./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-15/cstrlen_diffterm_alloca.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc 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_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-15/cstrlen_diffterm_alloca.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash c025debcc565a2dee63ce0651143a120d30d92e148bf87ae3ffecb509f27f776 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 14:31:23,569 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 14:31:23,631 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2023-12-02 14:31:23,635 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 14:31:23,636 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 14:31:23,659 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 14:31:23,659 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 14:31:23,660 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 14:31:23,660 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 14:31:23,661 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 14:31:23,661 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 14:31:23,662 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 14:31:23,663 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 14:31:23,663 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 14:31:23,664 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 14:31:23,664 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 14:31:23,665 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 14:31:23,665 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 14:31:23,666 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 14:31:23,666 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 14:31:23,667 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 14:31:23,668 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 14:31:23,669 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 14:31:23,669 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 14:31:23,670 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 14:31:23,670 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 14:31:23,671 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 14:31:23,671 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 14:31:23,672 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 14:31:23,672 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 14:31:23,672 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 14:31:23,673 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 14:31:23,673 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 14:31:23,673 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 14:31:23,674 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 14:31:23,674 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 14:31:23,674 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 14:31:23,674 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:31:23,674 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 14:31:23,675 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 14:31:23,675 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 14:31:23,675 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 14:31:23,675 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 14:31:23,675 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 14:31:23,676 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 14:31:23,676 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_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c025debcc565a2dee63ce0651143a120d30d92e148bf87ae3ffecb509f27f776 [2023-12-02 14:31:23,876 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 14:31:23,896 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 14:31:23,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 14:31:23,900 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 14:31:23,901 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 14:31:23,902 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/termination-15/cstrlen_diffterm_alloca.i [2023-12-02 14:31:26,632 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 14:31:26,836 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 14:31:26,836 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/sv-benchmarks/c/termination-15/cstrlen_diffterm_alloca.i [2023-12-02 14:31:26,847 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/data/b6dd8bc40/377043f7f9564712a42db560c4f260c6/FLAG4d703d761 [2023-12-02 14:31:26,860 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/data/b6dd8bc40/377043f7f9564712a42db560c4f260c6 [2023-12-02 14:31:26,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 14:31:26,864 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 14:31:26,865 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 14:31:26,865 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 14:31:26,870 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 14:31:26,870 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:31:26" (1/1) ... [2023-12-02 14:31:26,872 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28b96a7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:31:26, skipping insertion in model container [2023-12-02 14:31:26,872 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:31:26" (1/1) ... [2023-12-02 14:31:26,915 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:31:27,201 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:31:27,215 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 14:31:27,255 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:31:27,292 INFO L206 MainTranslator]: Completed translation [2023-12-02 14:31:27,292 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:31:27 WrapperNode [2023-12-02 14:31:27,292 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 14:31:27,294 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 14:31:27,294 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 14:31:27,294 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 14:31:27,302 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:31:27" (1/1) ... [2023-12-02 14:31:27,315 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:31:27" (1/1) ... [2023-12-02 14:31:27,335 INFO L138 Inliner]: procedures = 152, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 36 [2023-12-02 14:31:27,335 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 14:31:27,336 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 14:31:27,336 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 14:31:27,336 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 14:31:27,345 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:31:27" (1/1) ... [2023-12-02 14:31:27,345 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:31:27" (1/1) ... [2023-12-02 14:31:27,347 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:31:27" (1/1) ... [2023-12-02 14:31:27,347 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:31:27" (1/1) ... [2023-12-02 14:31:27,352 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:31:27" (1/1) ... [2023-12-02 14:31:27,355 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:31:27" (1/1) ... [2023-12-02 14:31:27,356 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:31:27" (1/1) ... [2023-12-02 14:31:27,357 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:31:27" (1/1) ... [2023-12-02 14:31:27,359 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 14:31:27,359 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 14:31:27,360 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 14:31:27,360 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 14:31:27,361 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:31:27" (1/1) ... [2023-12-02 14:31:27,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:31:27,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:31:27,390 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 14:31:27,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 14:31:27,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 14:31:27,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 14:31:27,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 14:31:27,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 14:31:27,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 14:31:27,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 14:31:27,524 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 14:31:27,526 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 14:31:27,639 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 14:31:27,678 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 14:31:27,678 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 14:31:27,680 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:31:27 BoogieIcfgContainer [2023-12-02 14:31:27,680 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 14:31:27,683 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 14:31:27,683 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 14:31:27,686 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 14:31:27,687 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:31:26" (1/3) ... [2023-12-02 14:31:27,688 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d805f6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:31:27, skipping insertion in model container [2023-12-02 14:31:27,688 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:31:27" (2/3) ... [2023-12-02 14:31:27,688 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d805f6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:31:27, skipping insertion in model container [2023-12-02 14:31:27,689 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:31:27" (3/3) ... [2023-12-02 14:31:27,690 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrlen_diffterm_alloca.i [2023-12-02 14:31:27,707 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 14:31:27,708 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-12-02 14:31:27,752 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:31:27,759 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@6d9eb144, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:31:27,760 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-12-02 14:31:27,764 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 11 states have internal predecessors, (13), 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) [2023-12-02 14:31:27,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-12-02 14:31:27,769 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:31:27,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-12-02 14:31:27,770 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-12-02 14:31:27,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:31:27,774 INFO L85 PathProgramCache]: Analyzing trace with hash 2274, now seen corresponding path program 1 times [2023-12-02 14:31:27,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:31:27,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131373949] [2023-12-02 14:31:27,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:31:27,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:31:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:31:27,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:31:27,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:31:27,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131373949] [2023-12-02 14:31:27,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131373949] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:31:27,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:31:27,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 14:31:27,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453084873] [2023-12-02 14:31:27,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:31:27,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:31:27,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:31:28,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:31:28,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:31:28,020 INFO L87 Difference]: Start difference. First operand has 12 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-12-02 14:31:28,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:31:28,052 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2023-12-02 14:31:28,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:31:28,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2023-12-02 14:31:28,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:31:28,061 INFO L225 Difference]: With dead ends: 11 [2023-12-02 14:31:28,062 INFO L226 Difference]: Without dead ends: 10 [2023-12-02 14:31:28,064 INFO L412 NwaCegarLoop]: 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 [2023-12-02 14:31:28,068 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 7 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:31:28,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 4 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:31:28,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-12-02 14:31:28,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-12-02 14:31:28,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 9 states have internal predecessors, (10), 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) [2023-12-02 14:31:28,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2023-12-02 14:31:28,097 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 2 [2023-12-02 14:31:28,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:31:28,097 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2023-12-02 14:31:28,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-12-02 14:31:28,097 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2023-12-02 14:31:28,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-12-02 14:31:28,098 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:31:28,098 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-12-02 14:31:28,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 14:31:28,098 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-12-02 14:31:28,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:31:28,099 INFO L85 PathProgramCache]: Analyzing trace with hash 2275, now seen corresponding path program 1 times [2023-12-02 14:31:28,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:31:28,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114958764] [2023-12-02 14:31:28,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:31:28,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:31:28,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:31:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:31:28,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:31:28,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114958764] [2023-12-02 14:31:28,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114958764] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:31:28,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:31:28,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 14:31:28,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261261326] [2023-12-02 14:31:28,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:31:28,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:31:28,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:31:28,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:31:28,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:31:28,297 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-12-02 14:31:28,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:31:28,310 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2023-12-02 14:31:28,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:31:28,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2023-12-02 14:31:28,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:31:28,311 INFO L225 Difference]: With dead ends: 9 [2023-12-02 14:31:28,312 INFO L226 Difference]: Without dead ends: 9 [2023-12-02 14:31:28,312 INFO L412 NwaCegarLoop]: 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 [2023-12-02 14:31:28,314 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:31:28,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 4 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:31:28,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-12-02 14:31:28,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2023-12-02 14:31:28,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 6 states have (on average 1.5) internal successors, (9), 8 states have internal predecessors, (9), 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) [2023-12-02 14:31:28,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2023-12-02 14:31:28,317 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 2 [2023-12-02 14:31:28,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:31:28,317 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2023-12-02 14:31:28,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-12-02 14:31:28,318 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2023-12-02 14:31:28,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 14:31:28,318 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:31:28,318 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 14:31:28,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 14:31:28,319 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-12-02 14:31:28,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:31:28,320 INFO L85 PathProgramCache]: Analyzing trace with hash 71350, now seen corresponding path program 1 times [2023-12-02 14:31:28,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:31:28,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546985469] [2023-12-02 14:31:28,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:31:28,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:31:28,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:31:28,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:31:28,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:31:28,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546985469] [2023-12-02 14:31:28,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546985469] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:31:28,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:31:28,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 14:31:28,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800321366] [2023-12-02 14:31:28,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:31:28,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:31:28,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:31:28,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:31:28,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:31:28,377 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:31:28,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:31:28,392 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2023-12-02 14:31:28,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:31:28,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-12-02 14:31:28,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:31:28,394 INFO L225 Difference]: With dead ends: 8 [2023-12-02 14:31:28,394 INFO L226 Difference]: Without dead ends: 8 [2023-12-02 14:31:28,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:31:28,396 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:31:28,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 2 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:31:28,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2023-12-02 14:31:28,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2023-12-02 14:31:28,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:31:28,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2023-12-02 14:31:28,399 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 3 [2023-12-02 14:31:28,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:31:28,400 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2023-12-02 14:31:28,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:31:28,400 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2023-12-02 14:31:28,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 14:31:28,401 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:31:28,401 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 14:31:28,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 14:31:28,401 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-12-02 14:31:28,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:31:28,402 INFO L85 PathProgramCache]: Analyzing trace with hash 71351, now seen corresponding path program 1 times [2023-12-02 14:31:28,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:31:28,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182724903] [2023-12-02 14:31:28,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:31:28,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:31:28,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:31:28,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:31:28,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:31:28,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182724903] [2023-12-02 14:31:28,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182724903] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:31:28,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:31:28,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 14:31:28,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129204117] [2023-12-02 14:31:28,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:31:28,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:31:28,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:31:28,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:31:28,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:31:28,515 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:31:28,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:31:28,544 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2023-12-02 14:31:28,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 14:31:28,544 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-12-02 14:31:28,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:31:28,545 INFO L225 Difference]: With dead ends: 11 [2023-12-02 14:31:28,545 INFO L226 Difference]: Without dead ends: 11 [2023-12-02 14:31:28,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:31:28,547 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 13 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:31:28,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 5 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:31:28,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-12-02 14:31:28,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2023-12-02 14:31:28,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 8 states have internal predecessors, (9), 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) [2023-12-02 14:31:28,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2023-12-02 14:31:28,551 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 3 [2023-12-02 14:31:28,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:31:28,551 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2023-12-02 14:31:28,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:31:28,552 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2023-12-02 14:31:28,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 14:31:28,552 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:31:28,552 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 14:31:28,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 14:31:28,553 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-12-02 14:31:28,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:31:28,553 INFO L85 PathProgramCache]: Analyzing trace with hash 68567184, now seen corresponding path program 1 times [2023-12-02 14:31:28,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:31:28,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249980511] [2023-12-02 14:31:28,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:31:28,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:31:28,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:31:28,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:31:28,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:31:28,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249980511] [2023-12-02 14:31:28,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249980511] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:31:28,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851909619] [2023-12-02 14:31:28,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:31:28,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:31:28,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:31:28,788 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:31:28,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 14:31:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:31:28,849 WARN L260 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 14:31:28,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:31:28,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:31:28,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-12-02 14:31:29,041 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:31:29,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 18 treesize of output 19 [2023-12-02 14:31:29,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:31:29,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:31:29,282 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 13 treesize of output 11 [2023-12-02 14:31:29,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 20 [2023-12-02 14:31:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:31:29,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851909619] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:31:29,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1448647899] [2023-12-02 14:31:29,347 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2023-12-02 14:31:29,376 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:31:29,381 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:31:29,387 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:31:29,387 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:31:30,255 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:31:30,509 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '143#(and (= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) |ULTIMATE.start_cstrlen_~p~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc208#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 2 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc208#1.base|) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 2 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= 2 |ULTIMATE.start_cstrlen_~p~0#1.base|))' at error location [2023-12-02 14:31:30,509 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:31:30,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:31:30,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-12-02 14:31:30,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696903784] [2023-12-02 14:31:30,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:31:30,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 14:31:30,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:31:30,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 14:31:30,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-12-02 14:31:30,512 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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) [2023-12-02 14:31:30,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:31:30,696 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2023-12-02 14:31:30,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 14:31:30,696 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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 [2023-12-02 14:31:30,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:31:30,697 INFO L225 Difference]: With dead ends: 14 [2023-12-02 14:31:30,697 INFO L226 Difference]: Without dead ends: 14 [2023-12-02 14:31:30,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2023-12-02 14:31:30,699 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:31:30,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 7 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:31:30,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-12-02 14:31:30,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 11. [2023-12-02 14:31:30,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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) [2023-12-02 14:31:30,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2023-12-02 14:31:30,702 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 5 [2023-12-02 14:31:30,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:31:30,703 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2023-12-02 14:31:30,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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) [2023-12-02 14:31:30,703 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2023-12-02 14:31:30,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 14:31:30,704 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:31:30,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 14:31:30,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 14:31:30,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:31:30,912 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-12-02 14:31:30,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:31:30,913 INFO L85 PathProgramCache]: Analyzing trace with hash 2125581404, now seen corresponding path program 1 times [2023-12-02 14:31:30,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:31:30,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266095934] [2023-12-02 14:31:30,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:31:30,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:31:30,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:31:31,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:31:31,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:31:31,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266095934] [2023-12-02 14:31:31,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266095934] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:31:31,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:31:31,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 14:31:31,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116118018] [2023-12-02 14:31:31,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:31:31,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:31:31,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:31:31,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:31:31,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:31:31,036 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2023-12-02 14:31:31,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:31:31,049 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2023-12-02 14:31:31,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 14:31:31,050 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2023-12-02 14:31:31,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:31:31,050 INFO L225 Difference]: With dead ends: 10 [2023-12-02 14:31:31,051 INFO L226 Difference]: Without dead ends: 8 [2023-12-02 14:31:31,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:31:31,052 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:31:31,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:31:31,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2023-12-02 14:31:31,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2023-12-02 14:31:31,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:31:31,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2023-12-02 14:31:31,055 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2023-12-02 14:31:31,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:31:31,055 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2023-12-02 14:31:31,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2023-12-02 14:31:31,056 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2023-12-02 14:31:31,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 14:31:31,056 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:31:31,056 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2023-12-02 14:31:31,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 14:31:31,057 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-12-02 14:31:31,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:31:31,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1468553257, now seen corresponding path program 2 times [2023-12-02 14:31:31,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:31:31,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942590454] [2023-12-02 14:31:31,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:31:31,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:31:31,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:31:31,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:31:31,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:31:31,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942590454] [2023-12-02 14:31:31,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942590454] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:31:31,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138188915] [2023-12-02 14:31:31,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:31:31,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:31:31,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:31:31,510 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:31:31,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 14:31:31,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 14:31:31,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:31:31,572 WARN L260 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-02 14:31:31,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:31:31,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-02 14:31:31,750 INFO L349 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2023-12-02 14:31:31,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 23 [2023-12-02 14:31:31,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:31:31,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:31:31,999 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 29 treesize of output 25 [2023-12-02 14:31:32,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 [2023-12-02 14:31:32,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2023-12-02 14:31:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:31:32,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138188915] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:31:32,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [146557266] [2023-12-02 14:31:32,044 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2023-12-02 14:31:32,044 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:31:32,044 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:31:32,044 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:31:32,045 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:31:32,447 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:31:32,740 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '257#(and (= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) |ULTIMATE.start_cstrlen_~p~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc208#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 2 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc208#1.base|) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 2 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= 2 |ULTIMATE.start_cstrlen_~p~0#1.base|))' at error location [2023-12-02 14:31:32,740 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:31:32,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:31:32,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-12-02 14:31:32,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372415038] [2023-12-02 14:31:32,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:31:32,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 14:31:32,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:31:32,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 14:31:32,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2023-12-02 14:31:32,743 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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) [2023-12-02 14:31:33,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:31:33,235 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2023-12-02 14:31:33,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 14:31:33,235 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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) Word has length 7 [2023-12-02 14:31:33,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:31:33,236 INFO L225 Difference]: With dead ends: 13 [2023-12-02 14:31:33,236 INFO L226 Difference]: Without dead ends: 13 [2023-12-02 14:31:33,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2023-12-02 14:31:33,237 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 18 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:31:33,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 0 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:31:33,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-12-02 14:31:33,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2023-12-02 14:31:33,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 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) [2023-12-02 14:31:33,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2023-12-02 14:31:33,240 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 7 [2023-12-02 14:31:33,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:31:33,240 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2023-12-02 14:31:33,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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) [2023-12-02 14:31:33,241 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2023-12-02 14:31:33,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 14:31:33,241 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:31:33,241 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1] [2023-12-02 14:31:33,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 14:31:33,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:31:33,442 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-12-02 14:31:33,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:31:33,443 INFO L85 PathProgramCache]: Analyzing trace with hash 768446619, now seen corresponding path program 3 times [2023-12-02 14:31:33,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:31:33,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081786300] [2023-12-02 14:31:33,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:31:33,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:31:33,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:31:33,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:31:33,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:31:33,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081786300] [2023-12-02 14:31:33,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081786300] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:31:33,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748799126] [2023-12-02 14:31:33,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 14:31:33,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:31:33,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:31:33,892 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:31:33,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 14:31:33,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 14:31:33,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:31:33,960 WARN L260 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-02 14:31:33,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:31:33,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-12-02 14:31:34,548 INFO L349 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2023-12-02 14:31:34,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 51 [2023-12-02 14:31:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:31:34,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:31:35,177 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 59 treesize of output 51 [2023-12-02 14:31:35,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 77 [2023-12-02 14:31:35,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 9 [2023-12-02 14:31:35,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:31:35,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748799126] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:31:35,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1976590970] [2023-12-02 14:31:35,224 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2023-12-02 14:31:35,225 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:31:35,225 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:31:35,225 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:31:35,225 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:31:35,627 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:31:36,074 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '389#(and (= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) |ULTIMATE.start_cstrlen_~p~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc208#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 2 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc208#1.base|) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 2 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= 2 |ULTIMATE.start_cstrlen_~p~0#1.base|))' at error location [2023-12-02 14:31:36,074 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:31:36,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:31:36,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 26 [2023-12-02 14:31:36,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156715902] [2023-12-02 14:31:36,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:31:36,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 14:31:36,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:31:36,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 14:31:36,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2023-12-02 14:31:36,077 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 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) [2023-12-02 14:31:37,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:31:37,725 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2023-12-02 14:31:37,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 14:31:37,725 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 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 11 [2023-12-02 14:31:37,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:31:37,726 INFO L225 Difference]: With dead ends: 21 [2023-12-02 14:31:37,726 INFO L226 Difference]: Without dead ends: 21 [2023-12-02 14:31:37,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=341, Invalid=1821, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 14:31:37,728 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:31:37,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 0 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 14:31:37,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-02 14:31:37,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2023-12-02 14:31:37,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 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) [2023-12-02 14:31:37,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2023-12-02 14:31:37,732 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 11 [2023-12-02 14:31:37,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:31:37,732 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2023-12-02 14:31:37,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 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) [2023-12-02 14:31:37,732 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2023-12-02 14:31:37,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 14:31:37,733 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:31:37,733 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1] [2023-12-02 14:31:37,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 14:31:37,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:31:37,934 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-12-02 14:31:37,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:31:37,934 INFO L85 PathProgramCache]: Analyzing trace with hash 889448063, now seen corresponding path program 4 times [2023-12-02 14:31:37,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:31:37,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877363339] [2023-12-02 14:31:37,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:31:37,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:31:37,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:31:38,640 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:31:38,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:31:38,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877363339] [2023-12-02 14:31:38,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877363339] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:31:38,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361521368] [2023-12-02 14:31:38,641 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 14:31:38,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:31:38,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:31:38,642 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:31:38,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 14:31:38,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:31:38,699 WARN L260 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 78 conjunts are in the unsatisfiable core [2023-12-02 14:31:38,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:31:38,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-12-02 14:33:15,271 INFO L349 Elim1Store]: treesize reduction 28, result has 56.9 percent of original size [2023-12-02 14:33:15,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 8 case distinctions, treesize of input 88 treesize of output 71 [2023-12-02 14:33:15,280 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-12-02 14:33:15,297 WARN L667 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-12-02 14:33:15,388 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 3 proven. 15 refuted. 46 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:33:15,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:33:17,029 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 119 treesize of output 103 [2023-12-02 14:33:17,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 [2023-12-02 14:33:17,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 89 [2023-12-02 14:33:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:33:17,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361521368] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:33:17,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1316042107] [2023-12-02 14:33:17,100 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2023-12-02 14:33:17,101 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:33:17,101 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:33:17,101 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:33:17,101 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:33:17,530 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:33:18,576 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '620#(and (= |ULTIMATE.start_cstrlen_#in~s#1.offset| 0) (<= 1 |#StackHeapBarrier|) (<= (select |#length| |ULTIMATE.start_cstrlen_~p~0#1.base|) |ULTIMATE.start_cstrlen_~p~0#1.offset|) (= |ULTIMATE.start_main_#t~malloc208#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 2 |ULTIMATE.start_cstrlen_#in~s#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc208#1.base|) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 2 |ULTIMATE.start_cstrlen_~s#1.base|) (<= 0 |ULTIMATE.start_cstrlen_~p~0#1.offset|) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (= |ULTIMATE.start_cstrlen_~s#1.offset| 0) (<= 2 |ULTIMATE.start_cstrlen_~p~0#1.base|))' at error location [2023-12-02 14:33:18,576 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:33:18,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:33:18,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18, 18] total 45 [2023-12-02 14:33:18,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734835690] [2023-12-02 14:33:18,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:33:18,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-02 14:33:18,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:33:18,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-02 14:33:18,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=2082, Unknown=63, NotChecked=0, Total=2450 [2023-12-02 14:33:18,581 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 47 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 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) [2023-12-02 14:33:22,475 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:33:28,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:33:34,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:33:36,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:33:38,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:33:40,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:33:48,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:33:50,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:33:57,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:33:59,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:34:01,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:34:03,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:34:05,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:34:07,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:34:21,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:34:23,337 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:34:25,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:34:31,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:34:33,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:34:46,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:34:48,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:34:53,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:35:06,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:35:06,901 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2023-12-02 14:35:06,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 14:35:06,901 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 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 19 [2023-12-02 14:35:06,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:35:06,902 INFO L225 Difference]: With dead ends: 20 [2023-12-02 14:35:06,902 INFO L226 Difference]: Without dead ends: 0 [2023-12-02 14:35:06,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 9 SyntacticMatches, 9 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 154.4s TimeCoverageRelationStatistics Valid=765, Invalid=3829, Unknown=98, NotChecked=0, Total=4692 [2023-12-02 14:35:06,905 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 10 mSolverCounterUnsat, 33 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 33 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.6s IncrementalHoareTripleChecker+Time [2023-12-02 14:35:06,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 0 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 355 Invalid, 33 Unknown, 0 Unchecked, 52.6s Time] [2023-12-02 14:35:06,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-02 14:35:06,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-02 14:35:06,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2023-12-02 14:35:06,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-02 14:35:06,906 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2023-12-02 14:35:06,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:35:06,906 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-02 14:35:06,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 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) [2023-12-02 14:35:06,907 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-02 14:35:06,907 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-02 14:35:06,909 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 5 remaining) [2023-12-02 14:35:06,910 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 5 remaining) [2023-12-02 14:35:06,910 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 5 remaining) [2023-12-02 14:35:06,910 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 5 remaining) [2023-12-02 14:35:06,910 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (0 of 5 remaining) [2023-12-02 14:35:06,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 14:35:07,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:35:07,115 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1] [2023-12-02 14:35:07,117 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 14:35:07,119 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 02:35:07 BoogieIcfgContainer [2023-12-02 14:35:07,119 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 14:35:07,120 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 14:35:07,120 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 14:35:07,120 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 14:35:07,120 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:31:27" (3/4) ... [2023-12-02 14:35:07,121 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-12-02 14:35:07,127 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2023-12-02 14:35:07,128 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-12-02 14:35:07,128 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-12-02 14:35:07,128 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-12-02 14:35:07,192 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 14:35:07,193 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/witness.yml [2023-12-02 14:35:07,193 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 14:35:07,194 INFO L158 Benchmark]: Toolchain (without parser) took 220329.91ms. Allocated memory was 151.0MB in the beginning and 318.8MB in the end (delta: 167.8MB). Free memory was 106.8MB in the beginning and 241.5MB in the end (delta: -134.7MB). Peak memory consumption was 33.5MB. Max. memory is 16.1GB. [2023-12-02 14:35:07,194 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 104.9MB. Free memory is still 51.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 14:35:07,195 INFO L158 Benchmark]: CACSL2BoogieTranslator took 427.70ms. Allocated memory is still 151.0MB. Free memory was 106.3MB in the beginning and 88.7MB in the end (delta: 17.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-12-02 14:35:07,195 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.79ms. Allocated memory is still 151.0MB. Free memory was 88.7MB in the beginning and 87.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 14:35:07,196 INFO L158 Benchmark]: Boogie Preprocessor took 22.82ms. Allocated memory is still 151.0MB. Free memory was 87.0MB in the beginning and 85.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 14:35:07,196 INFO L158 Benchmark]: RCFGBuilder took 320.93ms. Allocated memory is still 151.0MB. Free memory was 85.8MB in the beginning and 114.1MB in the end (delta: -28.3MB). Peak memory consumption was 9.1MB. Max. memory is 16.1GB. [2023-12-02 14:35:07,196 INFO L158 Benchmark]: TraceAbstraction took 219436.23ms. Allocated memory was 151.0MB in the beginning and 318.8MB in the end (delta: 167.8MB). Free memory was 114.1MB in the beginning and 245.9MB in the end (delta: -131.9MB). Peak memory consumption was 34.9MB. Max. memory is 16.1GB. [2023-12-02 14:35:07,197 INFO L158 Benchmark]: Witness Printer took 73.77ms. Allocated memory is still 318.8MB. Free memory was 245.9MB in the beginning and 241.5MB in the end (delta: 4.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-12-02 14:35:07,199 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 104.9MB. Free memory is still 51.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 427.70ms. Allocated memory is still 151.0MB. Free memory was 106.3MB in the beginning and 88.7MB in the end (delta: 17.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.79ms. Allocated memory is still 151.0MB. Free memory was 88.7MB in the beginning and 87.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.82ms. Allocated memory is still 151.0MB. Free memory was 87.0MB in the beginning and 85.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 320.93ms. Allocated memory is still 151.0MB. Free memory was 85.8MB in the beginning and 114.1MB in the end (delta: -28.3MB). Peak memory consumption was 9.1MB. Max. memory is 16.1GB. * TraceAbstraction took 219436.23ms. Allocated memory was 151.0MB in the beginning and 318.8MB in the end (delta: 167.8MB). Free memory was 114.1MB in the beginning and 245.9MB in the end (delta: -131.9MB). Peak memory consumption was 34.9MB. Max. memory is 16.1GB. * Witness Printer took 73.77ms. Allocated memory is still 318.8MB. Free memory was 245.9MB in the beginning and 241.5MB in the end (delta: 4.5MB). Peak memory consumption was 4.2MB. 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 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 371]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 219.4s, OverallIterations: 9, TraceHistogramMax: 8, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 110.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 mSolverCounterUnknown, 170 SdHoareTripleChecker+Valid, 53.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 170 mSDsluCounter, 28 SdHoareTripleChecker+Invalid, 52.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 9 mSDsCounter, 24 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 694 IncrementalHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 24 mSolverCounterUnsat, 19 mSDtfsCounter, 694 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 202 GetRequests, 17 SyntacticMatches, 17 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 158.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=8, InterpolantAutomatonStates: 75, 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, 9 MinimizatonAttempts, 7 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 102.9s InterpolantComputationTime, 100 NumberOfCodeBlocks, 100 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 125 ConstructedInterpolants, 26 QuantifiedInterpolants, 3808 SizeOfPredicates, 50 NumberOfNonLiveVariables, 349 ConjunctsInSsa, 196 ConjunctsInUnsatCore, 17 InterpolantComputations, 5 PerfectInterpolantSequences, 3/255 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 - AllSpecificationsHoldResult: All specifications hold 5 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-12-02 14:35:07,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffaf39a4-32ca-4c38-9fd0-6a5eba2bb955/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE