./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-memory-alloca/cstrlen-alloca-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/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_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-memory-alloca/cstrlen-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/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_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/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 55b7e97c43627abc3b3fb7d9c27999e540608fa7f6d0b7e81ad0fc505311daee --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 14:51:56,186 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 14:51:56,251 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2023-12-02 14:51:56,256 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 14:51:56,257 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 14:51:56,282 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 14:51:56,282 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 14:51:56,283 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 14:51:56,284 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 14:51:56,284 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 14:51:56,285 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 14:51:56,285 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 14:51:56,286 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 14:51:56,286 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 14:51:56,287 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 14:51:56,287 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 14:51:56,288 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 14:51:56,288 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 14:51:56,289 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 14:51:56,289 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 14:51:56,290 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 14:51:56,290 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 14:51:56,291 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 14:51:56,291 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 14:51:56,292 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 14:51:56,292 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 14:51:56,293 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 14:51:56,293 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 14:51:56,293 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 14:51:56,294 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 14:51:56,294 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 14:51:56,295 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 14:51:56,295 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 14:51:56,295 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 14:51:56,296 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 14:51:56,296 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 14:51:56,296 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 14:51:56,296 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:51:56,297 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 14:51:56,297 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 14:51:56,297 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 14:51:56,297 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 14:51:56,297 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 14:51:56,298 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 14:51:56,298 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 14:51:56,298 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_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 55b7e97c43627abc3b3fb7d9c27999e540608fa7f6d0b7e81ad0fc505311daee [2023-12-02 14:51:56,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 14:51:56,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 14:51:56,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 14:51:56,551 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 14:51:56,551 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 14:51:56,552 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/termination-memory-alloca/cstrlen-alloca-1.i [2023-12-02 14:51:59,345 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 14:51:59,550 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 14:51:59,551 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/sv-benchmarks/c/termination-memory-alloca/cstrlen-alloca-1.i [2023-12-02 14:51:59,564 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/data/761140c39/71d10ecc65af489688456a166d69b644/FLAGd2769343a [2023-12-02 14:51:59,576 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/data/761140c39/71d10ecc65af489688456a166d69b644 [2023-12-02 14:51:59,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 14:51:59,581 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 14:51:59,582 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 14:51:59,582 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 14:51:59,588 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 14:51:59,589 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:51:59" (1/1) ... [2023-12-02 14:51:59,590 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18b18505 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:51:59, skipping insertion in model container [2023-12-02 14:51:59,590 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:51:59" (1/1) ... [2023-12-02 14:51:59,630 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:51:59,848 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:51:59,859 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 14:51:59,895 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:51:59,919 INFO L206 MainTranslator]: Completed translation [2023-12-02 14:51:59,920 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:51:59 WrapperNode [2023-12-02 14:51:59,920 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 14:51:59,921 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 14:51:59,921 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 14:51:59,921 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 14:51:59,927 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:51:59" (1/1) ... [2023-12-02 14:51:59,940 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:51:59" (1/1) ... [2023-12-02 14:51:59,957 INFO L138 Inliner]: procedures = 111, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 36 [2023-12-02 14:51:59,957 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 14:51:59,958 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 14:51:59,958 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 14:51:59,958 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 14:51:59,965 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:51:59" (1/1) ... [2023-12-02 14:51:59,965 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:51:59" (1/1) ... [2023-12-02 14:51:59,968 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:51:59" (1/1) ... [2023-12-02 14:51:59,968 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:51:59" (1/1) ... [2023-12-02 14:51:59,973 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:51:59" (1/1) ... [2023-12-02 14:51:59,977 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:51:59" (1/1) ... [2023-12-02 14:51:59,978 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:51:59" (1/1) ... [2023-12-02 14:51:59,980 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:51:59" (1/1) ... [2023-12-02 14:51:59,982 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 14:51:59,983 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 14:51:59,983 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 14:51:59,983 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 14:51:59,984 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:51:59" (1/1) ... [2023-12-02 14:51:59,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:51:59,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:52:00,010 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 14:52:00,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 14:52:00,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 14:52:00,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 14:52:00,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 14:52:00,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 14:52:00,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 14:52:00,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 14:52:00,153 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 14:52:00,155 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 14:52:00,255 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 14:52:00,293 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 14:52:00,294 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 14:52:00,296 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:52:00 BoogieIcfgContainer [2023-12-02 14:52:00,296 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 14:52:00,298 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 14:52:00,299 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 14:52:00,301 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 14:52:00,302 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:51:59" (1/3) ... [2023-12-02 14:52:00,302 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@443d0b03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:52:00, skipping insertion in model container [2023-12-02 14:52:00,302 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:51:59" (2/3) ... [2023-12-02 14:52:00,303 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@443d0b03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:52:00, skipping insertion in model container [2023-12-02 14:52:00,303 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:52:00" (3/3) ... [2023-12-02 14:52:00,305 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrlen-alloca-1.i [2023-12-02 14:52:00,320 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 14:52:00,321 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-12-02 14:52:00,359 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:52:00,365 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;@13b003fa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:52:00,366 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-12-02 14:52:00,369 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 14:52:00,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-12-02 14:52:00,375 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:52:00,376 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-12-02 14:52:00,377 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 14:52:00,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:52:00,382 INFO L85 PathProgramCache]: Analyzing trace with hash 2274, now seen corresponding path program 1 times [2023-12-02 14:52:00,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:52:00,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757168191] [2023-12-02 14:52:00,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:52:00,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:52:00,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:52:00,572 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 14:52:00,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:52:00,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757168191] [2023-12-02 14:52:00,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757168191] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:52:00,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:52:00,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 14:52:00,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150681487] [2023-12-02 14:52:00,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:52:00,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:52:00,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:52:00,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:52:00,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:52:00,606 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 14:52:00,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:52:00,637 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2023-12-02 14:52:00,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:52:00,639 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 14:52:00,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:52:00,645 INFO L225 Difference]: With dead ends: 11 [2023-12-02 14:52:00,645 INFO L226 Difference]: Without dead ends: 10 [2023-12-02 14:52:00,647 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 14:52:00,650 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 14:52:00,651 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 14:52:00,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-12-02 14:52:00,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-12-02 14:52:00,672 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 14:52:00,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2023-12-02 14:52:00,673 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 2 [2023-12-02 14:52:00,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:52:00,674 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2023-12-02 14:52:00,674 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 14:52:00,674 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2023-12-02 14:52:00,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-12-02 14:52:00,698 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:52:00,698 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-12-02 14:52:00,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 14:52:00,699 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 14:52:00,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:52:00,703 INFO L85 PathProgramCache]: Analyzing trace with hash 2275, now seen corresponding path program 1 times [2023-12-02 14:52:00,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:52:00,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357723657] [2023-12-02 14:52:00,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:52:00,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:52:00,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:52:00,924 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 14:52:00,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:52:00,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357723657] [2023-12-02 14:52:00,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357723657] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:52:00,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:52:00,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 14:52:00,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591637007] [2023-12-02 14:52:00,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:52:00,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:52:00,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:52:00,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:52:00,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:52:00,928 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 14:52:00,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:52:00,942 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2023-12-02 14:52:00,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:52:00,943 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 14:52:00,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:52:00,943 INFO L225 Difference]: With dead ends: 9 [2023-12-02 14:52:00,943 INFO L226 Difference]: Without dead ends: 9 [2023-12-02 14:52:00,944 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 14:52:00,945 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 14:52:00,946 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 14:52:00,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-12-02 14:52:00,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2023-12-02 14:52:00,948 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 14:52:00,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2023-12-02 14:52:00,949 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 2 [2023-12-02 14:52:00,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:52:00,950 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2023-12-02 14:52:00,950 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 14:52:00,950 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2023-12-02 14:52:00,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 14:52:00,950 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:52:00,951 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 14:52:00,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 14:52:00,951 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 14:52:00,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:52:00,952 INFO L85 PathProgramCache]: Analyzing trace with hash 71288, now seen corresponding path program 1 times [2023-12-02 14:52:00,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:52:00,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536574729] [2023-12-02 14:52:00,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:52:00,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:52:00,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:52:01,020 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 14:52:01,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:52:01,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536574729] [2023-12-02 14:52:01,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536574729] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:52:01,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:52:01,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 14:52:01,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540736562] [2023-12-02 14:52:01,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:52:01,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:52:01,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:52:01,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:52:01,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:52:01,024 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 14:52:01,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:52:01,040 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2023-12-02 14:52:01,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:52:01,041 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 14:52:01,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:52:01,042 INFO L225 Difference]: With dead ends: 8 [2023-12-02 14:52:01,042 INFO L226 Difference]: Without dead ends: 8 [2023-12-02 14:52:01,042 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 14:52:01,044 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 14:52:01,044 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 14:52:01,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2023-12-02 14:52:01,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2023-12-02 14:52:01,047 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 14:52:01,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2023-12-02 14:52:01,047 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 3 [2023-12-02 14:52:01,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:52:01,048 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2023-12-02 14:52:01,048 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 14:52:01,048 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2023-12-02 14:52:01,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 14:52:01,049 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:52:01,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 14:52:01,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 14:52:01,049 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 14:52:01,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:52:01,050 INFO L85 PathProgramCache]: Analyzing trace with hash 71289, now seen corresponding path program 1 times [2023-12-02 14:52:01,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:52:01,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783788724] [2023-12-02 14:52:01,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:52:01,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:52:01,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:52:01,213 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 14:52:01,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:52:01,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783788724] [2023-12-02 14:52:01,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783788724] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:52:01,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:52:01,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 14:52:01,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109947112] [2023-12-02 14:52:01,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:52:01,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:52:01,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:52:01,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:52:01,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:52:01,217 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 14:52:01,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:52:01,257 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2023-12-02 14:52:01,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 14:52:01,258 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 14:52:01,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:52:01,259 INFO L225 Difference]: With dead ends: 9 [2023-12-02 14:52:01,259 INFO L226 Difference]: Without dead ends: 9 [2023-12-02 14:52:01,259 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 14:52:01,261 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 10 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:52:01,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 3 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:52:01,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-12-02 14:52:01,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2023-12-02 14:52:01,264 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 14:52:01,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2023-12-02 14:52:01,265 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 3 [2023-12-02 14:52:01,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:52:01,265 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2023-12-02 14:52:01,265 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 14:52:01,266 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2023-12-02 14:52:01,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 14:52:01,266 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:52:01,266 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 14:52:01,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 14:52:01,267 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 14:52:01,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:52:01,267 INFO L85 PathProgramCache]: Analyzing trace with hash 68507602, now seen corresponding path program 1 times [2023-12-02 14:52:01,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:52:01,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688196090] [2023-12-02 14:52:01,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:52:01,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:52:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:52:01,545 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 14:52:01,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:52:01,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688196090] [2023-12-02 14:52:01,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688196090] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:52:01,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411605828] [2023-12-02 14:52:01,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:52:01,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:52:01,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:52:01,553 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:52:01,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 14:52:01,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:52:01,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 14:52:01,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:52:01,726 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 14:52:01,817 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:52:01,817 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 14:52:01,903 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 14:52:01,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:52:02,035 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 14:52:02,043 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 14:52:02,055 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 14:52:02,078 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 14:52:02,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411605828] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:52:02,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [271362841] [2023-12-02 14:52:02,094 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2023-12-02 14:52:02,094 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:52:02,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:52:02,101 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:52:02,101 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:52:02,823 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:52:03,066 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '140#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |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~malloc5#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 2 |ULTIMATE.start_cstrlen_#in~s#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 14:52:03,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:52:03,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:52:03,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-12-02 14:52:03,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739573295] [2023-12-02 14:52:03,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:52:03,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 14:52:03,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:52:03,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 14:52:03,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-12-02 14:52:03,069 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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 14:52:03,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:52:03,318 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2023-12-02 14:52:03,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 14:52:03,319 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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 14:52:03,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:52:03,320 INFO L225 Difference]: With dead ends: 14 [2023-12-02 14:52:03,320 INFO L226 Difference]: Without dead ends: 14 [2023-12-02 14:52:03,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-12-02 14:52:03,322 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 40 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:52:03,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 8 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:52:03,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-12-02 14:52:03,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 11. [2023-12-02 14:52:03,324 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 14:52:03,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2023-12-02 14:52:03,325 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 5 [2023-12-02 14:52:03,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:52:03,325 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2023-12-02 14:52:03,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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 14:52:03,325 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2023-12-02 14:52:03,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 14:52:03,326 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:52:03,326 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 14:52:03,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 14:52:03,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:52:03,531 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 14:52:03,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:52:03,532 INFO L85 PathProgramCache]: Analyzing trace with hash 2123734362, now seen corresponding path program 1 times [2023-12-02 14:52:03,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:52:03,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791320988] [2023-12-02 14:52:03,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:52:03,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:52:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:52:03,607 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 14:52:03,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:52:03,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791320988] [2023-12-02 14:52:03,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791320988] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:52:03,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:52:03,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 14:52:03,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263443457] [2023-12-02 14:52:03,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:52:03,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:52:03,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:52:03,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:52:03,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:52:03,610 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 14:52:03,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:52:03,620 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2023-12-02 14:52:03,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 14:52:03,621 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 14:52:03,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:52:03,622 INFO L225 Difference]: With dead ends: 10 [2023-12-02 14:52:03,622 INFO L226 Difference]: Without dead ends: 8 [2023-12-02 14:52:03,622 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 14:52:03,623 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 14:52:03,623 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 14:52:03,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2023-12-02 14:52:03,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2023-12-02 14:52:03,625 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 14:52:03,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2023-12-02 14:52:03,626 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2023-12-02 14:52:03,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:52:03,626 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2023-12-02 14:52:03,626 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 14:52:03,626 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2023-12-02 14:52:03,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 14:52:03,627 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:52:03,627 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2023-12-02 14:52:03,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 14:52:03,627 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 14:52:03,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:52:03,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1411294955, now seen corresponding path program 2 times [2023-12-02 14:52:03,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:52:03,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832016657] [2023-12-02 14:52:03,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:52:03,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:52:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:52:04,028 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 14:52:04,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:52:04,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832016657] [2023-12-02 14:52:04,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832016657] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:52:04,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873014594] [2023-12-02 14:52:04,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:52:04,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:52:04,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:52:04,030 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:52:04,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 14:52:04,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 14:52:04,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:52:04,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 14:52:04,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:52:04,125 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 14:52:04,345 INFO L349 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2023-12-02 14:52:04,345 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 28 treesize of output 29 [2023-12-02 14:52:04,430 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 14:52:04,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:52:04,646 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 14:52:04,652 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 14:52:04,661 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 45 treesize of output 39 [2023-12-02 14:52:04,679 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 14:52:04,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873014594] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:52:04,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1290121459] [2023-12-02 14:52:04,681 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2023-12-02 14:52:04,681 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:52:04,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:52:04,682 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:52:04,682 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:52:05,180 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:52:05,471 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '253#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |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~malloc5#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 2 |ULTIMATE.start_cstrlen_#in~s#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 14:52:05,471 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:52:05,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:52:05,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-12-02 14:52:05,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198103718] [2023-12-02 14:52:05,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:52:05,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 14:52:05,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:52:05,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 14:52:05,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2023-12-02 14:52:05,474 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:52:06,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:52:06,102 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2023-12-02 14:52:06,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 14:52:06,103 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 14:52:06,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:52:06,104 INFO L225 Difference]: With dead ends: 13 [2023-12-02 14:52:06,104 INFO L226 Difference]: Without dead ends: 13 [2023-12-02 14:52:06,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2023-12-02 14:52:06,105 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:52:06,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 0 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:52:06,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-12-02 14:52:06,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2023-12-02 14:52:06,107 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 14:52:06,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2023-12-02 14:52:06,108 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 7 [2023-12-02 14:52:06,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:52:06,108 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2023-12-02 14:52:06,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:52:06,108 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2023-12-02 14:52:06,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 14:52:06,109 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:52:06,109 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1] [2023-12-02 14:52:06,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 14:52:06,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:52:06,310 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 14:52:06,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:52:06,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1161473629, now seen corresponding path program 3 times [2023-12-02 14:52:06,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:52:06,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544730129] [2023-12-02 14:52:06,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:52:06,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:52:06,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:52:06,709 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 14:52:06,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:52:06,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544730129] [2023-12-02 14:52:06,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544730129] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:52:06,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223774468] [2023-12-02 14:52:06,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 14:52:06,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:52:06,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:52:06,713 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:52:06,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 14:52:06,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 14:52:06,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:52:06,781 WARN L260 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-02 14:52:06,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:52:06,792 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 14:52:06,816 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 14:52:07,238 INFO L349 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2023-12-02 14:52:07,239 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 41 treesize of output 39 [2023-12-02 14:52:07,313 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 14:52:07,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:52:07,775 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 14:52:07,785 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 59 treesize of output 45 [2023-12-02 14:52:07,833 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 14:52:07,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223774468] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:52:07,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1472804575] [2023-12-02 14:52:07,835 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2023-12-02 14:52:07,835 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:52:07,835 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:52:07,835 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:52:07,835 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:52:08,221 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:52:08,638 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '389#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |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~malloc5#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 2 |ULTIMATE.start_cstrlen_#in~s#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 14:52:08,638 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:52:08,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:52:08,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2023-12-02 14:52:08,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482115746] [2023-12-02 14:52:08,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:52:08,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-02 14:52:08,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:52:08,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-02 14:52:08,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 14:52:08,641 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 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 14:52:09,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:52:09,941 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2023-12-02 14:52:09,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 14:52:09,942 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 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 14:52:09,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:52:09,943 INFO L225 Difference]: With dead ends: 21 [2023-12-02 14:52:09,943 INFO L226 Difference]: Without dead ends: 21 [2023-12-02 14:52:09,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=395, Invalid=2055, Unknown=0, NotChecked=0, Total=2450 [2023-12-02 14:52:09,945 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:52:09,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 0 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 14:52:09,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-02 14:52:09,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2023-12-02 14:52:09,948 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 14:52:09,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2023-12-02 14:52:09,948 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 11 [2023-12-02 14:52:09,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:52:09,948 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2023-12-02 14:52:09,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 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 14:52:09,949 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2023-12-02 14:52:09,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 14:52:09,949 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:52:09,950 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1] [2023-12-02 14:52:09,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 14:52:10,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 14:52:10,150 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 14:52:10,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:52:10,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1411374527, now seen corresponding path program 4 times [2023-12-02 14:52:10,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:52:10,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707368957] [2023-12-02 14:52:10,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:52:10,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:52:10,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:52:10,858 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 14:52:10,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:52:10,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707368957] [2023-12-02 14:52:10,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707368957] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 14:52:10,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179558238] [2023-12-02 14:52:10,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 14:52:10,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:52:10,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:52:10,859 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:52:10,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 14:52:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:52:10,915 WARN L260 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 76 conjunts are in the unsatisfiable core [2023-12-02 14:52:10,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:52:10,941 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 14:53:31,078 INFO L349 Elim1Store]: treesize reduction 28, result has 56.9 percent of original size [2023-12-02 14:53:31,078 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 14:53:31,085 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-12-02 14:53:31,098 WARN L667 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-12-02 14:53:31,172 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 9 proven. 15 refuted. 40 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:53:31,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:53:32,604 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 14:53:32,610 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 14:53:32,625 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 14:53:32,669 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 14:53:32,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179558238] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:53:32,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [139179146] [2023-12-02 14:53:32,671 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2023-12-02 14:53:32,671 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 14:53:32,671 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 14:53:32,671 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 14:53:32,671 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 14:53:32,980 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 14:53:33,815 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '623#(and (<= 2 |ULTIMATE.start_main_#t~malloc5#1.base|) (= |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~malloc5#1.offset| 0) (<= 1 |ULTIMATE.start_main_~length1~0#1|) (<= 2 |ULTIMATE.start_cstrlen_#in~s#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 14:53:33,815 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 14:53:33,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 14:53:33,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 18] total 46 [2023-12-02 14:53:33,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729960294] [2023-12-02 14:53:33,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 14:53:33,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-02 14:53:33,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:53:33,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-02 14:53:33,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=2177, Unknown=53, NotChecked=0, Total=2550 [2023-12-02 14:53:33,818 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 48 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 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 14:53:57,574 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 14:53:59,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:54:08,561 WARN L539 Checker$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 14:54:14,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:54:18,843 WARN L539 Checker$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 14:54:24,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:54:26,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:54:27,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:54:33,003 WARN L539 Checker$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 14:54:35,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:54:41,500 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 14:54:41,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:54:41,545 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2023-12-02 14:54:41,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 14:54:41,545 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 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 14:54:41,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:54:41,546 INFO L225 Difference]: With dead ends: 20 [2023-12-02 14:54:41,546 INFO L226 Difference]: Without dead ends: 0 [2023-12-02 14:54:41,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 9 SyntacticMatches, 9 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 121.2s TimeCoverageRelationStatistics Valid=784, Invalid=3969, Unknown=77, NotChecked=0, Total=4830 [2023-12-02 14:54:41,548 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 0 mSolverCounterUnsat, 25 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 25 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.5s IncrementalHoareTripleChecker+Time [2023-12-02 14:54:41,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 0 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 342 Invalid, 25 Unknown, 0 Unchecked, 28.5s Time] [2023-12-02 14:54:41,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-02 14:54:41,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-02 14:54:41,549 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 14:54:41,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-02 14:54:41,549 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2023-12-02 14:54:41,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:54:41,549 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-02 14:54:41,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 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 14:54:41,549 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-02 14:54:41,549 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-02 14:54:41,551 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 5 remaining) [2023-12-02 14:54:41,552 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 5 remaining) [2023-12-02 14:54:41,552 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 5 remaining) [2023-12-02 14:54:41,552 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 5 remaining) [2023-12-02 14:54:41,552 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (0 of 5 remaining) [2023-12-02 14:54:41,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 14:54:41,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:54:41,755 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1] [2023-12-02 14:54:41,757 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 14:54:41,759 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 02:54:41 BoogieIcfgContainer [2023-12-02 14:54:41,759 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 14:54:41,759 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 14:54:41,759 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 14:54:41,759 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 14:54:41,760 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:52:00" (3/4) ... [2023-12-02 14:54:41,761 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-12-02 14:54:41,767 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2023-12-02 14:54:41,768 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-12-02 14:54:41,768 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-12-02 14:54:41,768 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-12-02 14:54:41,847 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 14:54:41,848 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/witness.yml [2023-12-02 14:54:41,848 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 14:54:41,849 INFO L158 Benchmark]: Toolchain (without parser) took 162268.19ms. Allocated memory was 184.5MB in the beginning and 262.1MB in the end (delta: 77.6MB). Free memory was 134.9MB in the beginning and 78.6MB in the end (delta: 56.3MB). Peak memory consumption was 134.2MB. Max. memory is 16.1GB. [2023-12-02 14:54:41,849 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 184.5MB. Free memory was 157.5MB in the beginning and 157.4MB in the end (delta: 90.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 14:54:41,850 INFO L158 Benchmark]: CACSL2BoogieTranslator took 337.87ms. Allocated memory is still 184.5MB. Free memory was 134.8MB in the beginning and 118.9MB in the end (delta: 15.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-12-02 14:54:41,850 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.39ms. Allocated memory is still 184.5MB. Free memory was 118.9MB in the beginning and 117.0MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 14:54:41,851 INFO L158 Benchmark]: Boogie Preprocessor took 24.49ms. Allocated memory is still 184.5MB. Free memory was 117.0MB in the beginning and 115.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 14:54:41,851 INFO L158 Benchmark]: RCFGBuilder took 313.08ms. Allocated memory is still 184.5MB. Free memory was 115.7MB in the beginning and 102.8MB in the end (delta: 12.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-12-02 14:54:41,852 INFO L158 Benchmark]: TraceAbstraction took 161460.53ms. Allocated memory was 184.5MB in the beginning and 262.1MB in the end (delta: 77.6MB). Free memory was 102.1MB in the beginning and 82.8MB in the end (delta: 19.4MB). Peak memory consumption was 98.6MB. Max. memory is 16.1GB. [2023-12-02 14:54:41,852 INFO L158 Benchmark]: Witness Printer took 89.14ms. Allocated memory is still 262.1MB. Free memory was 82.8MB in the beginning and 78.6MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-12-02 14:54:41,854 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 184.5MB. Free memory was 157.5MB in the beginning and 157.4MB in the end (delta: 90.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 337.87ms. Allocated memory is still 184.5MB. Free memory was 134.8MB in the beginning and 118.9MB in the end (delta: 15.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.39ms. Allocated memory is still 184.5MB. Free memory was 118.9MB in the beginning and 117.0MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.49ms. Allocated memory is still 184.5MB. Free memory was 117.0MB in the beginning and 115.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 313.08ms. Allocated memory is still 184.5MB. Free memory was 115.7MB in the beginning and 102.8MB in the end (delta: 12.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 161460.53ms. Allocated memory was 184.5MB in the beginning and 262.1MB in the end (delta: 77.6MB). Free memory was 102.1MB in the beginning and 82.8MB in the end (delta: 19.4MB). Peak memory consumption was 98.6MB. Max. memory is 16.1GB. * Witness Printer took 89.14ms. Allocated memory is still 262.1MB. Free memory was 82.8MB in the beginning and 78.6MB in the end (delta: 4.2MB). 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: 554]: 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: 161.4s, OverallIterations: 9, TraceHistogramMax: 8, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 70.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 25 mSolverCounterUnknown, 198 SdHoareTripleChecker+Valid, 28.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 198 mSDsluCounter, 27 SdHoareTripleChecker+Invalid, 28.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 10 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 673 IncrementalHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 17 mSDtfsCounter, 673 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 206 GetRequests, 17 SyntacticMatches, 18 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1848 ImplicationChecksByTransitivity, 125.4s 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, 5 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 86.1s InterpolantComputationTime, 100 NumberOfCodeBlocks, 100 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 125 ConstructedInterpolants, 26 QuantifiedInterpolants, 3830 SizeOfPredicates, 50 NumberOfNonLiveVariables, 349 ConjunctsInSsa, 188 ConjunctsInUnsatCore, 17 InterpolantComputations, 5 PerfectInterpolantSequences, 9/255 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 14:54:41,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bfae8e9-c8fa-438b-ac26-986bdbdbff05/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE