf66dd/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1a927b2d-b333-4ff6-b126-fa5a9ebf66dd/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 058f2b919df241022a2d1e4bdbdaa26cd8e08c13 ............................................................................................................................................................................................................................................................................... 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 [2020-11-22 12:58:59,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:58:59,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:58:59,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:58:59,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:58:59,501 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:58:59,503 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:58:59,507 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:58:59,510 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:58:59,519 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:58:59,520 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:58:59,522 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:58:59,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:58:59,530 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:58:59,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:58:59,534 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:58:59,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:58:59,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:58:59,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:58:59,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:58:59,552 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:58:59,554 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:58:59,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:58:59,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:58:59,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:58:59,567 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:58:59,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:58:59,569 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:58:59,570 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:58:59,571 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:58:59,572 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:58:59,573 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:58:59,575 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:58:59,577 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:58:59,578 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:58:59,578 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:58:59,579 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:58:59,579 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:58:59,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:58:59,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:58:59,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:58:59,587 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1a927b2d-b333-4ff6-b126-fa5a9ebf66dd/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-11-22 12:58:59,625 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:58:59,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:58:59,627 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:58:59,627 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:58:59,627 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:58:59,628 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:58:59,628 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:58:59,628 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:58:59,628 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:58:59,628 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:58:59,629 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:58:59,630 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:58:59,630 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:58:59,630 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:58:59,631 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:58:59,631 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:58:59,632 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-22 12:58:59,632 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:58:59,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:58:59,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:58:59,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:58:59,633 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:58:59,633 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-22 12:58:59,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:58:59,633 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:58:59,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:58:59,634 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:58:59,634 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:58:59,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:58:59,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:58:59,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:58:59,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:58:59,635 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:58:59,636 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:58:59,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:58:59,636 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:58:59,636 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:58:59,636 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:58:59,637 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_1a927b2d-b333-4ff6-b126-fa5a9ebf66dd/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1a927b2d-b333-4ff6-b126-fa5a9ebf66dd/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 058f2b919df241022a2d1e4bdbdaa26cd8e08c13 [2020-11-22 12:58:59,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:58:59,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:58:59,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:58:59,981 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:58:59,983 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:58:59,984 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1a927b2d-b333-4ff6-b126-fa5a9ebf66dd/bin/utaipan/../../sv-benchmarks/c/signedintegeroverflow-regression/PrefixDecrement.i [2020-11-22 12:59:00,091 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1a927b2d-b333-4ff6-b126-fa5a9ebf66dd/bin/utaipan/data/0c732e002/22bbf612ad034c55982f048aa87d1eb3/FLAG11abe173a [2020-11-22 12:59:00,646 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:59:00,647 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1a927b2d-b333-4ff6-b126-fa5a9ebf66dd/sv-benchmarks/c/signedintegeroverflow-regression/PrefixDecrement.i [2020-11-22 12:59:00,657 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1a927b2d-b333-4ff6-b126-fa5a9ebf66dd/bin/utaipan/data/0c732e002/22bbf612ad034c55982f048aa87d1eb3/FLAG11abe173a [2020-11-22 12:59:00,968 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1a927b2d-b333-4ff6-b126-fa5a9ebf66dd/bin/utaipan/data/0c732e002/22bbf612ad034c55982f048aa87d1eb3 [2020-11-22 12:59:00,972 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:59:00,974 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:59:00,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:59:00,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:59:00,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:59:00,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:59:00" (1/1) ... [2020-11-22 12:59:00,986 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a7be39b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:00, skipping insertion in model container [2020-11-22 12:59:00,986 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:59:00" (1/1) ... [2020-11-22 12:59:00,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:59:01,040 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:59:01,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:59:01,354 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:59:01,386 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:59:01,433 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:59:01,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:01 WrapperNode [2020-11-22 12:59:01,434 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:59:01,435 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:59:01,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:59:01,436 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:59:01,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:01" (1/1) ... [2020-11-22 12:59:01,455 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:01" (1/1) ... [2020-11-22 12:59:01,471 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:59:01,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:59:01,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:59:01,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:59:01,480 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:01" (1/1) ... [2020-11-22 12:59:01,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:01" (1/1) ... [2020-11-22 12:59:01,483 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:01" (1/1) ... [2020-11-22 12:59:01,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:01" (1/1) ... [2020-11-22 12:59:01,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:01" (1/1) ... [2020-11-22 12:59:01,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:01" (1/1) ... [2020-11-22 12:59:01,489 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:01" (1/1) ... [2020-11-22 12:59:01,491 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:59:01,491 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:59:01,492 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:59:01,492 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:59:01,493 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1a927b2d-b333-4ff6-b126-fa5a9ebf66dd/bin/utaipan/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 [2020-11-22 12:59:01,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-22 12:59:01,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-22 12:59:01,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:59:01,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:59:01,875 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:59:01,875 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-11-22 12:59:01,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:59:01 BoogieIcfgContainer [2020-11-22 12:59:01,877 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:59:01,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:59:01,879 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:59:01,882 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:59:01,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:59:00" (1/3) ... [2020-11-22 12:59:01,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4143883b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:59:01, skipping insertion in model container [2020-11-22 12:59:01,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:59:01" (2/3) ... [2020-11-22 12:59:01,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4143883b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:59:01, skipping insertion in model container [2020-11-22 12:59:01,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:59:01" (3/3) ... [2020-11-22 12:59:01,885 INFO L111 eAbstractionObserver]: Analyzing ICFG PrefixDecrement.i [2020-11-22 12:59:01,895 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:59:01,900 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-22 12:59:01,911 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-22 12:59:01,935 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:59:01,936 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:59:01,936 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:59:01,936 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:59:01,936 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:59:01,936 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:59:01,937 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:59:01,937 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:59:01,950 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2020-11-22 12:59:01,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2020-11-22 12:59:01,955 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:59:01,956 INFO L422 BasicCegarLoop]: trace histogram [1, 1] [2020-11-22 12:59:01,956 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 12:59:01,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:59:01,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1274, now seen corresponding path program 1 times [2020-11-22 12:59:01,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:59:01,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924390553] [2020-11-22 12:59:01,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:59:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 12:59:02,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 12:59:02,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924390553] [2020-11-22 12:59:02,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 12:59:02,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-22 12:59:02,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199798532] [2020-11-22 12:59:02,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-22 12:59:02,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 12:59:02,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-22 12:59:02,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:59:02,173 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2020-11-22 12:59:02,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 12:59:02,204 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2020-11-22 12:59:02,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-22 12:59:02,207 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2020-11-22 12:59:02,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 12:59:02,216 INFO L225 Difference]: With dead ends: 6 [2020-11-22 12:59:02,216 INFO L226 Difference]: Without dead ends: 4 [2020-11-22 12:59:02,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-22 12:59:02,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4 states. [2020-11-22 12:59:02,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4 to 4. [2020-11-22 12:59:02,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-22 12:59:02,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 3 transitions. [2020-11-22 12:59:02,265 INFO L78 Accepts]: Start accepts. Automaton has 4 states and 3 transitions. Word has length 2 [2020-11-22 12:59:02,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 12:59:02,266 INFO L481 AbstractCegarLoop]: Abstraction has 4 states and 3 transitions. [2020-11-22 12:59:02,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-22 12:59:02,266 INFO L276 IsEmpty]: Start isEmpty. Operand 4 states and 3 transitions. [2020-11-22 12:59:02,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-22 12:59:02,267 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:59:02,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-22 12:59:02,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:59:02,268 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 12:59:02,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:59:02,270 INFO L82 PathProgramCache]: Analyzing trace with hash 39530, now seen corresponding path program 1 times [2020-11-22 12:59:02,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:59:02,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751255266] [2020-11-22 12:59:02,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:59:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 12:59:02,301 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 12:59:02,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 12:59:02,325 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 12:59:02,343 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-22 12:59:02,343 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 12:59:02,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 12:59:02,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:59:02 BoogieIcfgContainer [2020-11-22 12:59:02,360 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:59:02,361 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:59:02,361 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:59:02,361 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:59:02,361 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:59:01" (3/4) ... [2020-11-22 12:59:02,363 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-22 12:59:02,392 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1a927b2d-b333-4ff6-b126-fa5a9ebf66dd/bin/utaipan/witness.graphml [2020-11-22 12:59:02,392 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:59:02,394 INFO L168 Benchmark]: Toolchain (without parser) took 1419.68 ms. Allocated memory is still 98.6 MB. Free memory was 65.4 MB in the beginning and 70.6 MB in the end (delta: -5.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:59:02,395 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 71.3 MB. Free memory is still 31.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:59:02,395 INFO L168 Benchmark]: CACSL2BoogieTranslator took 456.80 ms. Allocated memory is still 98.6 MB. Free memory was 65.2 MB in the beginning and 66.6 MB in the end (delta: -1.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 12:59:02,396 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.82 ms. Allocated memory is still 98.6 MB. Free memory was 66.6 MB in the beginning and 65.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 12:59:02,399 INFO L168 Benchmark]: Boogie Preprocessor took 18.91 ms. Allocated memory is still 98.6 MB. Free memory was 64.9 MB in the beginning and 64.1 MB in the end (delta: 811.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:59:02,405 INFO L168 Benchmark]: RCFGBuilder took 385.62 ms. Allocated memory is still 98.6 MB. Free memory was 64.1 MB in the beginning and 52.3 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-22 12:59:02,407 INFO L168 Benchmark]: TraceAbstraction took 481.98 ms. Allocated memory is still 98.6 MB. Free memory was 51.5 MB in the beginning and 72.1 MB in the end (delta: -20.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:59:02,407 INFO L168 Benchmark]: Witness Printer took 31.67 ms. Allocated memory is still 98.6 MB. Free memory was 71.6 MB in the beginning and 70.6 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:59:02,414 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 71.3 MB. Free memory is still 31.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 456.80 ms. Allocated memory is still 98.6 MB. Free memory was 65.2 MB in the beginning and 66.6 MB in the end (delta: -1.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.82 ms. Allocated memory is still 98.6 MB. Free memory was 66.6 MB in the beginning and 65.3 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.91 ms. Allocated memory is still 98.6 MB. Free memory was 64.9 MB in the beginning and 64.1 MB in the end (delta: 811.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 385.62 ms. Allocated memory is still 98.6 MB. Free memory was 64.1 MB in the beginning and 52.3 MB in the end (delta: 11.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 481.98 ms. Allocated memory is still 98.6 MB. Free memory was 51.5 MB in the beginning and 72.1 MB in the end (delta: -20.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 31.67 ms. Allocated memory is still 98.6 MB. Free memory was 71.6 MB in the beginning and 70.6 MB in the end (delta: 1.0 MB). There was no memory consumed. 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, 6 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: 1 SDtfs, 2 SDslu, 0 SDs, 0 SdLazy, 2 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6occurred 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, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 1 ConstructedInterpolants, 0 QuantifiedInterpolants, 5 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...