./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-15/array18_alloca.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-15/array18_alloca.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2 --witnessprinter.witness.filename witness --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 91342ec879332f5d2cf6840d919ddc3d2a815377394d5610d880c093520bd843 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:26:32,660 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:26:32,749 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Overflow-64bit-Taipan_Default.epf [2024-11-02 12:26:32,758 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:26:32,759 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:26:32,795 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:26:32,796 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:26:32,796 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:26:32,797 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:26:32,798 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:26:32,799 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:26:32,799 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:26:32,800 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:26:32,800 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:26:32,800 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:26:32,803 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:26:32,804 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:26:32,804 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:26:32,805 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:26:32,805 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:26:32,805 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:26:32,810 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:26:32,810 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:26:32,810 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:26:32,811 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:26:32,811 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:26:32,811 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:26:32,811 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:26:32,812 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:26:32,812 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:26:32,812 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-02 12:26:32,812 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-02 12:26:32,813 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:26:32,815 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:26:32,816 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:26:32,816 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:26:32,816 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:26:32,817 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:26:32,817 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:26:32,817 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:26:32,817 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:26:32,818 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:26:32,818 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:26:32,818 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:26:32,818 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:26:32,819 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:26:32,819 INFO L153 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_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 91342ec879332f5d2cf6840d919ddc3d2a815377394d5610d880c093520bd843 [2024-11-02 12:26:33,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:26:33,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:26:33,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:26:33,139 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:26:33,140 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:26:33,142 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/termination-15/array18_alloca.i Unable to find full path for "g++" [2024-11-02 12:26:35,377 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:26:35,642 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:26:35,643 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/sv-benchmarks/c/termination-15/array18_alloca.i [2024-11-02 12:26:35,653 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2/data/403750999/36f3a9c228c44da384234d9d8a41e74f/FLAG9f8f0a28a [2024-11-02 12:26:35,666 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2/data/403750999/36f3a9c228c44da384234d9d8a41e74f [2024-11-02 12:26:35,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:26:35,670 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:26:35,671 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:26:35,671 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:26:35,678 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:26:35,679 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:26:35" (1/1) ... [2024-11-02 12:26:35,680 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2760b325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:26:35, skipping insertion in model container [2024-11-02 12:26:35,681 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:26:35" (1/1) ... [2024-11-02 12:26:35,724 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:26:36,193 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:26:36,204 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:26:36,267 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:26:36,311 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:26:36,311 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:26:36 WrapperNode [2024-11-02 12:26:36,312 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:26:36,313 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:26:36,313 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:26:36,313 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:26:36,321 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:26:36" (1/1) ... [2024-11-02 12:26:36,336 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:26:36" (1/1) ... [2024-11-02 12:26:36,359 INFO L138 Inliner]: procedures = 151, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 56 [2024-11-02 12:26:36,359 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:26:36,362 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:26:36,362 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:26:36,362 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:26:36,371 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:26:36" (1/1) ... [2024-11-02 12:26:36,371 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:26:36" (1/1) ... [2024-11-02 12:26:36,378 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:26:36" (1/1) ... [2024-11-02 12:26:36,378 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:26:36" (1/1) ... [2024-11-02 12:26:36,386 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:26:36" (1/1) ... [2024-11-02 12:26:36,389 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:26:36" (1/1) ... [2024-11-02 12:26:36,390 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:26:36" (1/1) ... [2024-11-02 12:26:36,395 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:26:36" (1/1) ... [2024-11-02 12:26:36,397 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:26:36,397 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:26:36,398 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:26:36,400 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:26:36,401 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:26:36" (1/1) ... [2024-11-02 12:26:36,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:26:36,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:26:36,433 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:26:36,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:26:36,469 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 12:26:36,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 12:26:36,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 12:26:36,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 12:26:36,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:26:36,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:26:36,557 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:26:36,562 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:26:36,743 INFO L? ?]: Removed 17 outVars from TransFormulas that were not future-live. [2024-11-02 12:26:36,744 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:26:36,808 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:26:36,809 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-02 12:26:36,809 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:26:36 BoogieIcfgContainer [2024-11-02 12:26:36,809 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:26:36,812 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:26:36,812 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:26:36,815 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:26:36,816 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:26:35" (1/3) ... [2024-11-02 12:26:36,816 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a5ddcbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:26:36, skipping insertion in model container [2024-11-02 12:26:36,816 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:26:36" (2/3) ... [2024-11-02 12:26:36,817 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a5ddcbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:26:36, skipping insertion in model container [2024-11-02 12:26:36,817 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:26:36" (3/3) ... [2024-11-02 12:26:36,822 INFO L112 eAbstractionObserver]: Analyzing ICFG array18_alloca.i [2024-11-02 12:26:36,844 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:26:36,844 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2024-11-02 12:26:36,916 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:26:36,923 INFO L333 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@17bc7312, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:26:36,924 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-11-02 12:26:36,928 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:26:36,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-02 12:26:36,934 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:26:36,935 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-02 12:26:36,936 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2024-11-02 12:26:36,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:26:36,941 INFO L85 PathProgramCache]: Analyzing trace with hash 2964994, now seen corresponding path program 1 times [2024-11-02 12:26:36,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:26:36,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813954406] [2024-11-02 12:26:36,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:26:36,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:26:37,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:26:37,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:26:37,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:26:37,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813954406] [2024-11-02 12:26:37,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813954406] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:26:37,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:26:37,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:26:37,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651096900] [2024-11-02 12:26:37,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:26:37,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:26:37,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:26:37,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:26:37,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:26:37,380 INFO L87 Difference]: Start difference. First operand has 18 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:26:37,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:26:37,432 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2024-11-02 12:26:37,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:26:37,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-02 12:26:37,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:26:37,443 INFO L225 Difference]: With dead ends: 23 [2024-11-02 12:26:37,443 INFO L226 Difference]: Without dead ends: 19 [2024-11-02 12:26:37,446 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:26:37,449 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:26:37,450 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:26:37,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-02 12:26:37,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-02 12:26:37,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:26:37,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2024-11-02 12:26:37,483 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 4 [2024-11-02 12:26:37,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:26:37,484 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2024-11-02 12:26:37,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:26:37,484 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2024-11-02 12:26:37,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-02 12:26:37,485 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:26:37,485 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-02 12:26:37,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:26:37,486 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2024-11-02 12:26:37,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:26:37,487 INFO L85 PathProgramCache]: Analyzing trace with hash 91909591, now seen corresponding path program 1 times [2024-11-02 12:26:37,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:26:37,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190203457] [2024-11-02 12:26:37,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:26:37,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:26:37,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:26:37,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:26:37,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:26:37,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190203457] [2024-11-02 12:26:37,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190203457] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:26:37,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:26:37,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:26:37,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558725218] [2024-11-02 12:26:37,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:26:37,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:26:37,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:26:37,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:26:37,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:26:37,646 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:26:37,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:26:37,675 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2024-11-02 12:26:37,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:26:37,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-02 12:26:37,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:26:37,677 INFO L225 Difference]: With dead ends: 29 [2024-11-02 12:26:37,677 INFO L226 Difference]: Without dead ends: 19 [2024-11-02 12:26:37,678 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:26:37,679 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-02 12:26:37,680 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-02 12:26:37,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-02 12:26:37,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-02 12:26:37,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:26:37,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2024-11-02 12:26:37,684 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 5 [2024-11-02 12:26:37,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:26:37,685 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2024-11-02 12:26:37,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:26:37,686 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2024-11-02 12:26:37,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-02 12:26:37,686 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:26:37,686 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-02 12:26:37,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:26:37,687 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2024-11-02 12:26:37,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:26:37,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1864113227, now seen corresponding path program 1 times [2024-11-02 12:26:37,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:26:37,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473767120] [2024-11-02 12:26:37,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:26:37,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:26:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:26:37,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:26:37,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:26:37,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473767120] [2024-11-02 12:26:37,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473767120] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:26:37,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972436265] [2024-11-02 12:26:37,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:26:37,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:26:37,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:26:37,850 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:26:37,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:26:37,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:26:37,941 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-02 12:26:37,950 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:26:38,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:26:38,030 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:26:38,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972436265] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:26:38,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:26:38,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-11-02 12:26:38,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824353536] [2024-11-02 12:26:38,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:26:38,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 12:26:38,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:26:38,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 12:26:38,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:26:38,035 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:26:38,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:26:38,105 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2024-11-02 12:26:38,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:26:38,106 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-02 12:26:38,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:26:38,107 INFO L225 Difference]: With dead ends: 19 [2024-11-02 12:26:38,107 INFO L226 Difference]: Without dead ends: 18 [2024-11-02 12:26:38,108 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:26:38,109 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:26:38,110 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 48 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:26:38,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-11-02 12:26:38,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-11-02 12:26:38,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:26:38,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-11-02 12:26:38,114 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 7 [2024-11-02 12:26:38,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:26:38,115 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-11-02 12:26:38,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:26:38,115 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-11-02 12:26:38,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-02 12:26:38,116 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:26:38,116 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:26:38,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:26:38,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:26:38,321 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2024-11-02 12:26:38,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:26:38,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1952940412, now seen corresponding path program 1 times [2024-11-02 12:26:38,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:26:38,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406735924] [2024-11-02 12:26:38,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:26:38,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:26:38,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:26:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:26:38,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:26:38,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406735924] [2024-11-02 12:26:38,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406735924] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:26:38,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125955375] [2024-11-02 12:26:38,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:26:38,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:26:38,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:26:38,859 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:26:38,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:26:38,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:26:38,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-02 12:26:38,946 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:26:39,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 40 [2024-11-02 12:26:39,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2024-11-02 12:26:39,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-02 12:26:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:26:39,169 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:26:39,315 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 12:26:39,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 53 [2024-11-02 12:26:39,412 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-02 12:26:39,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 12 [2024-11-02 12:26:39,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2024-11-02 12:26:39,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:26:39,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125955375] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:26:39,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1307681293] [2024-11-02 12:26:39,463 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-02 12:26:39,463 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:26:39,467 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:26:39,472 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:26:39,473 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:26:40,257 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:26:40,589 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '257#(and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= (+ 2147483650 (select (select |#memory_int| |ULTIMATE.start_main_~arr~0#1.base|) 0)) 0) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~arr~0#1.base|) (= |ULTIMATE.start_main_~arr~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 2 |ULTIMATE.start_main_#t~malloc206#1.base|))' at error location [2024-11-02 12:26:40,589 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:26:40,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:26:40,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-02 12:26:40,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875020123] [2024-11-02 12:26:40,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:26:40,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-02 12:26:40,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:26:40,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-02 12:26:40,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2024-11-02 12:26:40,592 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:26:40,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:26:40,720 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2024-11-02 12:26:40,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 12:26:40,721 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-02 12:26:40,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:26:40,721 INFO L225 Difference]: With dead ends: 26 [2024-11-02 12:26:40,721 INFO L226 Difference]: Without dead ends: 24 [2024-11-02 12:26:40,722 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-11-02 12:26:40,723 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 35 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:26:40,723 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 15 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:26:40,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-02 12:26:40,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2024-11-02 12:26:40,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.411764705882353) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:26:40,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2024-11-02 12:26:40,735 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 8 [2024-11-02 12:26:40,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:26:40,735 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2024-11-02 12:26:40,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:26:40,736 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2024-11-02 12:26:40,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-02 12:26:40,736 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:26:40,736 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2024-11-02 12:26:40,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-02 12:26:40,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:26:40,941 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2024-11-02 12:26:40,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:26:40,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1952935126, now seen corresponding path program 1 times [2024-11-02 12:26:40,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:26:40,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948854573] [2024-11-02 12:26:40,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:26:40,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:26:40,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:26:41,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:26:41,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:26:41,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948854573] [2024-11-02 12:26:41,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948854573] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:26:41,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145870260] [2024-11-02 12:26:41,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:26:41,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:26:41,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:26:41,041 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:26:41,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:26:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:26:41,107 INFO L255 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-02 12:26:41,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:26:41,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:26:41,138 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:26:41,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:26:41,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145870260] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:26:41,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1483675618] [2024-11-02 12:26:41,192 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-02 12:26:41,192 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:26:41,193 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:26:41,193 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:26:41,193 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:26:41,686 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:26:41,922 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '377#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_~arr~0#1.base|) (= |ULTIMATE.start_main_~arr~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length~0#1|) (<= 2 |ULTIMATE.start_main_#t~malloc206#1.base|))' at error location [2024-11-02 12:26:41,922 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:26:41,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:26:41,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-02 12:26:41,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135048071] [2024-11-02 12:26:41,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:26:41,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-02 12:26:41,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:26:41,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-02 12:26:41,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-11-02 12:26:41,924 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:26:41,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:26:41,985 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2024-11-02 12:26:41,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-02 12:26:41,986 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-02 12:26:41,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:26:41,988 INFO L225 Difference]: With dead ends: 32 [2024-11-02 12:26:41,988 INFO L226 Difference]: Without dead ends: 31 [2024-11-02 12:26:41,989 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-11-02 12:26:41,989 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:26:41,990 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:26:41,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-02 12:26:41,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-02 12:26:41,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:26:41,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2024-11-02 12:26:41,995 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 8 [2024-11-02 12:26:41,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:26:41,996 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2024-11-02 12:26:41,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:26:41,996 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2024-11-02 12:26:41,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-02 12:26:41,997 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:26:41,997 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:26:42,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-02 12:26:42,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:26:42,198 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2024-11-02 12:26:42,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:26:42,198 INFO L85 PathProgramCache]: Analyzing trace with hash -411610548, now seen corresponding path program 1 times [2024-11-02 12:26:42,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:26:42,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494009902] [2024-11-02 12:26:42,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:26:42,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:26:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-02 12:26:42,220 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-02 12:26:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-02 12:26:42,251 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2024-11-02 12:26:42,252 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-02 12:26:42,253 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 6 remaining) [2024-11-02 12:26:42,255 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 6 remaining) [2024-11-02 12:26:42,256 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 6 remaining) [2024-11-02 12:26:42,257 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 6 remaining) [2024-11-02 12:26:42,257 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 6 remaining) [2024-11-02 12:26:42,257 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 6 remaining) [2024-11-02 12:26:42,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 12:26:42,261 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2024-11-02 12:26:42,283 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-02 12:26:42,286 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 12:26:42 BoogieIcfgContainer [2024-11-02 12:26:42,286 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-02 12:26:42,287 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-02 12:26:42,287 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-02 12:26:42,287 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-02 12:26:42,288 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:26:36" (3/4) ... [2024-11-02 12:26:42,289 INFO L136 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-02 12:26:42,334 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_553d59a5-5ef5-4375-adf3-736403edaed3/bin/utaipan-verify-DbMuA5NWw2/witness.graphml [2024-11-02 12:26:42,337 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-02 12:26:42,337 INFO L158 Benchmark]: Toolchain (without parser) took 6667.72ms. Allocated memory was 148.9MB in the beginning and 201.3MB in the end (delta: 52.4MB). Free memory was 108.4MB in the beginning and 59.0MB in the end (delta: 49.4MB). Peak memory consumption was 103.8MB. Max. memory is 16.1GB. [2024-11-02 12:26:42,337 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 148.9MB. Free memory is still 122.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-02 12:26:42,338 INFO L158 Benchmark]: CACSL2BoogieTranslator took 641.63ms. Allocated memory is still 148.9MB. Free memory was 108.3MB in the beginning and 88.5MB in the end (delta: 19.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-11-02 12:26:42,338 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.31ms. Allocated memory is still 148.9MB. Free memory was 88.1MB in the beginning and 86.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-02 12:26:42,338 INFO L158 Benchmark]: Boogie Preprocessor took 35.07ms. Allocated memory is still 148.9MB. Free memory was 86.6MB in the beginning and 85.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-02 12:26:42,339 INFO L158 Benchmark]: RCFGBuilder took 412.15ms. Allocated memory is still 148.9MB. Free memory was 85.3MB in the beginning and 71.1MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-11-02 12:26:42,339 INFO L158 Benchmark]: TraceAbstraction took 5474.61ms. Allocated memory was 148.9MB in the beginning and 201.3MB in the end (delta: 52.4MB). Free memory was 70.2MB in the beginning and 61.1MB in the end (delta: 9.0MB). Peak memory consumption was 61.9MB. Max. memory is 16.1GB. [2024-11-02 12:26:42,340 INFO L158 Benchmark]: Witness Printer took 49.95ms. Allocated memory is still 201.3MB. Free memory was 61.1MB in the beginning and 59.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-02 12:26:42,342 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 148.9MB. Free memory is still 122.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 641.63ms. Allocated memory is still 148.9MB. Free memory was 108.3MB in the beginning and 88.5MB in the end (delta: 19.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.31ms. Allocated memory is still 148.9MB. Free memory was 88.1MB in the beginning and 86.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.07ms. Allocated memory is still 148.9MB. Free memory was 86.6MB in the beginning and 85.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 412.15ms. Allocated memory is still 148.9MB. Free memory was 85.3MB in the beginning and 71.1MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 5474.61ms. Allocated memory was 148.9MB in the beginning and 201.3MB in the end (delta: 52.4MB). Free memory was 70.2MB in the beginning and 61.1MB in the end (delta: 9.0MB). Peak memory consumption was 61.9MB. Max. memory is 16.1GB. * Witness Printer took 49.95ms. Allocated memory is still 201.3MB. Free memory was 61.1MB in the beginning and 59.0MB in the end (delta: 2.1MB). 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 378]: integer overflow possible integer overflow possible We found a FailurePath: [L365] int i, j; [L366] int length = __VERIFIER_nondet_int(); [L367] COND FALSE !(length < 1) [L368] int *arr = __builtin_alloca(length*sizeof(int)); VAL [arr={2:0}, length=1] [L369] COND FALSE !(!arr) [L370] i=0 VAL [arr={2:0}, i=0, length=1] [L370] COND TRUE i