./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/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_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/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 32bit --witnessprinter.graph.data.programhash f6eaec015dd6fdb220ef146938a83a65106037c982563310cbbb34d0417543f1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:16:37,442 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:16:37,507 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-12-02 19:16:37,512 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:16:37,513 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:16:37,538 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:16:37,538 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:16:37,539 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:16:37,539 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:16:37,540 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:16:37,540 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:16:37,541 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:16:37,541 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:16:37,542 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 19:16:37,542 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:16:37,543 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:16:37,543 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 19:16:37,544 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 19:16:37,544 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:16:37,545 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 19:16:37,545 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 19:16:37,546 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 19:16:37,546 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 19:16:37,547 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 19:16:37,547 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:16:37,548 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 19:16:37,548 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 19:16:37,549 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 19:16:37,549 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:16:37,549 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 19:16:37,550 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 19:16:37,550 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 19:16:37,551 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:16:37,551 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 19:16:37,551 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 19:16:37,552 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 19:16:37,552 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:16:37,553 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:16:37,553 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:16:37,553 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:16:37,553 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:16:37,554 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:16:37,554 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:16:37,554 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 19:16:37,554 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 19:16:37,555 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:16:37,555 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:16:37,555 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:16:37,555 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_0bcc0870-3089-4eab-974c-047416c31b98/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6eaec015dd6fdb220ef146938a83a65106037c982563310cbbb34d0417543f1 [2023-12-02 19:16:37,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:16:37,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:16:37,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:16:37,804 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:16:37,805 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:16:37,806 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-1.i [2023-12-02 19:16:40,634 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:16:40,886 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:16:40,886 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-1.i [2023-12-02 19:16:40,901 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/data/1dc2fc596/52c43f1774f94becb954de04b08a782d/FLAG1c72d9edc [2023-12-02 19:16:40,916 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/data/1dc2fc596/52c43f1774f94becb954de04b08a782d [2023-12-02 19:16:40,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:16:40,920 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:16:40,921 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:16:40,922 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:16:40,927 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:16:40,928 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:16:40" (1/1) ... [2023-12-02 19:16:40,929 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a796c52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:16:40, skipping insertion in model container [2023-12-02 19:16:40,929 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:16:40" (1/1) ... [2023-12-02 19:16:40,979 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:16:41,266 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:16:41,274 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 19:16:41,312 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:16:41,342 INFO L206 MainTranslator]: Completed translation [2023-12-02 19:16:41,342 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:16:41 WrapperNode [2023-12-02 19:16:41,343 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:16:41,344 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 19:16:41,344 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 19:16:41,344 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 19:16:41,352 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:16:41" (1/1) ... [2023-12-02 19:16:41,365 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:16:41" (1/1) ... [2023-12-02 19:16:41,389 INFO L138 Inliner]: procedures = 116, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 133 [2023-12-02 19:16:41,390 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 19:16:41,390 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 19:16:41,391 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 19:16:41,391 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 19:16:41,400 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:16:41" (1/1) ... [2023-12-02 19:16:41,401 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:16:41" (1/1) ... [2023-12-02 19:16:41,404 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:16:41" (1/1) ... [2023-12-02 19:16:41,405 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:16:41" (1/1) ... [2023-12-02 19:16:41,413 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:16:41" (1/1) ... [2023-12-02 19:16:41,417 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:16:41" (1/1) ... [2023-12-02 19:16:41,418 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:16:41" (1/1) ... [2023-12-02 19:16:41,420 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:16:41" (1/1) ... [2023-12-02 19:16:41,423 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 19:16:41,424 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 19:16:41,424 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 19:16:41,424 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 19:16:41,425 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:16:41" (1/1) ... [2023-12-02 19:16:41,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:16:41,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:16:41,456 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 19:16:41,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 19:16:41,489 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-12-02 19:16:41,489 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-12-02 19:16:41,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 19:16:41,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 19:16:41,490 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 19:16:41,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 19:16:41,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 19:16:41,491 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 19:16:41,593 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 19:16:41,595 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 19:16:41,624 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-12-02 19:16:41,897 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 19:16:41,932 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 19:16:41,932 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 19:16:41,934 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:16:41 BoogieIcfgContainer [2023-12-02 19:16:41,934 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 19:16:41,937 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 19:16:41,937 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 19:16:41,940 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 19:16:41,940 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:16:40" (1/3) ... [2023-12-02 19:16:41,941 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d4b02a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:16:41, skipping insertion in model container [2023-12-02 19:16:41,941 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:16:41" (2/3) ... [2023-12-02 19:16:41,941 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d4b02a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:16:41, skipping insertion in model container [2023-12-02 19:16:41,941 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:16:41" (3/3) ... [2023-12-02 19:16:41,942 INFO L112 eAbstractionObserver]: Analyzing ICFG dll_nondet_free_order-1.i [2023-12-02 19:16:41,957 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 19:16:41,958 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 62 error locations. [2023-12-02 19:16:42,000 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:16:42,006 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;@140e00d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:16:42,006 INFO L358 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2023-12-02 19:16:42,010 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 129 states have internal predecessors, (136), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:16:42,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 19:16:42,015 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:16:42,015 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 19:16:42,016 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 19:16:42,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:16:42,020 INFO L85 PathProgramCache]: Analyzing trace with hash 218566, now seen corresponding path program 1 times [2023-12-02 19:16:42,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:16:42,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781151892] [2023-12-02 19:16:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:16:42,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:16:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:16:42,211 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 19:16:42,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:16:42,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781151892] [2023-12-02 19:16:42,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781151892] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:16:42,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:16:42,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 19:16:42,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529900855] [2023-12-02 19:16:42,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:16:42,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:16:42,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:16:42,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:16:42,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:16:42,245 INFO L87 Difference]: Start difference. First operand has 131 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 129 states have internal predecessors, (136), 2 states have call successors, (2), 1 states have call predecessors, (2), 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 1.5) internal successors, (3), 2 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 19:16:42,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:16:42,357 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2023-12-02 19:16:42,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:16:42,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 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 19:16:42,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:16:42,366 INFO L225 Difference]: With dead ends: 128 [2023-12-02 19:16:42,366 INFO L226 Difference]: Without dead ends: 123 [2023-12-02 19:16:42,368 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 19:16:42,371 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 18 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:16:42,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 190 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:16:42,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-12-02 19:16:42,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2023-12-02 19:16:42,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 64 states have (on average 2.0) internal successors, (128), 122 states have internal predecessors, (128), 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 19:16:42,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 128 transitions. [2023-12-02 19:16:42,409 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 128 transitions. Word has length 3 [2023-12-02 19:16:42,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:16:42,409 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 128 transitions. [2023-12-02 19:16:42,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 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 19:16:42,410 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 128 transitions. [2023-12-02 19:16:42,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 19:16:42,410 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:16:42,410 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 19:16:42,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 19:16:42,411 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 19:16:42,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:16:42,412 INFO L85 PathProgramCache]: Analyzing trace with hash 218567, now seen corresponding path program 1 times [2023-12-02 19:16:42,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:16:42,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180314276] [2023-12-02 19:16:42,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:16:42,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:16:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:16:42,498 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 19:16:42,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:16:42,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180314276] [2023-12-02 19:16:42,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180314276] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:16:42,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:16:42,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 19:16:42,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302242399] [2023-12-02 19:16:42,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:16:42,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:16:42,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:16:42,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:16:42,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:16:42,501 INFO L87 Difference]: Start difference. First operand 123 states and 128 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 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 19:16:42,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:16:42,551 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2023-12-02 19:16:42,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:16:42,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 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 19:16:42,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:16:42,553 INFO L225 Difference]: With dead ends: 126 [2023-12-02 19:16:42,553 INFO L226 Difference]: Without dead ends: 126 [2023-12-02 19:16:42,554 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 19:16:42,555 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 6 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:16:42,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 222 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:16:42,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-12-02 19:16:42,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2023-12-02 19:16:42,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 122 states have internal predecessors, (129), 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 19:16:42,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 129 transitions. [2023-12-02 19:16:42,568 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 129 transitions. Word has length 3 [2023-12-02 19:16:42,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:16:42,568 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 129 transitions. [2023-12-02 19:16:42,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 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 19:16:42,569 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 129 transitions. [2023-12-02 19:16:42,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 19:16:42,569 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:16:42,570 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:16:42,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 19:16:42,570 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 19:16:42,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:16:42,571 INFO L85 PathProgramCache]: Analyzing trace with hash -8032980, now seen corresponding path program 1 times [2023-12-02 19:16:42,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:16:42,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751951680] [2023-12-02 19:16:42,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:16:42,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:16:42,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:16:42,654 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 19:16:42,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:16:42,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751951680] [2023-12-02 19:16:42,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751951680] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:16:42,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:16:42,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 19:16:42,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20762442] [2023-12-02 19:16:42,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:16:42,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:16:42,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:16:42,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:16:42,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:16:42,657 INFO L87 Difference]: Start difference. First operand 123 states and 129 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:16:42,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:16:42,684 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2023-12-02 19:16:42,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:16:42,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 19:16:42,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:16:42,686 INFO L225 Difference]: With dead ends: 129 [2023-12-02 19:16:42,686 INFO L226 Difference]: Without dead ends: 129 [2023-12-02 19:16:42,686 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 19:16:42,688 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 7 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:16:42,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 234 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:16:42,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-12-02 19:16:42,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 122. [2023-12-02 19:16:42,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 65 states have (on average 1.9538461538461538) internal successors, (127), 121 states have internal predecessors, (127), 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 19:16:42,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 127 transitions. [2023-12-02 19:16:42,711 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 127 transitions. Word has length 7 [2023-12-02 19:16:42,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:16:42,715 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 127 transitions. [2023-12-02 19:16:42,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:16:42,716 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 127 transitions. [2023-12-02 19:16:42,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 19:16:42,716 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:16:42,716 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:16:42,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 19:16:42,717 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 19:16:42,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:16:42,718 INFO L85 PathProgramCache]: Analyzing trace with hash -8196735, now seen corresponding path program 1 times [2023-12-02 19:16:42,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:16:42,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034600828] [2023-12-02 19:16:42,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:16:42,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:16:42,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:16:42,807 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 19:16:42,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:16:42,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034600828] [2023-12-02 19:16:42,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034600828] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:16:42,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:16:42,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 19:16:42,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309634300] [2023-12-02 19:16:42,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:16:42,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:16:42,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:16:42,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:16:42,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:16:42,810 INFO L87 Difference]: Start difference. First operand 122 states and 127 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:16:42,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:16:42,879 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2023-12-02 19:16:42,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:16:42,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 19:16:42,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:16:42,881 INFO L225 Difference]: With dead ends: 121 [2023-12-02 19:16:42,881 INFO L226 Difference]: Without dead ends: 121 [2023-12-02 19:16:42,881 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 19:16:42,882 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 4 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:16:42,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 190 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:16:42,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-12-02 19:16:42,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2023-12-02 19:16:42,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 65 states have (on average 1.9384615384615385) internal successors, (126), 120 states have internal predecessors, (126), 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 19:16:42,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2023-12-02 19:16:42,891 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 7 [2023-12-02 19:16:42,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:16:42,891 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2023-12-02 19:16:42,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:16:42,892 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2023-12-02 19:16:42,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 19:16:42,892 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:16:42,892 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:16:42,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 19:16:42,892 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 19:16:42,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:16:42,893 INFO L85 PathProgramCache]: Analyzing trace with hash -8196734, now seen corresponding path program 1 times [2023-12-02 19:16:42,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:16:42,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508991428] [2023-12-02 19:16:42,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:16:42,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:16:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:16:42,970 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 19:16:42,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:16:42,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508991428] [2023-12-02 19:16:42,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508991428] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:16:42,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:16:42,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 19:16:42,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045841991] [2023-12-02 19:16:42,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:16:42,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:16:42,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:16:42,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:16:42,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:16:42,972 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:16:43,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:16:43,009 INFO L93 Difference]: Finished difference Result 120 states and 125 transitions. [2023-12-02 19:16:43,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:16:43,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 19:16:43,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:16:43,010 INFO L225 Difference]: With dead ends: 120 [2023-12-02 19:16:43,011 INFO L226 Difference]: Without dead ends: 120 [2023-12-02 19:16:43,011 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 19:16:43,012 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 3 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:16:43,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 220 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:16:43,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-12-02 19:16:43,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2023-12-02 19:16:43,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 65 states have (on average 1.9230769230769231) internal successors, (125), 119 states have internal predecessors, (125), 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 19:16:43,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2023-12-02 19:16:43,021 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 7 [2023-12-02 19:16:43,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:16:43,022 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2023-12-02 19:16:43,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:16:43,022 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2023-12-02 19:16:43,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 19:16:43,022 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:16:43,023 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:16:43,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 19:16:43,023 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 19:16:43,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:16:43,024 INFO L85 PathProgramCache]: Analyzing trace with hash -254098774, now seen corresponding path program 1 times [2023-12-02 19:16:43,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:16:43,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928774896] [2023-12-02 19:16:43,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:16:43,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:16:43,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:16:43,149 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 19:16:43,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:16:43,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928774896] [2023-12-02 19:16:43,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928774896] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:16:43,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:16:43,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 19:16:43,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900031559] [2023-12-02 19:16:43,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:16:43,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:16:43,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:16:43,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:16:43,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:16:43,151 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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 19:16:43,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:16:43,256 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2023-12-02 19:16:43,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:16:43,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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) Word has length 8 [2023-12-02 19:16:43,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:16:43,258 INFO L225 Difference]: With dead ends: 124 [2023-12-02 19:16:43,258 INFO L226 Difference]: Without dead ends: 124 [2023-12-02 19:16:43,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:16:43,259 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 19 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:16:43,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 254 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:16:43,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-12-02 19:16:43,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2023-12-02 19:16:43,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 68 states have (on average 1.8970588235294117) internal successors, (129), 122 states have internal predecessors, (129), 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 19:16:43,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 129 transitions. [2023-12-02 19:16:43,266 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 129 transitions. Word has length 8 [2023-12-02 19:16:43,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:16:43,266 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 129 transitions. [2023-12-02 19:16:43,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 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 19:16:43,267 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 129 transitions. [2023-12-02 19:16:43,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 19:16:43,267 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:16:43,267 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:16:43,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 19:16:43,267 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 19:16:43,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:16:43,268 INFO L85 PathProgramCache]: Analyzing trace with hash -254098773, now seen corresponding path program 1 times [2023-12-02 19:16:43,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:16:43,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838044136] [2023-12-02 19:16:43,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:16:43,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:16:43,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:16:43,413 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 19:16:43,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:16:43,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838044136] [2023-12-02 19:16:43,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838044136] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:16:43,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:16:43,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 19:16:43,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647719548] [2023-12-02 19:16:43,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:16:43,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 19:16:43,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:16:43,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 19:16:43,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:16:43,416 INFO L87 Difference]: Start difference. First operand 123 states and 129 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 19:16:43,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:16:43,526 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2023-12-02 19:16:43,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:16:43,526 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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) Word has length 8 [2023-12-02 19:16:43,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:16:43,527 INFO L225 Difference]: With dead ends: 122 [2023-12-02 19:16:43,527 INFO L226 Difference]: Without dead ends: 122 [2023-12-02 19:16:43,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:16:43,529 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 16 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:16:43,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 387 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:16:43,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-12-02 19:16:43,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2023-12-02 19:16:43,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 68 states have (on average 1.8676470588235294) internal successors, (127), 121 states have internal predecessors, (127), 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 19:16:43,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 127 transitions. [2023-12-02 19:16:43,535 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 127 transitions. Word has length 8 [2023-12-02 19:16:43,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:16:43,535 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 127 transitions. [2023-12-02 19:16:43,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 19:16:43,535 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 127 transitions. [2023-12-02 19:16:43,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 19:16:43,536 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:16:43,536 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:16:43,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 19:16:43,536 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 19:16:43,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:16:43,536 INFO L85 PathProgramCache]: Analyzing trace with hash -2119448919, now seen corresponding path program 1 times [2023-12-02 19:16:43,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:16:43,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540686221] [2023-12-02 19:16:43,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:16:43,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:16:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:16:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:16:43,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:16:43,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540686221] [2023-12-02 19:16:43,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540686221] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:16:43,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:16:43,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:16:43,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908497138] [2023-12-02 19:16:43,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:16:43,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:16:43,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:16:43,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:16:43,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:16:43,589 INFO L87 Difference]: Start difference. First operand 122 states and 127 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 19:16:43,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:16:43,683 INFO L93 Difference]: Finished difference Result 120 states and 125 transitions. [2023-12-02 19:16:43,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:16:43,684 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 19:16:43,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:16:43,685 INFO L225 Difference]: With dead ends: 120 [2023-12-02 19:16:43,685 INFO L226 Difference]: Without dead ends: 120 [2023-12-02 19:16:43,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 19:16:43,686 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 6 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:16:43,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 256 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:16:43,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-12-02 19:16:43,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2023-12-02 19:16:43,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 68 states have (on average 1.838235294117647) internal successors, (125), 119 states have internal predecessors, (125), 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 19:16:43,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2023-12-02 19:16:43,703 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 11 [2023-12-02 19:16:43,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:16:43,703 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2023-12-02 19:16:43,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 19:16:43,704 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2023-12-02 19:16:43,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 19:16:43,704 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:16:43,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:16:43,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 19:16:43,705 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 19:16:43,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:16:43,705 INFO L85 PathProgramCache]: Analyzing trace with hash -2119448918, now seen corresponding path program 1 times [2023-12-02 19:16:43,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:16:43,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127177234] [2023-12-02 19:16:43,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:16:43,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:16:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:16:43,771 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 19:16:43,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:16:43,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127177234] [2023-12-02 19:16:43,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127177234] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:16:43,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378034476] [2023-12-02 19:16:43,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:16:43,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:16:43,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:16:43,781 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:16:43,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 19:16:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:16:43,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 19:16:43,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:16:43,913 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 19:16:43,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:16:43,933 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 19:16:43,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378034476] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:16:43,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1731017198] [2023-12-02 19:16:43,952 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 19:16:43,953 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:16:43,957 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:16:43,963 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:16:43,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:16:44,794 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:16:50,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1731017198] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:16:50,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:16:50,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 10 [2023-12-02 19:16:50,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416427728] [2023-12-02 19:16:50,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:16:50,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 19:16:50,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:16:50,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 19:16:50,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=79, Unknown=3, NotChecked=0, Total=110 [2023-12-02 19:16:50,134 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 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 19:16:58,035 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 19:16:59,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:16:59,764 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2023-12-02 19:16:59,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 19:16:59,765 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 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 19:16:59,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:16:59,766 INFO L225 Difference]: With dead ends: 118 [2023-12-02 19:16:59,766 INFO L226 Difference]: Without dead ends: 118 [2023-12-02 19:16:59,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=39, Invalid=112, Unknown=5, NotChecked=0, Total=156 [2023-12-02 19:16:59,767 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 2 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-12-02 19:16:59,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 352 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 467 Invalid, 3 Unknown, 0 Unchecked, 4.7s Time] [2023-12-02 19:16:59,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-12-02 19:16:59,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2023-12-02 19:16:59,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 65 states have (on average 1.8461538461538463) internal successors, (120), 114 states have internal predecessors, (120), 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 19:16:59,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 120 transitions. [2023-12-02 19:16:59,771 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 120 transitions. Word has length 11 [2023-12-02 19:16:59,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:16:59,772 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 120 transitions. [2023-12-02 19:16:59,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 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 19:16:59,772 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 120 transitions. [2023-12-02 19:16:59,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 19:16:59,773 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:16:59,773 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:16:59,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 19:16:59,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:16:59,974 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 19:16:59,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:16:59,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1278402589, now seen corresponding path program 1 times [2023-12-02 19:16:59,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:16:59,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740221494] [2023-12-02 19:16:59,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:16:59,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:16:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:17:00,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:17:00,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:17:00,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740221494] [2023-12-02 19:17:00,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740221494] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:17:00,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:17:00,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 19:17:00,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148158941] [2023-12-02 19:17:00,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:17:00,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:17:00,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:17:00,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:17:00,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:17:00,057 INFO L87 Difference]: Start difference. First operand 115 states and 120 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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 19:17:00,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:17:00,249 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2023-12-02 19:17:00,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:17:00,249 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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) Word has length 12 [2023-12-02 19:17:00,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:17:00,251 INFO L225 Difference]: With dead ends: 112 [2023-12-02 19:17:00,251 INFO L226 Difference]: Without dead ends: 112 [2023-12-02 19:17:00,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:17:00,252 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 25 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:17:00,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 283 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:17:00,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-12-02 19:17:00,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2023-12-02 19:17:00,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 65 states have (on average 1.8) internal successors, (117), 111 states have internal predecessors, (117), 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 19:17:00,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 117 transitions. [2023-12-02 19:17:00,257 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 117 transitions. Word has length 12 [2023-12-02 19:17:00,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:17:00,257 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 117 transitions. [2023-12-02 19:17:00,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 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 19:17:00,258 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 117 transitions. [2023-12-02 19:17:00,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 19:17:00,258 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:17:00,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:17:00,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 19:17:00,259 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 19:17:00,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:17:00,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1278402588, now seen corresponding path program 1 times [2023-12-02 19:17:00,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:17:00,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755365753] [2023-12-02 19:17:00,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:17:00,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:17:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:17:00,340 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 19:17:00,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:17:00,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755365753] [2023-12-02 19:17:00,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755365753] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:17:00,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346216761] [2023-12-02 19:17:00,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:17:00,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:17:00,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:17:00,343 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:17:00,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 19:17:00,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:17:00,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 19:17:00,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:17:00,486 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 19:17:00,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:17:00,518 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 19:17:00,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346216761] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:17:00,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1789408482] [2023-12-02 19:17:00,522 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-12-02 19:17:00,522 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:17:00,522 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:17:00,522 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:17:00,523 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:17:01,082 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:17:05,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1789408482] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:17:05,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:17:05,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [3, 3, 3] total 11 [2023-12-02 19:17:05,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359814725] [2023-12-02 19:17:05,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:17:05,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 19:17:05,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:17:05,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 19:17:05,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=100, Unknown=2, NotChecked=0, Total=132 [2023-12-02 19:17:05,219 INFO L87 Difference]: Start difference. First operand 112 states and 117 transitions. Second operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 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 19:17:15,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:17:15,644 INFO L93 Difference]: Finished difference Result 108 states and 113 transitions. [2023-12-02 19:17:15,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 19:17:15,645 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 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) Word has length 12 [2023-12-02 19:17:15,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:17:15,645 INFO L225 Difference]: With dead ends: 108 [2023-12-02 19:17:15,646 INFO L226 Difference]: Without dead ends: 108 [2023-12-02 19:17:15,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=41, Invalid=137, Unknown=4, NotChecked=0, Total=182 [2023-12-02 19:17:15,646 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 19 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-12-02 19:17:15,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 383 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 589 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2023-12-02 19:17:15,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-12-02 19:17:15,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2023-12-02 19:17:15,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 65 states have (on average 1.7384615384615385) internal successors, (113), 107 states have internal predecessors, (113), 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 19:17:15,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2023-12-02 19:17:15,650 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 12 [2023-12-02 19:17:15,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:17:15,650 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2023-12-02 19:17:15,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 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 19:17:15,651 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2023-12-02 19:17:15,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 19:17:15,651 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:17:15,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:17:15,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 19:17:15,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 19:17:15,852 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 19:17:15,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:17:15,853 INFO L85 PathProgramCache]: Analyzing trace with hash -826973390, now seen corresponding path program 1 times [2023-12-02 19:17:15,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:17:15,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686890743] [2023-12-02 19:17:15,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:17:15,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:17:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:17:15,954 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 19:17:15,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:17:15,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686890743] [2023-12-02 19:17:15,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686890743] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:17:15,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276753700] [2023-12-02 19:17:15,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:17:15,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:17:15,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:17:15,956 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:17:15,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 19:17:16,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:17:16,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 19:17:16,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:17:16,092 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 19:17:16,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:17:16,119 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 19:17:16,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276753700] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:17:16,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1453643406] [2023-12-02 19:17:16,122 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-12-02 19:17:16,122 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:17:16,122 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:17:16,122 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:17:16,122 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:17:16,716 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:17:25,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1453643406] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:17:25,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:17:25,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [3, 3, 3] total 15 [2023-12-02 19:17:25,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319050605] [2023-12-02 19:17:25,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:17:25,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 19:17:25,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:17:25,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 19:17:25,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=190, Unknown=3, NotChecked=0, Total=240 [2023-12-02 19:17:25,671 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:17:34,019 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 19:17:37,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:17:37,494 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2023-12-02 19:17:37,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 19:17:37,494 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-02 19:17:37,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:17:37,495 INFO L225 Difference]: With dead ends: 102 [2023-12-02 19:17:37,495 INFO L226 Difference]: Without dead ends: 102 [2023-12-02 19:17:37,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=58, Invalid=243, Unknown=5, NotChecked=0, Total=306 [2023-12-02 19:17:37,496 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 18 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:17:37,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 271 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 563 Invalid, 3 Unknown, 0 Unchecked, 7.2s Time] [2023-12-02 19:17:37,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-12-02 19:17:37,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2023-12-02 19:17:37,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 65 states have (on average 1.646153846153846) internal successors, (107), 101 states have internal predecessors, (107), 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 19:17:37,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2023-12-02 19:17:37,499 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 16 [2023-12-02 19:17:37,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:17:37,499 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2023-12-02 19:17:37,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:17:37,500 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2023-12-02 19:17:37,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 19:17:37,500 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:17:37,500 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:17:37,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 19:17:37,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:17:37,701 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 19:17:37,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:17:37,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1593061571, now seen corresponding path program 1 times [2023-12-02 19:17:37,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:17:37,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504796549] [2023-12-02 19:17:37,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:17:37,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:17:37,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:17:37,770 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 19:17:37,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:17:37,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504796549] [2023-12-02 19:17:37,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504796549] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:17:37,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110739187] [2023-12-02 19:17:37,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:17:37,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:17:37,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:17:37,772 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:17:37,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 19:17:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:17:37,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 19:17:37,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:17:37,883 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 19:17:37,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:17:37,912 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 19:17:37,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110739187] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:17:37,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1060978447] [2023-12-02 19:17:37,914 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-12-02 19:17:37,914 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:17:37,915 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:17:37,915 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:17:37,915 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:17:38,595 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:17:47,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1060978447] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:17:47,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:17:47,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [3, 3, 3] total 16 [2023-12-02 19:17:47,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660364675] [2023-12-02 19:17:47,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:17:47,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 19:17:47,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:17:47,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 19:17:47,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=223, Unknown=2, NotChecked=0, Total=272 [2023-12-02 19:17:47,910 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:17:50,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:17:58,678 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 19:18:04,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:18:04,847 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2023-12-02 19:18:04,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 19:18:04,847 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-02 19:18:04,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:18:04,848 INFO L225 Difference]: With dead ends: 96 [2023-12-02 19:18:04,848 INFO L226 Difference]: Without dead ends: 96 [2023-12-02 19:18:04,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=58, Invalid=280, Unknown=4, NotChecked=0, Total=342 [2023-12-02 19:18:04,849 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 20 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 6 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2023-12-02 19:18:04,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 270 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 793 Invalid, 4 Unknown, 0 Unchecked, 11.8s Time] [2023-12-02 19:18:04,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-12-02 19:18:04,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2023-12-02 19:18:04,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 65 states have (on average 1.5538461538461539) internal successors, (101), 95 states have internal predecessors, (101), 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 19:18:04,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2023-12-02 19:18:04,851 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 19 [2023-12-02 19:18:04,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:18:04,851 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2023-12-02 19:18:04,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:18:04,851 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2023-12-02 19:18:04,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 19:18:04,852 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:18:04,852 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:18:04,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 19:18:05,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:18:05,052 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 19:18:05,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:18:05,053 INFO L85 PathProgramCache]: Analyzing trace with hash -496955114, now seen corresponding path program 1 times [2023-12-02 19:18:05,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:18:05,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22407683] [2023-12-02 19:18:05,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:18:05,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:18:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:18:05,123 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 19:18:05,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:18:05,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22407683] [2023-12-02 19:18:05,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22407683] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:18:05,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124713871] [2023-12-02 19:18:05,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:18:05,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:18:05,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:18:05,125 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:18:05,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 19:18:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:18:05,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 19:18:05,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:18:05,237 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 19:18:05,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:18:05,271 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 19:18:05,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124713871] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:18:05,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [819592088] [2023-12-02 19:18:05,274 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 19:18:05,274 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:18:05,274 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:18:05,275 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:18:05,275 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:18:05,864 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:18:16,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [819592088] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:18:16,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:18:16,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [3, 3, 3] total 17 [2023-12-02 19:18:16,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486299395] [2023-12-02 19:18:16,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:18:16,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 19:18:16,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:18:16,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 19:18:16,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=252, Unknown=2, NotChecked=0, Total=306 [2023-12-02 19:18:16,128 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 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 19:18:18,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:18:31,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:18:31,439 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2023-12-02 19:18:31,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 19:18:31,439 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 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 20 [2023-12-02 19:18:31,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:18:31,440 INFO L225 Difference]: With dead ends: 90 [2023-12-02 19:18:31,440 INFO L226 Difference]: Without dead ends: 90 [2023-12-02 19:18:31,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=63, Invalid=313, Unknown=4, NotChecked=0, Total=380 [2023-12-02 19:18:31,441 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 13 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2023-12-02 19:18:31,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 230 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 862 Invalid, 3 Unknown, 0 Unchecked, 10.5s Time] [2023-12-02 19:18:31,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-12-02 19:18:31,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2023-12-02 19:18:31,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 65 states have (on average 1.4615384615384615) internal successors, (95), 89 states have internal predecessors, (95), 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 19:18:31,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2023-12-02 19:18:31,443 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 20 [2023-12-02 19:18:31,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:18:31,444 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2023-12-02 19:18:31,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 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 19:18:31,444 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2023-12-02 19:18:31,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 19:18:31,444 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:18:31,444 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:18:31,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 19:18:31,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:18:31,645 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 19:18:31,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:18:31,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1621126442, now seen corresponding path program 1 times [2023-12-02 19:18:31,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:18:31,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789997428] [2023-12-02 19:18:31,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:18:31,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:18:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:18:31,715 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 19:18:31,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:18:31,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789997428] [2023-12-02 19:18:31,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789997428] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:18:31,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336663260] [2023-12-02 19:18:31,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:18:31,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:18:31,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:18:31,717 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:18:31,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 19:18:31,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:18:31,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 19:18:31,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:18:31,840 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 19:18:31,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:18:31,864 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 19:18:31,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336663260] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:18:31,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1108326550] [2023-12-02 19:18:31,867 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 19:18:31,867 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:18:31,867 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:18:31,867 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:18:31,867 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:18:32,463 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:18:42,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1108326550] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:18:42,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:18:42,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [3, 3, 3] total 17 [2023-12-02 19:18:42,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033147853] [2023-12-02 19:18:42,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:18:42,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 19:18:42,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:18:42,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 19:18:42,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=252, Unknown=2, NotChecked=0, Total=306 [2023-12-02 19:18:42,680 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 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 19:18:54,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:18:54,739 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2023-12-02 19:18:54,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 19:18:54,739 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 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 20 [2023-12-02 19:18:54,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:18:54,740 INFO L225 Difference]: With dead ends: 84 [2023-12-02 19:18:54,740 INFO L226 Difference]: Without dead ends: 84 [2023-12-02 19:18:54,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=63, Invalid=313, Unknown=4, NotChecked=0, Total=380 [2023-12-02 19:18:54,741 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 19 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2023-12-02 19:18:54,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 178 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 527 Invalid, 2 Unknown, 0 Unchecked, 6.8s Time] [2023-12-02 19:18:54,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-12-02 19:18:54,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-12-02 19:18:54,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 65 states have (on average 1.3692307692307693) internal successors, (89), 83 states have internal predecessors, (89), 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 19:18:54,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2023-12-02 19:18:54,745 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 20 [2023-12-02 19:18:54,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:18:54,746 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2023-12-02 19:18:54,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 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 19:18:54,746 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2023-12-02 19:18:54,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 19:18:54,747 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:18:54,747 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:18:54,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-02 19:18:54,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 19:18:54,948 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 19:18:54,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:18:54,948 INFO L85 PathProgramCache]: Analyzing trace with hash 491482337, now seen corresponding path program 1 times [2023-12-02 19:18:54,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:18:54,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958324058] [2023-12-02 19:18:54,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:18:54,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:18:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:18:55,013 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 19:18:55,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:18:55,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958324058] [2023-12-02 19:18:55,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958324058] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:18:55,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150322107] [2023-12-02 19:18:55,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:18:55,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:18:55,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:18:55,015 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:18:55,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 19:18:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:18:55,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 19:18:55,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:18:55,149 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 19:18:55,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:18:55,178 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 19:18:55,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150322107] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:18:55,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [665505037] [2023-12-02 19:18:55,181 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-12-02 19:18:55,181 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:18:55,182 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:18:55,182 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:18:55,182 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:18:55,931 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:19:07,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [665505037] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:19:07,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:19:07,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [3, 3, 3] total 17 [2023-12-02 19:19:07,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348347078] [2023-12-02 19:19:07,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:19:07,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 19:19:07,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:19:07,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 19:19:07,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=255, Unknown=2, NotChecked=0, Total=306 [2023-12-02 19:19:07,475 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 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 19:19:10,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:19:17,942 WARN L539 Checker$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 19:19:24,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:19:24,855 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2023-12-02 19:19:24,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 19:19:24,856 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 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 22 [2023-12-02 19:19:24,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:19:24,856 INFO L225 Difference]: With dead ends: 81 [2023-12-02 19:19:24,856 INFO L226 Difference]: Without dead ends: 81 [2023-12-02 19:19:24,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=60, Invalid=316, Unknown=4, NotChecked=0, Total=380 [2023-12-02 19:19:24,857 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 21 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:19:24,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 188 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 633 Invalid, 3 Unknown, 0 Unchecked, 12.2s Time] [2023-12-02 19:19:24,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-12-02 19:19:24,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-12-02 19:19:24,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 65 states have (on average 1.323076923076923) internal successors, (86), 80 states have internal predecessors, (86), 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 19:19:24,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2023-12-02 19:19:24,860 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 22 [2023-12-02 19:19:24,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:19:24,860 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2023-12-02 19:19:24,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 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 19:19:24,860 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2023-12-02 19:19:24,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 19:19:24,861 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:19:24,861 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:19:24,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 19:19:25,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 19:19:25,062 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 19:19:25,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:19:25,062 INFO L85 PathProgramCache]: Analyzing trace with hash 478122067, now seen corresponding path program 1 times [2023-12-02 19:19:25,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:19:25,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717646468] [2023-12-02 19:19:25,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:19:25,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:19:25,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:19:25,136 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 19:19:25,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:19:25,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717646468] [2023-12-02 19:19:25,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717646468] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:19:25,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196763887] [2023-12-02 19:19:25,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:19:25,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:19:25,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:19:25,138 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:19:25,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 19:19:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:19:25,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 19:19:25,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:19:25,263 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 19:19:25,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:19:25,292 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 19:19:25,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196763887] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:19:25,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2065571055] [2023-12-02 19:19:25,295 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-12-02 19:19:25,295 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:19:25,295 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:19:25,296 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:19:25,296 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:19:25,948 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:19:38,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2065571055] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:19:38,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:19:38,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [3, 3, 3] total 17 [2023-12-02 19:19:38,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812535084] [2023-12-02 19:19:38,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:19:38,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 19:19:38,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:19:38,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 19:19:38,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=255, Unknown=2, NotChecked=0, Total=306 [2023-12-02 19:19:38,919 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 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 19:19:41,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:19:49,111 WARN L539 Checker$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 19:19:55,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:19:55,815 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2023-12-02 19:19:55,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 19:19:55,816 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 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 22 [2023-12-02 19:19:55,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:19:55,817 INFO L225 Difference]: With dead ends: 78 [2023-12-02 19:19:55,817 INFO L226 Difference]: Without dead ends: 78 [2023-12-02 19:19:55,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=60, Invalid=316, Unknown=4, NotChecked=0, Total=380 [2023-12-02 19:19:55,817 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 21 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 3 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2023-12-02 19:19:55,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 186 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 679 Invalid, 4 Unknown, 0 Unchecked, 11.4s Time] [2023-12-02 19:19:55,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-12-02 19:19:55,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2023-12-02 19:19:55,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 77 states have internal predecessors, (83), 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 19:19:55,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2023-12-02 19:19:55,820 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 22 [2023-12-02 19:19:55,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:19:55,820 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2023-12-02 19:19:55,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 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 19:19:55,820 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2023-12-02 19:19:55,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 19:19:55,821 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:19:55,821 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:19:55,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 19:19:56,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 19:19:56,022 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 19:19:56,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:19:56,022 INFO L85 PathProgramCache]: Analyzing trace with hash -37330217, now seen corresponding path program 1 times [2023-12-02 19:19:56,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:19:56,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712066823] [2023-12-02 19:19:56,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:19:56,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:19:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:19:56,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:19:56,090 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:19:56,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712066823] [2023-12-02 19:19:56,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712066823] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:19:56,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:19:56,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 19:19:56,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001771862] [2023-12-02 19:19:56,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:19:56,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:19:56,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:19:56,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:19:56,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:19:56,092 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 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 19:19:56,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:19:56,170 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2023-12-02 19:19:56,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 19:19:56,171 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 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 23 [2023-12-02 19:19:56,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:19:56,171 INFO L225 Difference]: With dead ends: 79 [2023-12-02 19:19:56,172 INFO L226 Difference]: Without dead ends: 79 [2023-12-02 19:19:56,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:19:56,172 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 59 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:19:56,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 200 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:19:56,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-12-02 19:19:56,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2023-12-02 19:19:56,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 75 states have internal predecessors, (81), 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 19:19:56,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2023-12-02 19:19:56,175 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 23 [2023-12-02 19:19:56,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:19:56,175 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2023-12-02 19:19:56,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 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 19:19:56,176 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2023-12-02 19:19:56,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 19:19:56,176 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:19:56,177 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:19:56,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-02 19:19:56,177 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr52ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 19:19:56,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:19:56,177 INFO L85 PathProgramCache]: Analyzing trace with hash -50690487, now seen corresponding path program 1 times [2023-12-02 19:19:56,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:19:56,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173122071] [2023-12-02 19:19:56,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:19:56,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:19:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:19:56,248 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 19:19:56,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:19:56,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173122071] [2023-12-02 19:19:56,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173122071] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:19:56,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019687127] [2023-12-02 19:19:56,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:19:56,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:19:56,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:19:56,250 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:19:56,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 19:19:56,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:19:56,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 19:19:56,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:19:56,389 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 19:19:56,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:19:56,417 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 19:19:56,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019687127] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:19:56,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [946994653] [2023-12-02 19:19:56,420 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 19:19:56,420 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:19:56,420 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:19:56,420 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:19:56,421 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:19:57,081 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:20:09,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [946994653] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:20:09,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:20:09,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [3, 3, 3] total 18 [2023-12-02 19:20:09,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064096775] [2023-12-02 19:20:09,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:20:09,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 19:20:09,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:20:09,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 19:20:09,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=286, Unknown=2, NotChecked=0, Total=342 [2023-12-02 19:20:09,249 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 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 19:20:11,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:20:13,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:20:25,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:20:25,724 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2023-12-02 19:20:25,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 19:20:25,725 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 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 23 [2023-12-02 19:20:25,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:20:25,725 INFO L225 Difference]: With dead ends: 73 [2023-12-02 19:20:25,725 INFO L226 Difference]: Without dead ends: 73 [2023-12-02 19:20:25,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=65, Invalid=351, Unknown=4, NotChecked=0, Total=420 [2023-12-02 19:20:25,726 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2023-12-02 19:20:25,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 149 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 613 Invalid, 3 Unknown, 0 Unchecked, 11.5s Time] [2023-12-02 19:20:25,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-12-02 19:20:25,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-12-02 19:20:25,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 65 states have (on average 1.2) internal successors, (78), 72 states have internal predecessors, (78), 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 19:20:25,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2023-12-02 19:20:25,729 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 23 [2023-12-02 19:20:25,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:20:25,729 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2023-12-02 19:20:25,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 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 19:20:25,729 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2023-12-02 19:20:25,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 19:20:25,730 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:20:25,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:20:25,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 19:20:25,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:20:25,931 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 19:20:25,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:20:25,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1916213539, now seen corresponding path program 1 times [2023-12-02 19:20:25,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:20:25,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503614179] [2023-12-02 19:20:25,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:20:25,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:20:25,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:20:26,002 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 19:20:26,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:20:26,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503614179] [2023-12-02 19:20:26,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503614179] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:20:26,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915862761] [2023-12-02 19:20:26,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:20:26,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:20:26,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:20:26,005 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:20:26,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 19:20:26,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:20:26,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 19:20:26,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:20:26,155 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 19:20:26,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:20:26,184 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 19:20:26,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915862761] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:20:26,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [57778874] [2023-12-02 19:20:26,187 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 19:20:26,187 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:20:26,187 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:20:26,188 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:20:26,188 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:20:26,898 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:20:39,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [57778874] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:20:39,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:20:39,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [3, 3, 3] total 18 [2023-12-02 19:20:39,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899917603] [2023-12-02 19:20:39,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:20:39,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 19:20:39,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:20:39,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 19:20:39,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=286, Unknown=2, NotChecked=0, Total=342 [2023-12-02 19:20:39,623 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 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 19:20:48,675 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 19:20:55,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:20:55,202 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2023-12-02 19:20:55,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 19:20:55,203 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 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 23 [2023-12-02 19:20:55,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:20:55,204 INFO L225 Difference]: With dead ends: 70 [2023-12-02 19:20:55,204 INFO L226 Difference]: Without dead ends: 70 [2023-12-02 19:20:55,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=65, Invalid=351, Unknown=4, NotChecked=0, Total=420 [2023-12-02 19:20:55,205 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 25 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2023-12-02 19:20:55,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 125 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 537 Invalid, 3 Unknown, 0 Unchecked, 10.5s Time] [2023-12-02 19:20:55,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-12-02 19:20:55,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-12-02 19:20:55,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 69 states have internal predecessors, (75), 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 19:20:55,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2023-12-02 19:20:55,208 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 23 [2023-12-02 19:20:55,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:20:55,208 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2023-12-02 19:20:55,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 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 19:20:55,209 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2023-12-02 19:20:55,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 19:20:55,209 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:20:55,209 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:20:55,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 19:20:55,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:20:55,410 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 19:20:55,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:20:55,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1157236518, now seen corresponding path program 1 times [2023-12-02 19:20:55,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:20:55,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791837559] [2023-12-02 19:20:55,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:20:55,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:20:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:20:55,475 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 19:20:55,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:20:55,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791837559] [2023-12-02 19:20:55,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791837559] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:20:55,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228371056] [2023-12-02 19:20:55,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:20:55,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:20:55,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:20:55,477 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:20:55,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 19:20:55,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:20:55,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 19:20:55,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:20:55,616 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 19:20:55,616 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:20:55,644 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 19:20:55,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228371056] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:20:55,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1707831117] [2023-12-02 19:20:55,646 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 19:20:55,646 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:20:55,647 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:20:55,647 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:20:55,647 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:20:56,420 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:21:10,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1707831117] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:21:10,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:21:10,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [3, 3, 3] total 18 [2023-12-02 19:21:10,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393555030] [2023-12-02 19:21:10,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:21:10,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 19:21:10,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:21:10,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 19:21:10,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=286, Unknown=2, NotChecked=0, Total=342 [2023-12-02 19:21:10,025 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 17 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:21:12,701 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 19:21:14,900 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 19:21:28,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:21:28,950 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2023-12-02 19:21:28,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 19:21:28,951 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-12-02 19:21:28,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:21:28,951 INFO L225 Difference]: With dead ends: 68 [2023-12-02 19:21:28,951 INFO L226 Difference]: Without dead ends: 68 [2023-12-02 19:21:28,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=65, Invalid=351, Unknown=4, NotChecked=0, Total=420 [2023-12-02 19:21:28,952 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 17 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:21:28,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 142 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 633 Invalid, 4 Unknown, 0 Unchecked, 13.1s Time] [2023-12-02 19:21:28,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-02 19:21:28,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-12-02 19:21:28,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 65 states have (on average 1.123076923076923) internal successors, (73), 67 states have internal predecessors, (73), 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 19:21:28,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2023-12-02 19:21:28,954 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 24 [2023-12-02 19:21:28,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:21:28,954 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2023-12-02 19:21:28,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:21:28,955 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2023-12-02 19:21:28,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 19:21:28,955 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:21:28,955 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:21:28,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 19:21:29,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:21:29,156 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 19:21:29,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:21:29,156 INFO L85 PathProgramCache]: Analyzing trace with hash -312753894, now seen corresponding path program 1 times [2023-12-02 19:21:29,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:21:29,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916267016] [2023-12-02 19:21:29,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:21:29,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:21:29,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:21:29,205 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 19:21:29,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:21:29,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916267016] [2023-12-02 19:21:29,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916267016] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:21:29,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822509861] [2023-12-02 19:21:29,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:21:29,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:21:29,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:21:29,206 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:21:29,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 19:21:29,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:21:29,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 19:21:29,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:21:29,343 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 19:21:29,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:21:29,368 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 19:21:29,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822509861] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:21:29,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [61464661] [2023-12-02 19:21:29,370 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 19:21:29,370 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:21:29,370 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:21:29,370 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:21:29,370 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:21:30,119 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:21:42,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [61464661] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:21:42,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:21:42,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [3, 3, 3] total 18 [2023-12-02 19:21:42,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392404197] [2023-12-02 19:21:42,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:21:42,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 19:21:42,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:21:42,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 19:21:42,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=286, Unknown=2, NotChecked=0, Total=342 [2023-12-02 19:21:42,682 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 17 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:21:52,044 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 19:22:00,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:22:00,790 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2023-12-02 19:22:00,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 19:22:00,790 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-12-02 19:22:00,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:22:00,791 INFO L225 Difference]: With dead ends: 66 [2023-12-02 19:22:00,791 INFO L226 Difference]: Without dead ends: 66 [2023-12-02 19:22:00,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=65, Invalid=351, Unknown=4, NotChecked=0, Total=420 [2023-12-02 19:22:00,791 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 12 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2023-12-02 19:22:00,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 156 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 772 Invalid, 3 Unknown, 0 Unchecked, 12.9s Time] [2023-12-02 19:22:00,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-12-02 19:22:00,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-12-02 19:22:00,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 65 states have internal predecessors, (71), 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 19:22:00,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2023-12-02 19:22:00,793 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 24 [2023-12-02 19:22:00,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:22:00,793 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2023-12-02 19:22:00,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:22:00,793 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2023-12-02 19:22:00,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 19:22:00,794 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:22:00,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:22:00,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 19:22:00,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:22:00,994 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 19:22:00,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:22:00,995 INFO L85 PathProgramCache]: Analyzing trace with hash 2119513798, now seen corresponding path program 1 times [2023-12-02 19:22:00,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:22:00,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980869527] [2023-12-02 19:22:00,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:22:00,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:22:01,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:22:01,058 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 19:22:01,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:22:01,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980869527] [2023-12-02 19:22:01,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980869527] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:22:01,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828386267] [2023-12-02 19:22:01,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:22:01,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:22:01,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:22:01,059 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:22:01,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 19:22:01,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:22:01,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 19:22:01,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:22:01,215 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 19:22:01,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:22:01,249 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 19:22:01,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828386267] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:22:01,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [527534456] [2023-12-02 19:22:01,251 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-12-02 19:22:01,251 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:22:01,252 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:22:01,252 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:22:01,252 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:22:02,070 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:22:16,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [527534456] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:22:16,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:22:16,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [3, 3, 3] total 19 [2023-12-02 19:22:16,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641406479] [2023-12-02 19:22:16,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:22:16,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 19:22:16,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:22:16,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 19:22:16,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=325, Unknown=2, NotChecked=0, Total=380 [2023-12-02 19:22:16,442 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 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 19:22:19,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:22:21,225 WARN L539 Checker$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 19:22:28,653 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 19:22:37,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:22:37,060 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2023-12-02 19:22:37,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 19:22:37,061 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 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 26 [2023-12-02 19:22:37,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:22:37,061 INFO L225 Difference]: With dead ends: 68 [2023-12-02 19:22:37,061 INFO L226 Difference]: Without dead ends: 60 [2023-12-02 19:22:37,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 52 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=64, Invalid=394, Unknown=4, NotChecked=0, Total=462 [2023-12-02 19:22:37,062 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 1 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:22:37,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 175 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 754 Invalid, 5 Unknown, 0 Unchecked, 15.2s Time] [2023-12-02 19:22:37,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-02 19:22:37,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-12-02 19:22:37,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 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 19:22:37,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2023-12-02 19:22:37,064 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 26 [2023-12-02 19:22:37,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:22:37,064 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2023-12-02 19:22:37,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 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 19:22:37,064 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2023-12-02 19:22:37,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 19:22:37,065 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:22:37,065 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:22:37,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 19:22:37,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:22:37,266 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 19:22:37,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:22:37,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1224753288, now seen corresponding path program 1 times [2023-12-02 19:22:37,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:22:37,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955847685] [2023-12-02 19:22:37,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:22:37,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:22:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:22:37,329 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 19:22:37,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:22:37,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955847685] [2023-12-02 19:22:37,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955847685] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:22:37,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312195288] [2023-12-02 19:22:37,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:22:37,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:22:37,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:22:37,331 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:22:37,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 19:22:37,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:22:37,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 19:22:37,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:22:37,484 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 19:22:37,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:22:37,518 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 19:22:37,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312195288] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:22:37,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [246261133] [2023-12-02 19:22:37,520 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-12-02 19:22:37,520 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:22:37,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:22:37,521 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:22:37,521 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:22:38,361 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:22:52,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [246261133] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:22:52,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:22:52,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [3, 3, 3] total 19 [2023-12-02 19:22:52,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289935432] [2023-12-02 19:22:52,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:22:52,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 19:22:52,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:22:52,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 19:22:52,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=325, Unknown=2, NotChecked=0, Total=380 [2023-12-02 19:22:52,468 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 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 19:22:55,904 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 19:23:03,089 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 19:23:10,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:23:10,465 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2023-12-02 19:23:10,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 19:23:10,466 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 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 26 [2023-12-02 19:23:10,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:23:10,467 INFO L225 Difference]: With dead ends: 62 [2023-12-02 19:23:10,467 INFO L226 Difference]: Without dead ends: 50 [2023-12-02 19:23:10,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 52 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=64, Invalid=394, Unknown=4, NotChecked=0, Total=462 [2023-12-02 19:23:10,468 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:23:10,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 185 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 659 Invalid, 4 Unknown, 0 Unchecked, 13.0s Time] [2023-12-02 19:23:10,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-12-02 19:23:10,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-12-02 19:23:10,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 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 19:23:10,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2023-12-02 19:23:10,470 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 26 [2023-12-02 19:23:10,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:23:10,470 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2023-12-02 19:23:10,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 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 19:23:10,471 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2023-12-02 19:23:10,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 19:23:10,471 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:23:10,471 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:23:10,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 19:23:10,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-02 19:23:10,672 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 19:23:10,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:23:10,673 INFO L85 PathProgramCache]: Analyzing trace with hash 469586844, now seen corresponding path program 1 times [2023-12-02 19:23:10,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:23:10,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125617874] [2023-12-02 19:23:10,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:23:10,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:23:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:23:10,731 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 19:23:10,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:23:10,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125617874] [2023-12-02 19:23:10,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125617874] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:23:10,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316542346] [2023-12-02 19:23:10,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:23:10,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:23:10,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:23:10,733 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:23:10,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 19:23:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:23:10,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 19:23:10,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:23:10,881 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 19:23:10,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:23:10,905 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 19:23:10,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316542346] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:23:10,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1872733678] [2023-12-02 19:23:10,907 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-12-02 19:23:10,907 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:23:10,907 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:23:10,907 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:23:10,907 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:23:11,777 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:23:26,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1872733678] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:23:26,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:23:26,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [3, 3, 3] total 20 [2023-12-02 19:23:26,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875480519] [2023-12-02 19:23:26,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:23:26,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 19:23:26,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:23:26,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 19:23:26,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=360, Unknown=2, NotChecked=0, Total=420 [2023-12-02 19:23:26,418 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 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 19:23:35,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:23:43,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:23:43,189 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2023-12-02 19:23:43,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 19:23:43,190 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 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 27 [2023-12-02 19:23:43,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:23:43,190 INFO L225 Difference]: With dead ends: 52 [2023-12-02 19:23:43,190 INFO L226 Difference]: Without dead ends: 44 [2023-12-02 19:23:43,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 54 SyntacticMatches, 9 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=69, Invalid=433, Unknown=4, NotChecked=0, Total=506 [2023-12-02 19:23:43,191 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 10 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2023-12-02 19:23:43,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 90 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 606 Invalid, 3 Unknown, 0 Unchecked, 11.7s Time] [2023-12-02 19:23:43,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-02 19:23:43,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-12-02 19:23:43,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 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 19:23:43,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2023-12-02 19:23:43,193 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 27 [2023-12-02 19:23:43,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:23:43,193 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2023-12-02 19:23:43,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 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 19:23:43,193 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2023-12-02 19:23:43,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 19:23:43,193 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:23:43,193 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:23:43,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 19:23:43,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-02 19:23:43,394 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 19:23:43,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:23:43,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1420287054, now seen corresponding path program 1 times [2023-12-02 19:23:43,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:23:43,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514497519] [2023-12-02 19:23:43,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:23:43,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:23:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:23:43,450 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 19:23:43,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:23:43,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514497519] [2023-12-02 19:23:43,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514497519] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:23:43,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551985915] [2023-12-02 19:23:43,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:23:43,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:23:43,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:23:43,453 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:23:43,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 19:23:43,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:23:43,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 19:23:43,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:23:43,610 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 19:23:43,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:23:43,646 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 19:23:43,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551985915] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:23:43,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [913413144] [2023-12-02 19:23:43,648 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-12-02 19:23:43,648 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:23:43,648 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:23:43,648 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:23:43,648 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:23:44,435 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:23:59,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [913413144] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:23:59,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:23:59,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [3, 3, 3] total 20 [2023-12-02 19:23:59,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713719062] [2023-12-02 19:23:59,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:23:59,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 19:23:59,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:23:59,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 19:23:59,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=360, Unknown=2, NotChecked=0, Total=420 [2023-12-02 19:23:59,932 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 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 19:24:02,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:24:10,860 WARN L539 Checker$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 19:24:17,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:24:17,776 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2023-12-02 19:24:17,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 19:24:17,776 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 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 27 [2023-12-02 19:24:17,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:24:17,777 INFO L225 Difference]: With dead ends: 46 [2023-12-02 19:24:17,777 INFO L226 Difference]: Without dead ends: 34 [2023-12-02 19:24:17,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 54 SyntacticMatches, 9 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=69, Invalid=433, Unknown=4, NotChecked=0, Total=506 [2023-12-02 19:24:17,778 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2023-12-02 19:24:17,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 87 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 592 Invalid, 4 Unknown, 0 Unchecked, 12.6s Time] [2023-12-02 19:24:17,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-12-02 19:24:17,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-12-02 19:24:17,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 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 19:24:17,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2023-12-02 19:24:17,779 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 27 [2023-12-02 19:24:17,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:24:17,780 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2023-12-02 19:24:17,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 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 19:24:17,780 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2023-12-02 19:24:17,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 19:24:17,780 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:24:17,780 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:24:17,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 19:24:17,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-02 19:24:17,981 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 19:24:17,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:24:17,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1467018058, now seen corresponding path program 1 times [2023-12-02 19:24:17,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:24:17,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970300538] [2023-12-02 19:24:17,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:24:17,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:24:17,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:24:18,032 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 19:24:18,032 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:24:18,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970300538] [2023-12-02 19:24:18,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970300538] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:24:18,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173397286] [2023-12-02 19:24:18,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:24:18,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:24:18,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:24:18,035 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:24:18,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 19:24:18,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:24:18,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 19:24:18,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:24:18,199 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 19:24:18,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:24:18,225 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 19:24:18,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173397286] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:24:18,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [37602074] [2023-12-02 19:24:18,227 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-12-02 19:24:18,227 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:24:18,228 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:24:18,228 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:24:18,228 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:24:19,106 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:24:35,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [37602074] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:24:35,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:24:35,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [3, 3, 3] total 20 [2023-12-02 19:24:35,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315812310] [2023-12-02 19:24:35,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:24:35,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 19:24:35,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:24:35,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 19:24:35,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=359, Unknown=3, NotChecked=0, Total=420 [2023-12-02 19:24:35,510 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 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 19:24:38,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:24:40,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:24:47,624 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 19:24:54,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:24:54,271 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2023-12-02 19:24:54,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 19:24:54,272 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 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 27 [2023-12-02 19:24:54,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:24:54,273 INFO L225 Difference]: With dead ends: 36 [2023-12-02 19:24:54,273 INFO L226 Difference]: Without dead ends: 28 [2023-12-02 19:24:54,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 54 SyntacticMatches, 9 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=69, Invalid=432, Unknown=5, NotChecked=0, Total=506 [2023-12-02 19:24:54,273 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 1 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2023-12-02 19:24:54,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 21 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 428 Invalid, 5 Unknown, 0 Unchecked, 13.5s Time] [2023-12-02 19:24:54,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-02 19:24:54,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-12-02 19:24:54,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 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 19:24:54,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2023-12-02 19:24:54,275 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 27 [2023-12-02 19:24:54,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:24:54,275 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2023-12-02 19:24:54,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 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 19:24:54,275 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2023-12-02 19:24:54,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 19:24:54,275 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:24:54,276 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:24:54,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 19:24:54,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-02 19:24:54,476 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-12-02 19:24:54,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:24:54,477 INFO L85 PathProgramCache]: Analyzing trace with hash -516317848, now seen corresponding path program 1 times [2023-12-02 19:24:54,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:24:54,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959539551] [2023-12-02 19:24:54,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:24:54,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:24:54,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:24:54,533 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 19:24:54,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:24:54,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959539551] [2023-12-02 19:24:54,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959539551] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:24:54,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453588180] [2023-12-02 19:24:54,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:24:54,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:24:54,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:24:54,535 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:24:54,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 19:24:54,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:24:54,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 19:24:54,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:24:54,707 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 19:24:54,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:24:54,741 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 19:24:54,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453588180] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:24:54,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [717346817] [2023-12-02 19:24:54,744 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-12-02 19:24:54,744 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:24:54,745 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:24:54,745 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:24:54,745 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:24:55,660 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:25:13,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [717346817] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:25:13,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:25:13,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [3, 3, 3] total 20 [2023-12-02 19:25:13,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313736159] [2023-12-02 19:25:13,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:25:13,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 19:25:13,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:25:13,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 19:25:13,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=359, Unknown=4, NotChecked=0, Total=420 [2023-12-02 19:25:13,881 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 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 19:25:16,697 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 19:25:18,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:25:26,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:25:30,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:25:30,969 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2023-12-02 19:25:30,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 19:25:30,970 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 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 27 [2023-12-02 19:25:30,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:25:30,970 INFO L225 Difference]: With dead ends: 27 [2023-12-02 19:25:30,970 INFO L226 Difference]: Without dead ends: 0 [2023-12-02 19:25:30,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=68, Invalid=432, Unknown=6, NotChecked=0, Total=506 [2023-12-02 19:25:30,971 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 2 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2023-12-02 19:25:30,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 8 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 310 Invalid, 5 Unknown, 0 Unchecked, 11.8s Time] [2023-12-02 19:25:30,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-02 19:25:30,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-02 19:25:30,971 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 19:25:30,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-02 19:25:30,971 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2023-12-02 19:25:30,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:25:30,971 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-02 19:25:30,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 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 19:25:30,972 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-02 19:25:30,972 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-02 19:25:30,973 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 62 remaining) [2023-12-02 19:25:30,974 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 62 remaining) [2023-12-02 19:25:30,974 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 62 remaining) [2023-12-02 19:25:30,974 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 62 remaining) [2023-12-02 19:25:30,974 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 62 remaining) [2023-12-02 19:25:30,974 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 62 remaining) [2023-12-02 19:25:30,974 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 62 remaining) [2023-12-02 19:25:30,975 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 62 remaining) [2023-12-02 19:25:30,975 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 62 remaining) [2023-12-02 19:25:30,975 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 62 remaining) [2023-12-02 19:25:30,975 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 62 remaining) [2023-12-02 19:25:30,975 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 62 remaining) [2023-12-02 19:25:30,975 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 62 remaining) [2023-12-02 19:25:30,975 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 62 remaining) [2023-12-02 19:25:30,975 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 62 remaining) [2023-12-02 19:25:30,976 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 62 remaining) [2023-12-02 19:25:30,976 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE (45 of 62 remaining) [2023-12-02 19:25:30,976 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE (44 of 62 remaining) [2023-12-02 19:25:30,976 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE (43 of 62 remaining) [2023-12-02 19:25:30,976 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE (42 of 62 remaining) [2023-12-02 19:25:30,976 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE (41 of 62 remaining) [2023-12-02 19:25:30,976 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE (40 of 62 remaining) [2023-12-02 19:25:30,976 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE (39 of 62 remaining) [2023-12-02 19:25:30,977 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE (38 of 62 remaining) [2023-12-02 19:25:30,977 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE (37 of 62 remaining) [2023-12-02 19:25:30,977 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE (36 of 62 remaining) [2023-12-02 19:25:30,977 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE (35 of 62 remaining) [2023-12-02 19:25:30,977 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE (34 of 62 remaining) [2023-12-02 19:25:30,977 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE (33 of 62 remaining) [2023-12-02 19:25:30,977 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE (32 of 62 remaining) [2023-12-02 19:25:30,977 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE (31 of 62 remaining) [2023-12-02 19:25:30,977 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE (30 of 62 remaining) [2023-12-02 19:25:30,978 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE (29 of 62 remaining) [2023-12-02 19:25:30,978 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE (28 of 62 remaining) [2023-12-02 19:25:30,978 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE (27 of 62 remaining) [2023-12-02 19:25:30,978 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE (26 of 62 remaining) [2023-12-02 19:25:30,978 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE (25 of 62 remaining) [2023-12-02 19:25:30,978 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE (24 of 62 remaining) [2023-12-02 19:25:30,978 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE (23 of 62 remaining) [2023-12-02 19:25:30,978 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE (22 of 62 remaining) [2023-12-02 19:25:30,979 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE (21 of 62 remaining) [2023-12-02 19:25:30,979 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE (20 of 62 remaining) [2023-12-02 19:25:30,979 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE (19 of 62 remaining) [2023-12-02 19:25:30,979 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE (18 of 62 remaining) [2023-12-02 19:25:30,979 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE (17 of 62 remaining) [2023-12-02 19:25:30,979 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr45ASSERT_VIOLATIONMEMORY_FREE (16 of 62 remaining) [2023-12-02 19:25:30,979 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE (15 of 62 remaining) [2023-12-02 19:25:30,979 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE (14 of 62 remaining) [2023-12-02 19:25:30,979 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE (13 of 62 remaining) [2023-12-02 19:25:30,980 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_FREE (12 of 62 remaining) [2023-12-02 19:25:30,980 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr50ASSERT_VIOLATIONMEMORY_FREE (11 of 62 remaining) [2023-12-02 19:25:30,980 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr51ASSERT_VIOLATIONMEMORY_FREE (10 of 62 remaining) [2023-12-02 19:25:30,980 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr52ASSERT_VIOLATIONMEMORY_FREE (9 of 62 remaining) [2023-12-02 19:25:30,980 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE (8 of 62 remaining) [2023-12-02 19:25:30,980 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE (7 of 62 remaining) [2023-12-02 19:25:30,980 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE (6 of 62 remaining) [2023-12-02 19:25:30,980 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE (5 of 62 remaining) [2023-12-02 19:25:30,981 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE (4 of 62 remaining) [2023-12-02 19:25:30,981 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE (3 of 62 remaining) [2023-12-02 19:25:30,981 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE (2 of 62 remaining) [2023-12-02 19:25:30,981 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE (1 of 62 remaining) [2023-12-02 19:25:30,981 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK (0 of 62 remaining) [2023-12-02 19:25:30,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-02 19:25:31,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-02 19:25:31,185 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:25:31,187 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 19:25:31,193 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 07:25:31 BoogieIcfgContainer [2023-12-02 19:25:31,193 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 19:25:31,194 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 19:25:31,194 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 19:25:31,194 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 19:25:31,195 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:16:41" (3/4) ... [2023-12-02 19:25:31,197 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-12-02 19:25:31,201 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure myexit [2023-12-02 19:25:31,209 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2023-12-02 19:25:31,210 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2023-12-02 19:25:31,211 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-12-02 19:25:31,211 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-12-02 19:25:31,308 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 19:25:31,308 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/witness.yml [2023-12-02 19:25:31,308 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 19:25:31,309 INFO L158 Benchmark]: Toolchain (without parser) took 530388.83ms. Allocated memory was 184.5MB in the beginning and 222.3MB in the end (delta: 37.7MB). Free memory was 151.6MB in the beginning and 126.2MB in the end (delta: 25.5MB). Peak memory consumption was 65.4MB. Max. memory is 16.1GB. [2023-12-02 19:25:31,309 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 104.9MB. Free memory is still 51.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 19:25:31,309 INFO L158 Benchmark]: CACSL2BoogieTranslator took 421.62ms. Allocated memory is still 184.5MB. Free memory was 151.6MB in the beginning and 134.1MB in the end (delta: 17.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-12-02 19:25:31,310 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.12ms. Allocated memory is still 184.5MB. Free memory was 134.1MB in the beginning and 132.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 19:25:31,310 INFO L158 Benchmark]: Boogie Preprocessor took 32.54ms. Allocated memory is still 184.5MB. Free memory was 132.0MB in the beginning and 129.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 19:25:31,310 INFO L158 Benchmark]: RCFGBuilder took 510.18ms. Allocated memory is still 184.5MB. Free memory was 129.9MB in the beginning and 105.7MB in the end (delta: 24.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2023-12-02 19:25:31,311 INFO L158 Benchmark]: TraceAbstraction took 529256.33ms. Allocated memory was 184.5MB in the beginning and 222.3MB in the end (delta: 37.7MB). Free memory was 104.7MB in the beginning and 133.2MB in the end (delta: -28.4MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. [2023-12-02 19:25:31,311 INFO L158 Benchmark]: Witness Printer took 114.25ms. Allocated memory is still 222.3MB. Free memory was 132.1MB in the beginning and 126.2MB in the end (delta: 6.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-12-02 19:25:31,312 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 104.9MB. Free memory is still 51.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 421.62ms. Allocated memory is still 184.5MB. Free memory was 151.6MB in the beginning and 134.1MB in the end (delta: 17.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.12ms. Allocated memory is still 184.5MB. Free memory was 134.1MB in the beginning and 132.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.54ms. Allocated memory is still 184.5MB. Free memory was 132.0MB in the beginning and 129.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 510.18ms. Allocated memory is still 184.5MB. Free memory was 129.9MB in the beginning and 105.7MB in the end (delta: 24.2MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 529256.33ms. Allocated memory was 184.5MB in the beginning and 222.3MB in the end (delta: 37.7MB). Free memory was 104.7MB in the beginning and 133.2MB in the end (delta: -28.4MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. * Witness Printer took 114.25ms. Allocated memory is still 222.3MB. Free memory was 132.1MB in the beginning and 126.2MB in the end (delta: 6.0MB). Peak memory consumption was 6.3MB. 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: -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: -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: -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: 589]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 589]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 589]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 591]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 591]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 591]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 592]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 592]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 592]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 594]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 594]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 594]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 595]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 595]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 595]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 598]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 598]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 598]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 600]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 600]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 600]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 601]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 601]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 601]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 603]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 603]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 603]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 604]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 604]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 604]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 607]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 607]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 607]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 609]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 609]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 609]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 610]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 610]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 610]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 612]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 612]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 612]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 613]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 613]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 613]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 617]: 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 2 procedures, 132 locations, 62 error locations. Started 1 CEGAR loops. OverallTime: 529.2s, OverallIterations: 28, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 289.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 63 mSolverCounterUnknown, 420 SdHoareTripleChecker+Valid, 196.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 420 mSDsluCounter, 5632 SdHoareTripleChecker+Invalid, 191.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3766 mSDsCounter, 77 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11668 IncrementalHoareTripleChecker+Invalid, 11808 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 77 mSolverCounterUnsat, 1866 mSDtfsCounter, 11668 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1278 GetRequests, 797 SyntacticMatches, 128 SemanticMatches, 353 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2065 ImplicationChecksByTransitivity, 309.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=131occurred in iteration=0, InterpolantAutomatonStates: 348, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 28 MinimizatonAttempts, 17 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 881 NumberOfCodeBlocks, 881 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 1213 ConstructedInterpolants, 0 QuantifiedInterpolants, 2303 SizeOfPredicates, 36 NumberOfNonLiveVariables, 3153 ConjunctsInSsa, 90 ConjunctsInUnsatCore, 64 InterpolantComputations, 10 PerfectInterpolantSequences, 3/57 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: OVERALL_TIME: 13.3s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 18, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 396, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 558, TOOLS_POST_TIME: 8.7s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 558, TOOLS_QUANTIFIERELIM_TIME: 8.4s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 1062, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 54, DOMAIN_JOIN_TIME: 0.6s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 18, DOMAIN_WIDEN_TIME: 0.2s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 36, DOMAIN_ISSUBSETEQ_TIME: 0.1s, DOMAIN_ISBOTTOM_APPLICATIONS: 396, DOMAIN_ISBOTTOM_TIME: 3.4s, LOOP_SUMMARIZER_APPLICATIONS: 18, LOOP_SUMMARIZER_CACHE_MISSES: 18, LOOP_SUMMARIZER_OVERALL_TIME: 2.5s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 2.5s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 36, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.1s, DAG_COMPRESSION_PROCESSED_NODES: 6634, DAG_COMPRESSION_RETAINED_NODES: 990, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 62 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-12-02 19:25:31,531 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2023-12-02 19:25:31,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bcc0870-3089-4eab-974c-047416c31b98/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE