./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-memory-alloca/cstrpbrk-alloca-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-memory-alloca/cstrpbrk-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 5142bd1a70b277e6c0e9690abed85caa4ceacf811cc7ce059063d386607411a7 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 04:45:00,918 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 04:45:01,008 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2024-11-09 04:45:01,015 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 04:45:01,016 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 04:45:01,048 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 04:45:01,050 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 04:45:01,051 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 04:45:01,051 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 04:45:01,053 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 04:45:01,053 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 04:45:01,054 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 04:45:01,055 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 04:45:01,055 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 04:45:01,057 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 04:45:01,057 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 04:45:01,057 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 04:45:01,061 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 04:45:01,061 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 04:45:01,061 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 04:45:01,062 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 04:45:01,062 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 04:45:01,063 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 04:45:01,063 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 04:45:01,063 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 04:45:01,064 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 04:45:01,064 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 04:45:01,064 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 04:45:01,065 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 04:45:01,065 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 04:45:01,065 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 04:45:01,066 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 04:45:01,066 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 04:45:01,067 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 04:45:01,067 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 04:45:01,067 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 04:45:01,068 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 04:45:01,068 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 04:45:01,069 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:45:01,069 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 04:45:01,069 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 04:45:01,070 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 04:45:01,070 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 04:45:01,070 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 04:45:01,071 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 04:45:01,072 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 04:45:01,072 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_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5142bd1a70b277e6c0e9690abed85caa4ceacf811cc7ce059063d386607411a7 [2024-11-09 04:45:01,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 04:45:01,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 04:45:01,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 04:45:01,390 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 04:45:01,391 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 04:45:01,393 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/termination-memory-alloca/cstrpbrk-alloca-1.i Unable to find full path for "g++" [2024-11-09 04:45:03,649 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 04:45:03,992 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 04:45:03,993 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/sv-benchmarks/c/termination-memory-alloca/cstrpbrk-alloca-1.i [2024-11-09 04:45:04,007 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/data/056a95b84/0496606dfb524f8fa640fe1dc3b5ed2e/FLAG2c10d64d5 [2024-11-09 04:45:04,283 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/data/056a95b84/0496606dfb524f8fa640fe1dc3b5ed2e [2024-11-09 04:45:04,286 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 04:45:04,289 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 04:45:04,291 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 04:45:04,291 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 04:45:04,297 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 04:45:04,298 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:45:04" (1/1) ... [2024-11-09 04:45:04,301 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@256dc45d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:45:04, skipping insertion in model container [2024-11-09 04:45:04,302 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:45:04" (1/1) ... [2024-11-09 04:45:04,349 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 04:45:04,712 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 04:45:04,713 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 04:45:04,716 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:45:04,728 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 04:45:04,781 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:45:04,811 INFO L204 MainTranslator]: Completed translation [2024-11-09 04:45:04,812 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:45:04 WrapperNode [2024-11-09 04:45:04,812 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 04:45:04,813 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 04:45:04,813 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 04:45:04,813 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 04:45:04,820 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:45:04" (1/1) ... [2024-11-09 04:45:04,832 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:45:04" (1/1) ... [2024-11-09 04:45:04,858 INFO L138 Inliner]: procedures = 111, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2024-11-09 04:45:04,859 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 04:45:04,860 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 04:45:04,860 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 04:45:04,860 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 04:45:04,870 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:45:04" (1/1) ... [2024-11-09 04:45:04,870 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:45:04" (1/1) ... [2024-11-09 04:45:04,875 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:45:04" (1/1) ... [2024-11-09 04:45:04,876 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:45:04" (1/1) ... [2024-11-09 04:45:04,884 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:45:04" (1/1) ... [2024-11-09 04:45:04,888 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:45:04" (1/1) ... [2024-11-09 04:45:04,889 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:45:04" (1/1) ... [2024-11-09 04:45:04,891 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:45:04" (1/1) ... [2024-11-09 04:45:04,893 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 04:45:04,894 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 04:45:04,894 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 04:45:04,895 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 04:45:04,896 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:45:04" (1/1) ... [2024-11-09 04:45:04,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:45:04,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:45:04,925 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 04:45:04,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 04:45:04,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 04:45:04,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 04:45:04,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 04:45:04,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 04:45:04,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 04:45:04,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 04:45:05,066 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 04:45:05,068 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 04:45:05,304 INFO L? ?]: Removed 56 outVars from TransFormulas that were not future-live. [2024-11-09 04:45:05,305 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 04:45:05,386 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 04:45:05,387 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-09 04:45:05,387 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:45:05 BoogieIcfgContainer [2024-11-09 04:45:05,387 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 04:45:05,404 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 04:45:05,404 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 04:45:05,410 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 04:45:05,410 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 04:45:04" (1/3) ... [2024-11-09 04:45:05,412 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56e2c29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:45:05, skipping insertion in model container [2024-11-09 04:45:05,412 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:45:04" (2/3) ... [2024-11-09 04:45:05,413 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56e2c29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:45:05, skipping insertion in model container [2024-11-09 04:45:05,413 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:45:05" (3/3) ... [2024-11-09 04:45:05,414 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrpbrk-alloca-1.i [2024-11-09 04:45:05,428 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 04:45:05,429 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2024-11-09 04:45:05,490 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 04:45:05,497 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@1b3ac3a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 04:45:05,497 INFO L334 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2024-11-09 04:45:05,500 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 15 states have (on average 2.4) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:05,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2024-11-09 04:45:05,505 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:45:05,506 INFO L215 NwaCegarLoop]: trace histogram [1, 1] [2024-11-09 04:45:05,506 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:45:05,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:45:05,511 INFO L85 PathProgramCache]: Analyzing trace with hash 3799, now seen corresponding path program 1 times [2024-11-09 04:45:05,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:45:05,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864797755] [2024-11-09 04:45:05,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:45:05,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:45:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:45:05,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:45:05,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:45:05,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864797755] [2024-11-09 04:45:05,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864797755] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:45:05,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:45:05,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 04:45:05,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577919370] [2024-11-09 04:45:05,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:45:05,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:45:05,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:45:05,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:45:05,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:45:05,977 INFO L87 Difference]: Start difference. First operand has 31 states, 15 states have (on average 2.4) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:06,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:45:06,057 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2024-11-09 04:45:06,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:45:06,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2024-11-09 04:45:06,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:45:06,070 INFO L225 Difference]: With dead ends: 30 [2024-11-09 04:45:06,070 INFO L226 Difference]: Without dead ends: 29 [2024-11-09 04:45:06,072 INFO L431 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 [2024-11-09 04:45:06,078 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:45:06,080 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 38 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:45:06,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-09 04:45:06,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-09 04:45:06,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:06,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2024-11-09 04:45:06,113 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 2 [2024-11-09 04:45:06,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:45:06,113 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2024-11-09 04:45:06,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:06,114 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2024-11-09 04:45:06,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2024-11-09 04:45:06,114 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:45:06,114 INFO L215 NwaCegarLoop]: trace histogram [1, 1] [2024-11-09 04:45:06,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 04:45:06,115 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:45:06,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:45:06,116 INFO L85 PathProgramCache]: Analyzing trace with hash 3800, now seen corresponding path program 1 times [2024-11-09 04:45:06,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:45:06,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905346607] [2024-11-09 04:45:06,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:45:06,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:45:06,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:45:06,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:45:06,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:45:06,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905346607] [2024-11-09 04:45:06,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905346607] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:45:06,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:45:06,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 04:45:06,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712307912] [2024-11-09 04:45:06,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:45:06,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:45:06,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:45:06,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:45:06,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:45:06,409 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:06,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:45:06,462 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2024-11-09 04:45:06,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:45:06,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2024-11-09 04:45:06,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:45:06,464 INFO L225 Difference]: With dead ends: 28 [2024-11-09 04:45:06,464 INFO L226 Difference]: Without dead ends: 28 [2024-11-09 04:45:06,465 INFO L431 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 [2024-11-09 04:45:06,467 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:45:06,467 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:45:06,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-09 04:45:06,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-09 04:45:06,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 2.066666666666667) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:06,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2024-11-09 04:45:06,475 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 2 [2024-11-09 04:45:06,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:45:06,475 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2024-11-09 04:45:06,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:06,476 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2024-11-09 04:45:06,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-09 04:45:06,476 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:45:06,476 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-09 04:45:06,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 04:45:06,477 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:45:06,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:45:06,478 INFO L85 PathProgramCache]: Analyzing trace with hash 117758, now seen corresponding path program 1 times [2024-11-09 04:45:06,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:45:06,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051154143] [2024-11-09 04:45:06,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:45:06,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:45:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:45:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:45:06,691 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:45:06,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051154143] [2024-11-09 04:45:06,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051154143] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:45:06,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:45:06,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 04:45:06,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213970087] [2024-11-09 04:45:06,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:45:06,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:45:06,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:45:06,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:45:06,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:45:06,694 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:06,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:45:06,778 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2024-11-09 04:45:06,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:45:06,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2024-11-09 04:45:06,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:45:06,780 INFO L225 Difference]: With dead ends: 27 [2024-11-09 04:45:06,780 INFO L226 Difference]: Without dead ends: 27 [2024-11-09 04:45:06,780 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:45:06,781 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:45:06,784 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 51 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:45:06,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-09 04:45:06,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-09 04:45:06,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 2.0) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:06,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2024-11-09 04:45:06,788 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 3 [2024-11-09 04:45:06,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:45:06,788 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2024-11-09 04:45:06,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:06,789 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2024-11-09 04:45:06,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-11-09 04:45:06,790 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:45:06,790 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-11-09 04:45:06,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 04:45:06,791 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:45:06,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:45:06,794 INFO L85 PathProgramCache]: Analyzing trace with hash 117759, now seen corresponding path program 1 times [2024-11-09 04:45:06,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:45:06,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379732866] [2024-11-09 04:45:06,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:45:06,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:45:06,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:45:07,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:45:07,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:45:07,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379732866] [2024-11-09 04:45:07,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379732866] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:45:07,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:45:07,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 04:45:07,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218366910] [2024-11-09 04:45:07,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:45:07,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:45:07,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:45:07,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:45:07,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:45:07,015 INFO L87 Difference]: Start difference. First operand 27 states and 30 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) [2024-11-09 04:45:07,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:45:07,055 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2024-11-09 04:45:07,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:45:07,056 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 [2024-11-09 04:45:07,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:45:07,057 INFO L225 Difference]: With dead ends: 26 [2024-11-09 04:45:07,058 INFO L226 Difference]: Without dead ends: 26 [2024-11-09 04:45:07,058 INFO L431 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 [2024-11-09 04:45:07,059 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:45:07,062 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:45:07,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-09 04:45:07,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-09 04:45:07,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:07,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2024-11-09 04:45:07,067 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 3 [2024-11-09 04:45:07,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:45:07,068 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2024-11-09 04:45:07,068 INFO L472 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) [2024-11-09 04:45:07,068 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2024-11-09 04:45:07,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-09 04:45:07,068 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:45:07,069 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-09 04:45:07,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 04:45:07,069 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:45:07,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:45:07,070 INFO L85 PathProgramCache]: Analyzing trace with hash 3652478, now seen corresponding path program 1 times [2024-11-09 04:45:07,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:45:07,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874134673] [2024-11-09 04:45:07,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:45:07,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:45:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:45:07,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:45:07,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:45:07,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874134673] [2024-11-09 04:45:07,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874134673] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:45:07,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:45:07,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:45:07,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261729254] [2024-11-09 04:45:07,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:45:07,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:45:07,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:45:07,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:45:07,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:45:07,142 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:07,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:45:07,207 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2024-11-09 04:45:07,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:45:07,209 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-09 04:45:07,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:45:07,209 INFO L225 Difference]: With dead ends: 25 [2024-11-09 04:45:07,209 INFO L226 Difference]: Without dead ends: 25 [2024-11-09 04:45:07,210 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:45:07,211 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:45:07,211 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 21 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:45:07,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-09 04:45:07,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-11-09 04:45:07,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.8) internal successors, (27), 23 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) [2024-11-09 04:45:07,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-11-09 04:45:07,219 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 4 [2024-11-09 04:45:07,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:45:07,221 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-11-09 04:45:07,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:07,221 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-11-09 04:45:07,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-09 04:45:07,221 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:45:07,221 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-09 04:45:07,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 04:45:07,222 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:45:07,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:45:07,222 INFO L85 PathProgramCache]: Analyzing trace with hash 3652479, now seen corresponding path program 1 times [2024-11-09 04:45:07,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:45:07,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598886082] [2024-11-09 04:45:07,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:45:07,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:45:07,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:45:07,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:45:07,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:45:07,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598886082] [2024-11-09 04:45:07,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598886082] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:45:07,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:45:07,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:45:07,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188737556] [2024-11-09 04:45:07,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:45:07,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:45:07,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:45:07,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:45:07,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:45:07,338 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:07,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:45:07,429 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2024-11-09 04:45:07,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:45:07,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-09 04:45:07,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:45:07,431 INFO L225 Difference]: With dead ends: 41 [2024-11-09 04:45:07,431 INFO L226 Difference]: Without dead ends: 41 [2024-11-09 04:45:07,431 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:45:07,432 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:45:07,433 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 51 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:45:07,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-09 04:45:07,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 27. [2024-11-09 04:45:07,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:07,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-09 04:45:07,440 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 4 [2024-11-09 04:45:07,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:45:07,441 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-09 04:45:07,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:07,441 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-09 04:45:07,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 04:45:07,441 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:45:07,442 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:45:07,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 04:45:07,442 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:45:07,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:45:07,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1436794266, now seen corresponding path program 1 times [2024-11-09 04:45:07,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:45:07,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260184229] [2024-11-09 04:45:07,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:45:07,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:45:07,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:45:07,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:45:07,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:45:07,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260184229] [2024-11-09 04:45:07,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260184229] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:45:07,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:45:07,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:45:07,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278829739] [2024-11-09 04:45:07,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:45:07,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:45:07,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:45:07,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:45:07,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:45:07,533 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:07,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:45:07,589 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2024-11-09 04:45:07,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:45:07,591 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 04:45:07,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:45:07,591 INFO L225 Difference]: With dead ends: 24 [2024-11-09 04:45:07,591 INFO L226 Difference]: Without dead ends: 24 [2024-11-09 04:45:07,592 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:45:07,592 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:45:07,593 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 16 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:45:07,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-09 04:45:07,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-09 04:45:07,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 23 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) [2024-11-09 04:45:07,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-11-09 04:45:07,601 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 7 [2024-11-09 04:45:07,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:45:07,601 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-11-09 04:45:07,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:07,603 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-11-09 04:45:07,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 04:45:07,604 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:45:07,604 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:45:07,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 04:45:07,604 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:45:07,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:45:07,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1436794267, now seen corresponding path program 1 times [2024-11-09 04:45:07,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:45:07,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728353402] [2024-11-09 04:45:07,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:45:07,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:45:07,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:45:07,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:45:07,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:45:07,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728353402] [2024-11-09 04:45:07,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728353402] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:45:07,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:45:07,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:45:07,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146065471] [2024-11-09 04:45:07,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:45:07,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:45:07,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:45:07,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:45:07,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:45:07,810 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:07,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:45:07,898 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2024-11-09 04:45:07,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:45:07,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 04:45:07,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:45:07,899 INFO L225 Difference]: With dead ends: 29 [2024-11-09 04:45:07,899 INFO L226 Difference]: Without dead ends: 29 [2024-11-09 04:45:07,901 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:45:07,903 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 31 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:45:07,903 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 27 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:45:07,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-09 04:45:07,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-09 04:45:07,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 28 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) [2024-11-09 04:45:07,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2024-11-09 04:45:07,910 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 7 [2024-11-09 04:45:07,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:45:07,910 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2024-11-09 04:45:07,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:07,910 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2024-11-09 04:45:07,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-09 04:45:07,911 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:45:07,911 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:45:07,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 04:45:07,911 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:45:07,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:45:07,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1590881226, now seen corresponding path program 1 times [2024-11-09 04:45:07,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:45:07,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218313407] [2024-11-09 04:45:07,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:45:07,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:45:07,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:45:08,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:45:08,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:45:08,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218313407] [2024-11-09 04:45:08,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218313407] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:45:08,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:45:08,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 04:45:08,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918201765] [2024-11-09 04:45:08,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:45:08,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:45:08,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:45:08,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:45:08,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:45:08,103 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2024-11-09 04:45:08,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:45:08,140 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2024-11-09 04:45:08,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:45:08,141 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 [2024-11-09 04:45:08,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:45:08,142 INFO L225 Difference]: With dead ends: 28 [2024-11-09 04:45:08,146 INFO L226 Difference]: Without dead ends: 25 [2024-11-09 04:45:08,146 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:45:08,147 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:45:08,147 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 28 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:45:08,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-09 04:45:08,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-09 04:45:08,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.45) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:08,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-11-09 04:45:08,153 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 8 [2024-11-09 04:45:08,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:45:08,153 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-11-09 04:45:08,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2024-11-09 04:45:08,154 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-11-09 04:45:08,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-09 04:45:08,155 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:45:08,155 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:45:08,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 04:45:08,156 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:45:08,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:45:08,157 INFO L85 PathProgramCache]: Analyzing trace with hash -104759712, now seen corresponding path program 1 times [2024-11-09 04:45:08,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:45:08,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676155792] [2024-11-09 04:45:08,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:45:08,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:45:08,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:45:08,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:45:08,192 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:45:08,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676155792] [2024-11-09 04:45:08,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676155792] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:45:08,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:45:08,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:45:08,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440904659] [2024-11-09 04:45:08,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:45:08,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:45:08,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:45:08,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:45:08,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:45:08,195 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:08,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:45:08,221 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2024-11-09 04:45:08,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:45:08,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-09 04:45:08,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:45:08,223 INFO L225 Difference]: With dead ends: 27 [2024-11-09 04:45:08,223 INFO L226 Difference]: Without dead ends: 27 [2024-11-09 04:45:08,223 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:45:08,224 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 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 [2024-11-09 04:45:08,224 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:45:08,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-09 04:45:08,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-09 04:45:08,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:08,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-09 04:45:08,231 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 10 [2024-11-09 04:45:08,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:45:08,231 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-09 04:45:08,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:08,232 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-09 04:45:08,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 04:45:08,232 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:45:08,232 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:45:08,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 04:45:08,233 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:45:08,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:45:08,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1047263964, now seen corresponding path program 1 times [2024-11-09 04:45:08,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:45:08,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861906718] [2024-11-09 04:45:08,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:45:08,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:45:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:45:08,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:45:08,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:45:08,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861906718] [2024-11-09 04:45:08,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861906718] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:45:08,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054930370] [2024-11-09 04:45:08,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:45:08,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:45:08,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:45:08,584 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:45:08,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 04:45:08,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:45:08,675 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-09 04:45:08,681 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:45:08,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 04:45:08,934 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:45:08,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 25 [2024-11-09 04:45:09,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:45:09,032 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:45:09,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-09 04:45:09,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-09 04:45:09,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-11-09 04:45:09,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:45:09,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054930370] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:45:09,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1336063263] [2024-11-09 04:45:09,319 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 04:45:09,320 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:45:09,324 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:45:09,329 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:45:09,329 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:45:10,261 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:45:12,095 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '708#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:45:12,096 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:45:12,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:45:12,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2024-11-09 04:45:12,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643728216] [2024-11-09 04:45:12,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:45:12,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 04:45:12,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:45:12,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 04:45:12,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=694, Unknown=3, NotChecked=0, Total=812 [2024-11-09 04:45:12,101 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:12,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:45:12,538 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2024-11-09 04:45:12,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 04:45:12,539 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-09 04:45:12,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:45:12,541 INFO L225 Difference]: With dead ends: 32 [2024-11-09 04:45:12,541 INFO L226 Difference]: Without dead ends: 32 [2024-11-09 04:45:12,542 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=195, Invalid=1062, Unknown=3, NotChecked=0, Total=1260 [2024-11-09 04:45:12,543 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 81 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:45:12,543 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 23 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:45:12,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-09 04:45:12,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2024-11-09 04:45:12,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 23 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) [2024-11-09 04:45:12,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2024-11-09 04:45:12,548 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 11 [2024-11-09 04:45:12,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:45:12,549 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2024-11-09 04:45:12,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:12,550 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2024-11-09 04:45:12,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-09 04:45:12,553 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:45:12,553 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:45:12,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 04:45:12,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:45:12,754 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:45:12,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:45:12,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1889873588, now seen corresponding path program 1 times [2024-11-09 04:45:12,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:45:12,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46614217] [2024-11-09 04:45:12,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:45:12,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:45:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:45:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:45:12,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:45:12,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46614217] [2024-11-09 04:45:12,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46614217] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:45:12,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:45:12,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 04:45:12,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028414983] [2024-11-09 04:45:12,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:45:12,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 04:45:12,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:45:12,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 04:45:12,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-09 04:45:12,875 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 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) [2024-11-09 04:45:12,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:45:12,989 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2024-11-09 04:45:12,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 04:45:12,989 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 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 [2024-11-09 04:45:12,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:45:12,990 INFO L225 Difference]: With dead ends: 26 [2024-11-09 04:45:12,990 INFO L226 Difference]: Without dead ends: 23 [2024-11-09 04:45:12,990 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-09 04:45:12,991 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 21 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:45:12,991 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 21 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:45:12,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-09 04:45:12,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-09 04:45:12,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:12,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2024-11-09 04:45:12,994 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 12 [2024-11-09 04:45:12,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:45:12,994 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2024-11-09 04:45:12,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 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) [2024-11-09 04:45:12,994 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2024-11-09 04:45:12,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 04:45:12,995 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:45:12,995 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:45:12,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 04:45:12,995 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:45:12,996 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:45:12,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1398283976, now seen corresponding path program 1 times [2024-11-09 04:45:12,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:45:12,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879621309] [2024-11-09 04:45:12,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:45:12,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:45:13,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:45:13,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:45:13,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:45:13,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879621309] [2024-11-09 04:45:13,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879621309] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:45:13,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487232542] [2024-11-09 04:45:13,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:45:13,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:45:13,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:45:13,392 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:45:13,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 04:45:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:45:13,474 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-09 04:45:13,476 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:45:13,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-09 04:45:13,585 INFO L349 Elim1Store]: treesize reduction 32, result has 23.8 percent of original size [2024-11-09 04:45:13,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2024-11-09 04:45:14,407 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:45:14,443 INFO L349 Elim1Store]: treesize reduction 50, result has 29.6 percent of original size [2024-11-09 04:45:14,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 41 [2024-11-09 04:45:14,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:45:14,610 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:45:15,183 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:45:15,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 82 [2024-11-09 04:45:15,195 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:45:15,206 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:45:15,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 37 [2024-11-09 04:45:15,226 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:45:15,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2024-11-09 04:45:15,246 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:45:15,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2024-11-09 04:45:15,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2024-11-09 04:45:15,315 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:45:15,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 53 [2024-11-09 04:45:15,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:45:15,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487232542] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:45:15,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1501903609] [2024-11-09 04:45:15,597 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-09 04:45:15,598 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:45:15,599 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:45:15,599 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:45:15,599 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:45:16,535 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:45:19,646 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '953#(exists ((|v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_23| Int) (|v_ULTIMATE.start_cstrpbrk_~sc1~0#1.base_25| Int)) (and (<= 1 |#StackHeapBarrier|) (= (select |#valid| |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.base_25|) 1) (<= 2 |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.base_25|) (<= 1 |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_23|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (exists ((|v_ULTIMATE.start_cstrpbrk_~s~0#1.base_34| Int)) (and (<= 1 (select |#length| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_34|)) (<= 2 |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_34|) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.base_25|) (+ (- 1) |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_23|)) (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_34|) 0)) (= (select |#valid| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_34|) 1) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_34|) 0) 0)) (or (and (= (mod (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.base_25|) (+ (- 1) |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_23|)) 256) (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_34|) 0)) (<= (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.base_25|) (+ (- 1) |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_23|)) 127)) (and (<= 128 (mod (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.base_25|) (+ (- 1) |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_23|)) 256)) (= (mod (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.base_25|) (+ (- 1) |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_23|)) 256) (+ 256 (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_34|) 0))))))) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (= |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_23| (select |#length| |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.base_25|)) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|)))' at error location [2024-11-09 04:45:19,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:45:19,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:45:19,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 26 [2024-11-09 04:45:19,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368661540] [2024-11-09 04:45:19,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:45:19,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 04:45:19,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:45:19,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 04:45:19,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1360, Unknown=2, NotChecked=0, Total=1560 [2024-11-09 04:45:19,648 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 28 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:20,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:45:20,624 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2024-11-09 04:45:20,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 04:45:20,624 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 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 13 [2024-11-09 04:45:20,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:45:20,625 INFO L225 Difference]: With dead ends: 51 [2024-11-09 04:45:20,625 INFO L226 Difference]: Without dead ends: 51 [2024-11-09 04:45:20,626 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=332, Invalid=2018, Unknown=2, NotChecked=0, Total=2352 [2024-11-09 04:45:20,627 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 63 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:45:20,627 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 54 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:45:20,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-09 04:45:20,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2024-11-09 04:45:20,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:20,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2024-11-09 04:45:20,630 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 13 [2024-11-09 04:45:20,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:45:20,631 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2024-11-09 04:45:20,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:20,631 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2024-11-09 04:45:20,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 04:45:20,631 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:45:20,632 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:45:20,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 04:45:20,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:45:20,832 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:45:20,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:45:20,833 INFO L85 PathProgramCache]: Analyzing trace with hash -496914531, now seen corresponding path program 2 times [2024-11-09 04:45:20,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:45:20,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635959628] [2024-11-09 04:45:20,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:45:20,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:45:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:45:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:45:21,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:45:21,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635959628] [2024-11-09 04:45:21,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635959628] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:45:21,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459711556] [2024-11-09 04:45:21,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:45:21,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:45:21,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:45:21,420 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:45:21,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 04:45:21,512 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 04:45:21,512 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:45:21,514 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-09 04:45:21,516 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:45:21,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-09 04:45:25,934 INFO L349 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2024-11-09 04:45:25,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 49 [2024-11-09 04:45:26,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:45:26,221 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:45:26,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2024-11-09 04:45:26,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 04:45:26,810 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:45:26,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 47 [2024-11-09 04:45:26,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:45:26,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459711556] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:45:26,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1158081364] [2024-11-09 04:45:26,840 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 04:45:26,840 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:45:26,840 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:45:26,840 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:45:26,840 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:45:27,272 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:45:29,023 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1180#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:45:29,023 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:45:29,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:45:29,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 26 [2024-11-09 04:45:29,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135406310] [2024-11-09 04:45:29,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:45:29,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 04:45:29,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:45:29,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 04:45:29,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1242, Unknown=5, NotChecked=0, Total=1406 [2024-11-09 04:45:29,026 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 28 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:30,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:45:30,967 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2024-11-09 04:45:30,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 04:45:30,968 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 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 15 [2024-11-09 04:45:30,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:45:30,968 INFO L225 Difference]: With dead ends: 64 [2024-11-09 04:45:30,968 INFO L226 Difference]: Without dead ends: 64 [2024-11-09 04:45:30,969 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=341, Invalid=2103, Unknown=6, NotChecked=0, Total=2450 [2024-11-09 04:45:30,970 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 158 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:45:30,970 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 36 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:45:30,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-11-09 04:45:30,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 50. [2024-11-09 04:45:30,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 49 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:30,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2024-11-09 04:45:30,974 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 15 [2024-11-09 04:45:30,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:45:30,974 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2024-11-09 04:45:30,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:30,975 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2024-11-09 04:45:30,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 04:45:30,975 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:45:30,975 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2024-11-09 04:45:30,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 04:45:31,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:45:31,176 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:45:31,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:45:31,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1813488225, now seen corresponding path program 2 times [2024-11-09 04:45:31,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:45:31,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714908396] [2024-11-09 04:45:31,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:45:31,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:45:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:45:31,858 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:45:31,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:45:31,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714908396] [2024-11-09 04:45:31,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714908396] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:45:31,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110491384] [2024-11-09 04:45:31,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:45:31,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:45:31,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:45:31,860 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:45:31,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 04:45:31,957 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 04:45:31,957 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:45:31,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-09 04:45:31,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:45:31,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-09 04:45:31,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 04:45:32,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-09 04:45:32,116 INFO L349 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2024-11-09 04:45:32,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2024-11-09 04:45:36,081 INFO L349 Elim1Store]: treesize reduction 98, result has 52.7 percent of original size [2024-11-09 04:45:36,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 72 treesize of output 136 [2024-11-09 04:45:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:45:37,075 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:45:38,362 INFO L349 Elim1Store]: treesize reduction 16, result has 66.7 percent of original size [2024-11-09 04:45:38,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 326 treesize of output 328 [2024-11-09 04:45:38,404 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:45:38,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 68 [2024-11-09 04:45:38,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2024-11-09 04:45:38,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:45:38,624 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:45:38,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 88 [2024-11-09 04:45:38,769 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:45:38,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 316 treesize of output 288 [2024-11-09 04:45:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:45:39,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110491384] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:45:39,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1099374243] [2024-11-09 04:45:39,935 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-09 04:45:39,935 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:45:39,935 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:45:39,935 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:45:39,935 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:45:40,788 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:45:44,193 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1493#(exists ((|v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_34| Int) (|v_ULTIMATE.start_cstrpbrk_~sc1~0#1.base_36| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 1 |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_34|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.base_36|) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|) (= (select |#valid| |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.base_36|) 1) (= (select |#length| |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.base_36|) |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_34|) (exists ((|v_ULTIMATE.start_cstrpbrk_~s~0#1.base_52| Int)) (and (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_52|) 0) 0)) (<= 2 |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_52|) (<= 1 (select |#length| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_52|)) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_52|) 0) (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.base_36|) (+ (- 1) |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_34|))) (or (and (<= 128 (mod (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_52|) 0) 256)) (= (+ 256 (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_52|) 0)) (mod (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_52|) 0) 256))) (and (= (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_52|) 0) (mod (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_52|) 0) 256)) (<= (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_52|) 0) 127))) (= (select |#valid| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_52|) 1)))))' at error location [2024-11-09 04:45:44,193 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:45:44,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:45:44,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 15, 15] total 37 [2024-11-09 04:45:44,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866020499] [2024-11-09 04:45:44,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:45:44,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-09 04:45:44,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:45:44,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-09 04:45:44,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=2291, Unknown=2, NotChecked=0, Total=2550 [2024-11-09 04:45:44,196 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 39 states, 38 states have (on average 1.736842105263158) internal successors, (66), 38 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:46,751 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] [2024-11-09 04:45:50,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:45:50,514 INFO L93 Difference]: Finished difference Result 123 states and 143 transitions. [2024-11-09 04:45:50,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 04:45:50,514 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.736842105263158) internal successors, (66), 38 states have internal predecessors, (66), 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 [2024-11-09 04:45:50,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:45:50,515 INFO L225 Difference]: With dead ends: 123 [2024-11-09 04:45:50,515 INFO L226 Difference]: Without dead ends: 123 [2024-11-09 04:45:50,517 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=629, Invalid=4771, Unknown=2, NotChecked=0, Total=5402 [2024-11-09 04:45:50,517 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 183 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:45:50,517 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 78 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 680 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2024-11-09 04:45:50,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-09 04:45:50,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 81. [2024-11-09 04:45:50,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 79 states have (on average 1.2151898734177216) internal successors, (96), 80 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:50,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2024-11-09 04:45:50,523 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 22 [2024-11-09 04:45:50,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:45:50,524 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2024-11-09 04:45:50,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.736842105263158) internal successors, (66), 38 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:50,524 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2024-11-09 04:45:50,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-09 04:45:50,525 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:45:50,525 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:45:50,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 04:45:50,729 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 04:45:50,729 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:45:50,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:45:50,729 INFO L85 PathProgramCache]: Analyzing trace with hash 999718815, now seen corresponding path program 3 times [2024-11-09 04:45:50,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:45:50,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22881629] [2024-11-09 04:45:50,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:45:50,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:45:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:45:51,498 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:45:51,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:45:51,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22881629] [2024-11-09 04:45:51,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22881629] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:45:51,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264711823] [2024-11-09 04:45:51,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:45:51,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:45:51,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:45:51,502 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:45:51,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 04:45:51,600 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:45:51,600 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:45:51,602 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-09 04:45:51,606 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:45:51,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 04:45:52,345 INFO L349 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2024-11-09 04:45:52,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 55 treesize of output 49 [2024-11-09 04:45:52,468 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:45:52,469 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:45:53,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2024-11-09 04:45:53,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-09 04:45:53,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 45 [2024-11-09 04:45:53,549 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:45:53,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264711823] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:45:53,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [718468482] [2024-11-09 04:45:53,550 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 04:45:53,551 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:45:53,551 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:45:53,551 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:45:53,551 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:45:53,941 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:45:55,797 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1928#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:45:55,798 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:45:55,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:45:55,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 15] total 39 [2024-11-09 04:45:55,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669320383] [2024-11-09 04:45:55,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:45:55,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-09 04:45:55,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:45:55,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-09 04:45:55,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=2286, Unknown=3, NotChecked=0, Total=2550 [2024-11-09 04:45:55,800 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 41 states, 40 states have (on average 1.725) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:58,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:45:58,312 INFO L93 Difference]: Finished difference Result 162 states and 192 transitions. [2024-11-09 04:45:58,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 04:45:58,313 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.725) internal successors, (69), 40 states have internal predecessors, (69), 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 [2024-11-09 04:45:58,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:45:58,314 INFO L225 Difference]: With dead ends: 162 [2024-11-09 04:45:58,314 INFO L226 Difference]: Without dead ends: 162 [2024-11-09 04:45:58,315 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=705, Invalid=4992, Unknown=3, NotChecked=0, Total=5700 [2024-11-09 04:45:58,316 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 190 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 04:45:58,316 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 97 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 04:45:58,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-11-09 04:45:58,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 129. [2024-11-09 04:45:58,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 127 states have (on average 1.2283464566929134) internal successors, (156), 128 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:58,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 156 transitions. [2024-11-09 04:45:58,324 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 156 transitions. Word has length 23 [2024-11-09 04:45:58,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:45:58,325 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 156 transitions. [2024-11-09 04:45:58,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.725) internal successors, (69), 40 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:45:58,325 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 156 transitions. [2024-11-09 04:45:58,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 04:45:58,326 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:45:58,327 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2024-11-09 04:45:58,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 04:45:58,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 04:45:58,531 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:45:58,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:45:58,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1347647785, now seen corresponding path program 1 times [2024-11-09 04:45:58,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:45:58,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207642093] [2024-11-09 04:45:58,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:45:58,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:45:58,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:45:59,229 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 04:45:59,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:45:59,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207642093] [2024-11-09 04:45:59,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207642093] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:45:59,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238640785] [2024-11-09 04:45:59,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:45:59,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:45:59,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:45:59,232 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:45:59,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 04:45:59,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:45:59,340 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-09 04:45:59,344 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:45:59,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 04:45:59,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-09 04:45:59,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2024-11-09 04:46:01,649 INFO L349 Elim1Store]: treesize reduction 45, result has 81.1 percent of original size [2024-11-09 04:46:01,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 77 treesize of output 220 [2024-11-09 04:46:04,841 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-09 04:46:07,443 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:46:07,443 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:46:09,134 WARN L851 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrpbrk_~s~0#1.offset| Int) (|v_ULTIMATE.start_cstrpbrk_~s~0#1.offset_68| Int) (|v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_42| Int) (v_ArrVal_194 (Array Int Int)) (|v_ULTIMATE.start_cstrpbrk_~s~0#1.base_73| Int) (|v_ULTIMATE.start_cstrpbrk_~s~0#1.base_71| Int) (|ULTIMATE.start_cstrpbrk_~s~0#1.base| Int) (|v_ULTIMATE.start_cstrpbrk_~s~0#1.offset_70| Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_194))) (let ((.cse0 (select .cse2 |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (let ((.cse3 (select .cse0 (+ |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_42| 1))) (.cse1 (select (select .cse2 |ULTIMATE.start_cstrpbrk_~s~0#1.base|) |ULTIMATE.start_cstrpbrk_~s~0#1.offset|)) (.cse4 (select (select .cse2 |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_71|) |v_ULTIMATE.start_cstrpbrk_~s~0#1.offset_68|))) (or (not (= (select .cse0 |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_42|) .cse1)) (< (+ |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_42| 3) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (not (= (select (select .cse2 |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_73|) |v_ULTIMATE.start_cstrpbrk_~s~0#1.offset_70|) .cse3)) (= .cse4 0) (= .cse3 0) (= .cse1 0) (< |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_42| 0) (not (= .cse4 (select .cse0 (+ |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_42| 2)))) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_42|)))))) is different from false [2024-11-09 04:46:09,159 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:46:09,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 190 treesize of output 102 [2024-11-09 04:46:09,335 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:46:09,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 305 treesize of output 453 [2024-11-09 04:46:09,502 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:46:09,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 200 treesize of output 268 [2024-11-09 04:46:09,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 04:48:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:48:26,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238640785] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:48:26,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [127977429] [2024-11-09 04:48:26,682 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-09 04:48:26,682 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:48:26,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:48:26,683 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:48:26,683 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:48:27,958 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:48:33,693 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2531#(exists ((|v_ULTIMATE.start_cstrpbrk_~sc1~0#1.base_49| Int) (|v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_47| Int)) (and (<= 1 |#StackHeapBarrier|) (<= (select |#length| |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.base_49|) |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_47|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.base_49|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 1 |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_47|) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|) (exists ((|v_ULTIMATE.start_cstrpbrk_~s~0#1.base_87| Int) (|v_ULTIMATE.start_cstrpbrk_~s~0#1.offset_84| Int)) (and (or (and (<= 128 (mod (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_87|) |v_ULTIMATE.start_cstrpbrk_~s~0#1.offset_84|) 256)) (= (+ (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_87|) |v_ULTIMATE.start_cstrpbrk_~s~0#1.offset_84|) 256) (mod (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_87|) |v_ULTIMATE.start_cstrpbrk_~s~0#1.offset_84|) 256))) (and (<= (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_87|) |v_ULTIMATE.start_cstrpbrk_~s~0#1.offset_84|) 127) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_87|) |v_ULTIMATE.start_cstrpbrk_~s~0#1.offset_84|) (mod (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_87|) |v_ULTIMATE.start_cstrpbrk_~s~0#1.offset_84|) 256)))) (<= (+ 1 |v_ULTIMATE.start_cstrpbrk_~s~0#1.offset_84|) (select |#length| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_87|)) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_87|) |v_ULTIMATE.start_cstrpbrk_~s~0#1.offset_84|) 0)) (<= 0 |v_ULTIMATE.start_cstrpbrk_~s~0#1.offset_84|) (<= 2 |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_87|) (= (select |#valid| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_87|) 1)))))' at error location [2024-11-09 04:48:33,693 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:48:33,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:48:33,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 19, 19] total 46 [2024-11-09 04:48:33,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245723039] [2024-11-09 04:48:33,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:48:33,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-09 04:48:33,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:48:33,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-09 04:48:33,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=3099, Unknown=4, NotChecked=114, Total=3540 [2024-11-09 04:48:33,696 INFO L87 Difference]: Start difference. First operand 129 states and 156 transitions. Second operand has 48 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 47 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:48:38,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:48:38,885 INFO L93 Difference]: Finished difference Result 319 states and 383 transitions. [2024-11-09 04:48:38,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-09 04:48:38,885 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 47 states have internal predecessors, (102), 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 35 [2024-11-09 04:48:38,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:48:38,887 INFO L225 Difference]: With dead ends: 319 [2024-11-09 04:48:38,887 INFO L226 Difference]: Without dead ends: 319 [2024-11-09 04:48:38,893 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2251 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=964, Invalid=7408, Unknown=4, NotChecked=180, Total=8556 [2024-11-09 04:48:38,893 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 252 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 04:48:38,894 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 148 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 933 Invalid, 0 Unknown, 91 Unchecked, 1.5s Time] [2024-11-09 04:48:38,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2024-11-09 04:48:38,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 272. [2024-11-09 04:48:38,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 270 states have (on average 1.237037037037037) internal successors, (334), 271 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:48:38,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 334 transitions. [2024-11-09 04:48:38,905 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 334 transitions. Word has length 35 [2024-11-09 04:48:38,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:48:38,906 INFO L471 AbstractCegarLoop]: Abstraction has 272 states and 334 transitions. [2024-11-09 04:48:38,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 47 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:48:38,906 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 334 transitions. [2024-11-09 04:48:38,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 04:48:38,907 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:48:38,908 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:48:38,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 04:48:39,112 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 04:48:39,112 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:48:39,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:48:39,113 INFO L85 PathProgramCache]: Analyzing trace with hash -93537885, now seen corresponding path program 4 times [2024-11-09 04:48:39,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:48:39,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665053054] [2024-11-09 04:48:39,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:48:39,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:48:39,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:48:40,426 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:48:40,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:48:40,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665053054] [2024-11-09 04:48:40,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665053054] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:48:40,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156351582] [2024-11-09 04:48:40,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:48:40,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:48:40,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:48:40,429 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:48:40,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 04:48:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:48:40,559 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-09 04:48:40,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:48:40,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-09 04:48:44,260 INFO L349 Elim1Store]: treesize reduction 28, result has 68.5 percent of original size [2024-11-09 04:48:44,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 8 case distinctions, treesize of input 102 treesize of output 105 [2024-11-09 04:48:44,274 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-11-09 04:48:44,310 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-09 04:48:44,534 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:48:44,534 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:48:48,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 103 [2024-11-09 04:48:48,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 153 [2024-11-09 04:48:48,444 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-11-09 04:48:48,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 04:48:48,506 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:48:48,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156351582] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:48:48,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [514919721] [2024-11-09 04:48:48,508 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 04:48:48,508 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:48:48,509 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:48:48,509 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:48:48,509 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:48:48,743 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:48:51,706 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3496#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:48:51,706 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:48:51,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:48:51,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 27, 27] total 66 [2024-11-09 04:48:51,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093484705] [2024-11-09 04:48:51,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:48:51,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-09 04:48:51,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:48:51,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-09 04:48:51,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=604, Invalid=5399, Unknown=3, NotChecked=0, Total=6006 [2024-11-09 04:48:51,710 INFO L87 Difference]: Start difference. First operand 272 states and 334 transitions. Second operand has 68 states, 67 states have (on average 1.7164179104477613) internal successors, (115), 67 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:49:19,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:49:19,298 INFO L93 Difference]: Finished difference Result 629 states and 754 transitions. [2024-11-09 04:49:19,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-09 04:49:19,299 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.7164179104477613) internal successors, (115), 67 states have internal predecessors, (115), 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 39 [2024-11-09 04:49:19,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:49:19,302 INFO L225 Difference]: With dead ends: 629 [2024-11-09 04:49:19,302 INFO L226 Difference]: Without dead ends: 629 [2024-11-09 04:49:19,306 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3988 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=1854, Invalid=13886, Unknown=10, NotChecked=0, Total=15750 [2024-11-09 04:49:19,307 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 592 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 1746 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 1762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:49:19,307 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 236 Invalid, 1762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1746 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-09 04:49:19,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2024-11-09 04:49:19,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 496. [2024-11-09 04:49:19,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 494 states have (on average 1.242914979757085) internal successors, (614), 495 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:49:19,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 614 transitions. [2024-11-09 04:49:19,333 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 614 transitions. Word has length 39 [2024-11-09 04:49:19,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:49:19,333 INFO L471 AbstractCegarLoop]: Abstraction has 496 states and 614 transitions. [2024-11-09 04:49:19,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.7164179104477613) internal successors, (115), 67 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:49:19,334 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 614 transitions. [2024-11-09 04:49:19,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-09 04:49:19,337 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:49:19,337 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1] [2024-11-09 04:49:19,360 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 04:49:19,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 04:49:19,541 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:49:19,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:49:19,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1751596136, now seen corresponding path program 3 times [2024-11-09 04:49:19,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:49:19,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563160375] [2024-11-09 04:49:19,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:49:19,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:49:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:49:21,633 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:49:21,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:49:21,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563160375] [2024-11-09 04:49:21,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563160375] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:49:21,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322191460] [2024-11-09 04:49:21,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:49:21,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:49:21,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:49:21,635 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:49:21,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 04:49:21,770 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:49:21,771 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:49:21,774 INFO L255 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 143 conjuncts are in the unsatisfiable core [2024-11-09 04:49:21,778 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:49:21,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 04:49:21,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 04:49:21,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2024-11-09 04:49:27,721 INFO L349 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2024-11-09 04:49:27,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 22 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 7 case distinctions, treesize of input 98 treesize of output 64 [2024-11-09 04:49:27,728 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-09 04:49:27,734 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-09 04:49:27,912 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:49:27,912 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:49:34,714 INFO L349 Elim1Store]: treesize reduction 96, result has 54.5 percent of original size [2024-11-09 04:49:34,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 2007 treesize of output 1514 [2024-11-09 04:49:34,766 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:49:34,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 949 treesize of output 885 [2024-11-09 04:49:34,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-09 04:49:35,673 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:49:35,718 INFO L349 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2024-11-09 04:49:35,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 22 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 120 treesize of output 107 [2024-11-09 04:49:35,869 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:49:35,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 533 treesize of output 582 [2024-11-09 04:49:50,107 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-09 04:49:50,120 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-09 04:49:50,144 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-09 04:49:50,161 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-09 04:49:50,177 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-09 04:49:50,188 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-09 04:49:50,223 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-11-09 04:49:50,250 WARN L672 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2024-11-09 04:49:50,309 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-09 04:49:50,335 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-09 04:49:50,350 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-09 04:49:50,368 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-09 04:49:50,383 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-09 04:49:50,389 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-09 04:49:50,406 WARN L672 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2024-11-09 04:49:50,422 WARN L672 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2024-11-09 04:49:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:49:50,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322191460] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:49:50,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [546656356] [2024-11-09 04:49:50,649 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-09 04:49:50,649 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:49:50,649 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:49:50,649 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:49:50,650 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:49:51,149 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:49:56,360 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5209#(exists ((|v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_67| Int) (|v_ULTIMATE.start_cstrpbrk_~sc1~0#1.base_69| Int)) (and (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_67| (select |#length| |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.base_69|)) (<= 1 |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_67|) (<= 2 |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.base_69|) (= (select |#valid| |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.base_69|) 1) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|) (exists ((|v_ULTIMATE.start_cstrpbrk_~s~0#1.base_126| Int)) (and (= (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.base_69|) (+ (- 1) |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_67|)) (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_126|) 0)) (or (and (<= 128 (mod (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_126|) 0) 256)) (= (+ 256 (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_126|) 0)) (mod (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_126|) 0) 256))) (and (= (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_126|) 0) (mod (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_126|) 0) 256)) (<= (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_126|) 0) 127))) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_126|) 0) 0)) (= (select |#valid| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_126|) 1) (<= 2 |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_126|) (<= 1 (select |#length| |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_126|))))))' at error location [2024-11-09 04:49:56,360 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:49:56,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:49:56,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 33, 33] total 84 [2024-11-09 04:49:56,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615098234] [2024-11-09 04:49:56,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:49:56,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-11-09 04:49:56,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:49:56,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-11-09 04:49:56,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=647, Invalid=8857, Unknown=2, NotChecked=0, Total=9506 [2024-11-09 04:49:56,365 INFO L87 Difference]: Start difference. First operand 496 states and 614 transitions. Second operand has 86 states, 85 states have (on average 2.364705882352941) internal successors, (201), 85 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:50:46,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:50:46,206 INFO L93 Difference]: Finished difference Result 2555 states and 3119 transitions. [2024-11-09 04:50:46,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2024-11-09 04:50:46,207 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 2.364705882352941) internal successors, (201), 85 states have internal predecessors, (201), 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 67 [2024-11-09 04:50:46,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:50:46,216 INFO L225 Difference]: With dead ends: 2555 [2024-11-09 04:50:46,216 INFO L226 Difference]: Without dead ends: 2555 [2024-11-09 04:50:46,224 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23671 ImplicationChecksByTransitivity, 58.8s TimeCoverageRelationStatistics Valid=6939, Invalid=65151, Unknown=2, NotChecked=0, Total=72092 [2024-11-09 04:50:46,225 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 1538 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 4247 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1538 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 4426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 4247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:50:46,225 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1538 Valid, 819 Invalid, 4426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 4247 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2024-11-09 04:50:46,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2024-11-09 04:50:46,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 933. [2024-11-09 04:50:46,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 931 states have (on average 1.2212674543501612) internal successors, (1137), 932 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:50:46,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1137 transitions. [2024-11-09 04:50:46,261 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1137 transitions. Word has length 67 [2024-11-09 04:50:46,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:50:46,262 INFO L471 AbstractCegarLoop]: Abstraction has 933 states and 1137 transitions. [2024-11-09 04:50:46,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 2.364705882352941) internal successors, (201), 85 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:50:46,262 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1137 transitions. [2024-11-09 04:50:46,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-09 04:50:46,267 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:50:46,267 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:50:46,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 04:50:46,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:50:46,468 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:50:46,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:50:46,468 INFO L85 PathProgramCache]: Analyzing trace with hash -888957525, now seen corresponding path program 5 times [2024-11-09 04:50:46,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:50:46,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359215575] [2024-11-09 04:50:46,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:50:46,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:50:46,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:50:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:50:49,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:50:49,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359215575] [2024-11-09 04:50:49,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359215575] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:50:49,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088059989] [2024-11-09 04:50:49,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:50:49,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:50:49,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:50:49,345 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:50:49,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 04:50:49,633 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-09 04:50:49,633 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:50:49,642 INFO L255 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 147 conjuncts are in the unsatisfiable core [2024-11-09 04:50:49,660 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:50:49,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-09 04:56:12,387 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-09 04:56:12,388 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2024-11-09 04:56:12,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [612601081] [2024-11-09 04:56:12,390 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 04:56:12,390 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:56:12,390 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:56:12,390 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:56:12,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2024-11-09 04:56:12,392 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:56:12,395 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:326) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:220) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Broken pipe at java.base/java.io.FileOutputStream.writeBytes(Native Method) at java.base/java.io.FileOutputStream.write(FileOutputStream.java:354) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 44 more [2024-11-09 04:56:12,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-09 04:56:12,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-09 04:56:12,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7789092] [2024-11-09 04:56:12,399 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-09 04:56:12,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 04:56:12,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:56:12,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 04:56:12,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=2320, Unknown=77, NotChecked=0, Total=2652 [2024-11-09 04:56:12,401 INFO L87 Difference]: Start difference. First operand 933 states and 1137 transitions. Second operand has 23 states, 22 states have (on average 3.227272727272727) internal successors, (71), 22 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) [2024-11-09 04:56:12,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-09 04:56:12,402 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 277.4s TimeCoverageRelationStatistics Valid=255, Invalid=2320, Unknown=77, NotChecked=0, Total=2652 [2024-11-09 04:56:12,402 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:12,403 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:56:12,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 04:56:12,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:56:12,607 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@1347312d at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:460) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:104) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.chooseFalseSuccessor2(BasicAbstractInterpolantAutomaton.java:107) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:73) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:246) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:218) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:210) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:373) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 04:56:12,613 INFO L158 Benchmark]: Toolchain (without parser) took 668324.69ms. Allocated memory was 159.4MB in the beginning and 1.4GB in the end (delta: 1.2GB). Free memory was 124.0MB in the beginning and 1.1GB in the end (delta: -971.6MB). Peak memory consumption was 253.5MB. Max. memory is 16.1GB. [2024-11-09 04:56:12,615 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 113.2MB. Free memory is still 62.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 04:56:12,615 INFO L158 Benchmark]: CACSL2BoogieTranslator took 521.22ms. Allocated memory is still 159.4MB. Free memory was 124.0MB in the beginning and 105.2MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2024-11-09 04:56:12,617 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.31ms. Allocated memory is still 159.4MB. Free memory was 105.2MB in the beginning and 103.4MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 04:56:12,617 INFO L158 Benchmark]: Boogie Preprocessor took 33.93ms. Allocated memory is still 159.4MB. Free memory was 103.4MB in the beginning and 101.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 04:56:12,617 INFO L158 Benchmark]: RCFGBuilder took 493.24ms. Allocated memory is still 159.4MB. Free memory was 101.8MB in the beginning and 82.7MB in the end (delta: 19.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2024-11-09 04:56:12,618 INFO L158 Benchmark]: TraceAbstraction took 667208.36ms. Allocated memory was 159.4MB in the beginning and 1.4GB in the end (delta: 1.2GB). Free memory was 127.0MB in the beginning and 1.1GB in the end (delta: -968.6MB). Peak memory consumption was 254.2MB. Max. memory is 16.1GB. [2024-11-09 04:56:12,621 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 113.2MB. Free memory is still 62.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 521.22ms. Allocated memory is still 159.4MB. Free memory was 124.0MB in the beginning and 105.2MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.31ms. Allocated memory is still 159.4MB. Free memory was 105.2MB in the beginning and 103.4MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 33.93ms. Allocated memory is still 159.4MB. Free memory was 103.4MB in the beginning and 101.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 493.24ms. Allocated memory is still 159.4MB. Free memory was 101.8MB in the beginning and 82.7MB in the end (delta: 19.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 667208.36ms. Allocated memory was 159.4MB in the beginning and 1.4GB in the end (delta: 1.2GB). Free memory was 127.0MB in the beginning and 1.1GB in the end (delta: -968.6MB). Peak memory consumption was 254.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@1347312d de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@1347312d: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-memory-alloca/cstrpbrk-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 5142bd1a70b277e6c0e9690abed85caa4ceacf811cc7ce059063d386607411a7 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 04:56:15,322 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 04:56:15,454 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Bitvector.epf [2024-11-09 04:56:15,464 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 04:56:15,465 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 04:56:15,507 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 04:56:15,510 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 04:56:15,511 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 04:56:15,511 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 04:56:15,512 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 04:56:15,512 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 04:56:15,513 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 04:56:15,513 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 04:56:15,514 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 04:56:15,516 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 04:56:15,517 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 04:56:15,517 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 04:56:15,518 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 04:56:15,518 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 04:56:15,518 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 04:56:15,519 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 04:56:15,523 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 04:56:15,523 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 04:56:15,524 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 04:56:15,524 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 04:56:15,524 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 04:56:15,524 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-09 04:56:15,525 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 04:56:15,525 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-09 04:56:15,525 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 04:56:15,525 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 04:56:15,526 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 04:56:15,526 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 04:56:15,526 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 04:56:15,526 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 04:56:15,528 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:56:15,529 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 04:56:15,530 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 04:56:15,530 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2024-11-09 04:56:15,531 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-09 04:56:15,531 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 04:56:15,531 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 04:56:15,531 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5142bd1a70b277e6c0e9690abed85caa4ceacf811cc7ce059063d386607411a7 [2024-11-09 04:56:16,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 04:56:16,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 04:56:16,077 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 04:56:16,079 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 04:56:16,080 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 04:56:16,082 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/termination-memory-alloca/cstrpbrk-alloca-1.i Unable to find full path for "g++" [2024-11-09 04:56:18,426 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 04:56:18,787 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 04:56:18,787 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/sv-benchmarks/c/termination-memory-alloca/cstrpbrk-alloca-1.i [2024-11-09 04:56:18,805 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/data/7566f05e4/dccc3dd1ae864e36b108279a2be8d3d2/FLAG550d67ebc [2024-11-09 04:56:18,825 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/data/7566f05e4/dccc3dd1ae864e36b108279a2be8d3d2 [2024-11-09 04:56:18,831 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 04:56:18,833 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 04:56:18,838 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 04:56:18,838 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 04:56:18,845 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 04:56:18,847 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:56:18" (1/1) ... [2024-11-09 04:56:18,852 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6303615b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:56:18, skipping insertion in model container [2024-11-09 04:56:18,852 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:56:18" (1/1) ... [2024-11-09 04:56:18,926 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 04:56:19,428 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 04:56:19,429 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 04:56:19,436 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:56:19,452 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 04:56:19,498 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:56:19,563 INFO L204 MainTranslator]: Completed translation [2024-11-09 04:56:19,563 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:56:19 WrapperNode [2024-11-09 04:56:19,563 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 04:56:19,565 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 04:56:19,565 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 04:56:19,565 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 04:56:19,573 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:56:19" (1/1) ... [2024-11-09 04:56:19,590 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:56:19" (1/1) ... [2024-11-09 04:56:19,622 INFO L138 Inliner]: procedures = 112, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 76 [2024-11-09 04:56:19,623 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 04:56:19,624 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 04:56:19,624 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 04:56:19,624 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 04:56:19,635 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:56:19" (1/1) ... [2024-11-09 04:56:19,636 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:56:19" (1/1) ... [2024-11-09 04:56:19,640 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:56:19" (1/1) ... [2024-11-09 04:56:19,641 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:56:19" (1/1) ... [2024-11-09 04:56:19,649 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:56:19" (1/1) ... [2024-11-09 04:56:19,653 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:56:19" (1/1) ... [2024-11-09 04:56:19,654 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:56:19" (1/1) ... [2024-11-09 04:56:19,656 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:56:19" (1/1) ... [2024-11-09 04:56:19,659 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 04:56:19,660 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 04:56:19,660 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 04:56:19,660 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 04:56:19,661 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:56:19" (1/1) ... [2024-11-09 04:56:19,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:56:19,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:56:19,703 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 04:56:19,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 04:56:19,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2024-11-09 04:56:19,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 04:56:19,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2024-11-09 04:56:19,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 04:56:19,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 04:56:19,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 04:56:19,911 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 04:56:19,914 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 04:56:20,359 INFO L? ?]: Removed 56 outVars from TransFormulas that were not future-live. [2024-11-09 04:56:20,362 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 04:56:20,384 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 04:56:20,385 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-09 04:56:20,385 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:56:20 BoogieIcfgContainer [2024-11-09 04:56:20,386 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 04:56:20,389 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 04:56:20,389 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 04:56:20,393 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 04:56:20,393 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 04:56:18" (1/3) ... [2024-11-09 04:56:20,395 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49262c54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:56:20, skipping insertion in model container [2024-11-09 04:56:20,395 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:56:19" (2/3) ... [2024-11-09 04:56:20,397 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49262c54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:56:20, skipping insertion in model container [2024-11-09 04:56:20,397 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:56:20" (3/3) ... [2024-11-09 04:56:20,399 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrpbrk-alloca-1.i [2024-11-09 04:56:20,425 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 04:56:20,425 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2024-11-09 04:56:20,517 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 04:56:20,525 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@50bf51fb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 04:56:20,526 INFO L334 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2024-11-09 04:56:20,531 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 39 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:20,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 04:56:20,543 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:20,544 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 04:56:20,545 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:56:20,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:20,553 INFO L85 PathProgramCache]: Analyzing trace with hash 889510731, now seen corresponding path program 1 times [2024-11-09 04:56:20,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:56:20,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973845282] [2024-11-09 04:56:20,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:20,572 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:20,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:56:20,577 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:56:20,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-11-09 04:56:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:20,708 INFO L255 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 04:56:20,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:20,873 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2024-11-09 04:56:20,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 15 [2024-11-09 04:56:20,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:20,904 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:56:20,905 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:56:20,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973845282] [2024-11-09 04:56:20,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973845282] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:56:20,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:56:20,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 04:56:20,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745681050] [2024-11-09 04:56:20,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:56:20,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:56:20,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:56:20,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:56:20,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:56:20,960 INFO L87 Difference]: Start difference. First operand has 40 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 39 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:21,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:56:21,135 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2024-11-09 04:56:21,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:56:21,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-09 04:56:21,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:56:21,149 INFO L225 Difference]: With dead ends: 39 [2024-11-09 04:56:21,149 INFO L226 Difference]: Without dead ends: 37 [2024-11-09 04:56:21,151 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:56:21,155 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:21,157 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 61 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:56:21,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-09 04:56:21,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-11-09 04:56:21,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.826086956521739) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:21,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2024-11-09 04:56:21,199 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 6 [2024-11-09 04:56:21,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:56:21,201 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2024-11-09 04:56:21,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:21,201 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2024-11-09 04:56:21,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 04:56:21,202 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:21,202 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 04:56:21,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-11-09 04:56:21,403 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:21,404 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:56:21,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:21,405 INFO L85 PathProgramCache]: Analyzing trace with hash 889510732, now seen corresponding path program 1 times [2024-11-09 04:56:21,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:56:21,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776193458] [2024-11-09 04:56:21,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:21,408 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:21,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:56:21,414 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:56:21,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-11-09 04:56:21,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:21,496 INFO L255 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 04:56:21,499 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:21,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:56:21,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2024-11-09 04:56:21,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 04:56:21,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:21,601 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:56:21,601 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:56:21,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776193458] [2024-11-09 04:56:21,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776193458] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:56:21,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:56:21,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:56:21,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027069473] [2024-11-09 04:56:21,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:56:21,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:56:21,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:56:21,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:56:21,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:56:21,606 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:21,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:56:21,663 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2024-11-09 04:56:21,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:56:21,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-09 04:56:21,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:56:21,666 INFO L225 Difference]: With dead ends: 40 [2024-11-09 04:56:21,667 INFO L226 Difference]: Without dead ends: 40 [2024-11-09 04:56:21,667 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:56:21,669 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 1 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:21,670 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 78 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:56:21,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-09 04:56:21,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-09 04:56:21,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 39 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) [2024-11-09 04:56:21,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2024-11-09 04:56:21,677 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 6 [2024-11-09 04:56:21,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:56:21,677 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2024-11-09 04:56:21,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:21,678 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2024-11-09 04:56:21,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 04:56:21,678 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:21,678 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 04:56:21,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-11-09 04:56:21,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:21,880 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:56:21,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:21,881 INFO L85 PathProgramCache]: Analyzing trace with hash 889570314, now seen corresponding path program 1 times [2024-11-09 04:56:21,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:56:21,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1994990737] [2024-11-09 04:56:21,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:21,882 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:21,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:56:21,886 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:56:21,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-11-09 04:56:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:22,003 INFO L255 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 04:56:22,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:22,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:56:22,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2024-11-09 04:56:22,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 04:56:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:22,116 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:56:22,116 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:56:22,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1994990737] [2024-11-09 04:56:22,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1994990737] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:56:22,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:56:22,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:56:22,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407325513] [2024-11-09 04:56:22,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:56:22,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:56:22,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:56:22,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:56:22,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:56:22,120 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:22,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:56:22,152 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2024-11-09 04:56:22,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:56:22,154 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-09 04:56:22,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:56:22,155 INFO L225 Difference]: With dead ends: 39 [2024-11-09 04:56:22,155 INFO L226 Difference]: Without dead ends: 39 [2024-11-09 04:56:22,156 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:56:22,157 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:22,158 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 75 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:56:22,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-09 04:56:22,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2024-11-09 04:56:22,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:22,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2024-11-09 04:56:22,164 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 6 [2024-11-09 04:56:22,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:56:22,164 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2024-11-09 04:56:22,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:22,165 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2024-11-09 04:56:22,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 04:56:22,165 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:22,165 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:56:22,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2024-11-09 04:56:22,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:22,367 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:56:22,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:22,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1805028874, now seen corresponding path program 1 times [2024-11-09 04:56:22,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:56:22,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [824470944] [2024-11-09 04:56:22,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:22,369 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:22,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:56:22,373 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:56:22,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-11-09 04:56:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:22,453 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 04:56:22,455 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:22,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-11-09 04:56:22,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:56:22,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-11-09 04:56:22,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:22,497 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:56:22,497 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:56:22,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [824470944] [2024-11-09 04:56:22,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [824470944] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:56:22,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:56:22,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 04:56:22,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205755689] [2024-11-09 04:56:22,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:56:22,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:56:22,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:56:22,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:56:22,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:56:22,501 INFO L87 Difference]: Start difference. First operand 36 states and 41 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) [2024-11-09 04:56:22,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:56:22,668 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2024-11-09 04:56:22,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:56:22,670 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 [2024-11-09 04:56:22,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:56:22,671 INFO L225 Difference]: With dead ends: 35 [2024-11-09 04:56:22,671 INFO L226 Difference]: Without dead ends: 35 [2024-11-09 04:56:22,672 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:56:22,673 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:22,674 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 57 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:56:22,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-09 04:56:22,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-09 04:56:22,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:22,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2024-11-09 04:56:22,679 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 7 [2024-11-09 04:56:22,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:56:22,679 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2024-11-09 04:56:22,680 INFO L472 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) [2024-11-09 04:56:22,680 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2024-11-09 04:56:22,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 04:56:22,680 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:22,681 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:56:22,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-11-09 04:56:22,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:22,882 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:56:22,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:22,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1805028875, now seen corresponding path program 1 times [2024-11-09 04:56:22,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:56:22,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [748836071] [2024-11-09 04:56:22,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:22,888 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:22,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:56:22,892 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:56:22,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-11-09 04:56:22,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:22,999 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 04:56:23,001 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:23,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-11-09 04:56:23,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2024-11-09 04:56:23,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:23,134 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:56:23,135 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:56:23,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [748836071] [2024-11-09 04:56:23,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [748836071] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:56:23,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:56:23,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:56:23,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885433903] [2024-11-09 04:56:23,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:56:23,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:56:23,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:56:23,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:56:23,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:56:23,139 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:23,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:56:23,195 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2024-11-09 04:56:23,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:56:23,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 04:56:23,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:56:23,201 INFO L225 Difference]: With dead ends: 38 [2024-11-09 04:56:23,201 INFO L226 Difference]: Without dead ends: 38 [2024-11-09 04:56:23,201 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:56:23,205 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:23,206 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:56:23,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-09 04:56:23,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-11-09 04:56:23,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:23,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2024-11-09 04:56:23,218 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 7 [2024-11-09 04:56:23,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:56:23,218 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2024-11-09 04:56:23,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:23,219 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2024-11-09 04:56:23,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 04:56:23,219 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:23,219 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:56:23,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2024-11-09 04:56:23,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:23,420 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:56:23,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:23,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1805088457, now seen corresponding path program 1 times [2024-11-09 04:56:23,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:56:23,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2110533212] [2024-11-09 04:56:23,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:23,430 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:23,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:56:23,433 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:56:23,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-11-09 04:56:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:23,542 INFO L255 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 04:56:23,547 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:23,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-11-09 04:56:23,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2024-11-09 04:56:23,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:23,644 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:56:23,645 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:56:23,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2110533212] [2024-11-09 04:56:23,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2110533212] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:56:23,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:56:23,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:56:23,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356719063] [2024-11-09 04:56:23,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:56:23,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:56:23,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:56:23,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:56:23,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:56:23,647 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:23,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:56:23,846 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2024-11-09 04:56:23,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:56:23,847 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 04:56:23,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:56:23,848 INFO L225 Difference]: With dead ends: 37 [2024-11-09 04:56:23,848 INFO L226 Difference]: Without dead ends: 37 [2024-11-09 04:56:23,849 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:56:23,850 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:23,850 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:56:23,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-09 04:56:23,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2024-11-09 04:56:23,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:23,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2024-11-09 04:56:23,865 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 7 [2024-11-09 04:56:23,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:56:23,866 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2024-11-09 04:56:23,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:23,866 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2024-11-09 04:56:23,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 04:56:23,866 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:23,867 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:56:23,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2024-11-09 04:56:24,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:24,068 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:56:24,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:24,068 INFO L85 PathProgramCache]: Analyzing trace with hash -534039922, now seen corresponding path program 1 times [2024-11-09 04:56:24,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:56:24,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580885346] [2024-11-09 04:56:24,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:24,069 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:24,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:56:24,070 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:56:24,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2024-11-09 04:56:24,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:24,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 04:56:24,193 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:24,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:24,243 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:56:24,244 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:56:24,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580885346] [2024-11-09 04:56:24,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580885346] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:56:24,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:56:24,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:56:24,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718295866] [2024-11-09 04:56:24,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:56:24,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:56:24,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:56:24,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:56:24,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:56:24,247 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:24,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:56:24,441 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2024-11-09 04:56:24,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:56:24,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-09 04:56:24,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:56:24,443 INFO L225 Difference]: With dead ends: 33 [2024-11-09 04:56:24,443 INFO L226 Difference]: Without dead ends: 33 [2024-11-09 04:56:24,443 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:56:24,444 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 21 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:24,444 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 42 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:56:24,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-09 04:56:24,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2024-11-09 04:56:24,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.608695652173913) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:24,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2024-11-09 04:56:24,449 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 9 [2024-11-09 04:56:24,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:56:24,449 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2024-11-09 04:56:24,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:24,450 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2024-11-09 04:56:24,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 04:56:24,450 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:24,450 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:56:24,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2024-11-09 04:56:24,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:24,654 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:56:24,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:24,655 INFO L85 PathProgramCache]: Analyzing trace with hash -534039921, now seen corresponding path program 1 times [2024-11-09 04:56:24,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:56:24,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1460756704] [2024-11-09 04:56:24,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:24,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:24,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:56:24,659 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:56:24,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-11-09 04:56:24,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:24,768 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 04:56:24,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:24,910 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:56:24,910 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:56:24,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1460756704] [2024-11-09 04:56:24,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1460756704] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:56:24,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:56:24,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:56:24,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049885484] [2024-11-09 04:56:24,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:56:24,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:56:24,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:56:24,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:56:24,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:56:24,915 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:25,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:56:25,337 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2024-11-09 04:56:25,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:56:25,338 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-09 04:56:25,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:56:25,339 INFO L225 Difference]: With dead ends: 57 [2024-11-09 04:56:25,339 INFO L226 Difference]: Without dead ends: 57 [2024-11-09 04:56:25,339 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:56:25,340 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 22 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:25,340 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 103 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:56:25,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-09 04:56:25,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 40. [2024-11-09 04:56:25,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 39 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:25,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2024-11-09 04:56:25,344 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 9 [2024-11-09 04:56:25,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:56:25,345 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2024-11-09 04:56:25,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:25,345 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2024-11-09 04:56:25,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 04:56:25,346 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:25,346 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:56:25,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2024-11-09 04:56:25,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:25,546 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:56:25,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:25,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1240967441, now seen corresponding path program 1 times [2024-11-09 04:56:25,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:56:25,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681007178] [2024-11-09 04:56:25,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:25,548 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:25,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:56:25,549 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:56:25,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2024-11-09 04:56:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:25,650 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 04:56:25,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:25,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:25,928 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:56:25,929 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:56:25,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681007178] [2024-11-09 04:56:25,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681007178] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:56:25,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:56:25,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:56:25,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146474671] [2024-11-09 04:56:25,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:56:25,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:56:25,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:56:25,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:56:25,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:56:25,932 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:26,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:56:26,406 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2024-11-09 04:56:26,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:56:26,407 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-09 04:56:26,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:56:26,408 INFO L225 Difference]: With dead ends: 60 [2024-11-09 04:56:26,408 INFO L226 Difference]: Without dead ends: 60 [2024-11-09 04:56:26,408 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:56:26,409 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 22 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:26,409 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 83 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:56:26,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-09 04:56:26,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 35. [2024-11-09 04:56:26,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:26,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2024-11-09 04:56:26,413 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 9 [2024-11-09 04:56:26,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:56:26,413 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2024-11-09 04:56:26,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:26,414 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2024-11-09 04:56:26,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 04:56:26,414 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:26,415 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:56:26,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2024-11-09 04:56:26,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:26,615 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:56:26,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:26,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1693144941, now seen corresponding path program 1 times [2024-11-09 04:56:26,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:56:26,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [761316326] [2024-11-09 04:56:26,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:26,617 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:26,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:56:26,621 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:56:26,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2024-11-09 04:56:26,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:26,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 04:56:26,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:26,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 04:56:26,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:56:26,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2024-11-09 04:56:26,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:26,802 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:56:26,802 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:56:26,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [761316326] [2024-11-09 04:56:26,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [761316326] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:56:26,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:56:26,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 04:56:26,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100148484] [2024-11-09 04:56:26,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:56:26,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:56:26,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:56:26,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:56:26,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:56:26,805 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:27,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:56:27,053 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2024-11-09 04:56:27,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:56:27,054 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-09 04:56:27,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:56:27,055 INFO L225 Difference]: With dead ends: 32 [2024-11-09 04:56:27,055 INFO L226 Difference]: Without dead ends: 32 [2024-11-09 04:56:27,055 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:56:27,056 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 29 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:27,056 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 49 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:56:27,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-09 04:56:27,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-09 04:56:27,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 31 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:27,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2024-11-09 04:56:27,060 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 13 [2024-11-09 04:56:27,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:56:27,060 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2024-11-09 04:56:27,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:27,061 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2024-11-09 04:56:27,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 04:56:27,061 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:27,062 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:56:27,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2024-11-09 04:56:27,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:27,263 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:56:27,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:27,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1693144940, now seen corresponding path program 1 times [2024-11-09 04:56:27,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:56:27,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1568203190] [2024-11-09 04:56:27,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:27,264 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:27,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:56:27,265 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:56:27,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2024-11-09 04:56:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:27,366 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 04:56:27,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:27,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2024-11-09 04:56:27,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2024-11-09 04:56:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:27,567 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:56:27,568 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:56:27,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1568203190] [2024-11-09 04:56:27,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1568203190] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:56:27,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:56:27,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:56:27,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935483855] [2024-11-09 04:56:27,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:56:27,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:56:27,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:56:27,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:56:27,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:56:27,571 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:28,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:56:28,104 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2024-11-09 04:56:28,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 04:56:28,106 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-09 04:56:28,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:56:28,106 INFO L225 Difference]: With dead ends: 65 [2024-11-09 04:56:28,107 INFO L226 Difference]: Without dead ends: 65 [2024-11-09 04:56:28,107 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-09 04:56:28,108 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:28,108 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 97 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 04:56:28,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-09 04:56:28,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2024-11-09 04:56:28,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 57 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:28,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2024-11-09 04:56:28,123 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 13 [2024-11-09 04:56:28,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:56:28,123 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2024-11-09 04:56:28,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:28,124 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2024-11-09 04:56:28,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 04:56:28,124 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:28,125 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:56:28,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2024-11-09 04:56:28,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:28,325 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:56:28,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:28,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1693164838, now seen corresponding path program 1 times [2024-11-09 04:56:28,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:56:28,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335657414] [2024-11-09 04:56:28,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:28,326 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:28,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:56:28,329 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:56:28,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2024-11-09 04:56:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:28,477 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 04:56:28,480 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:28,852 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_#t~malloc13#1.base_6| (_ BitVec 64)) (|v_ULTIMATE.start_main_#t~malloc12#1.base_6| (_ BitVec 64)) (v_DerPreprocessor_1 (_ BitVec 1)) (v_DerPreprocessor_2 (_ BitVec 1))) (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_#t~malloc12#1.base_6|)) (= (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_#t~malloc12#1.base_6| (_ bv0 1)) |v_ULTIMATE.start_main_#t~malloc13#1.base_6| (_ bv0 1)) |c_#valid|) (= (_ bv0 1) (bvadd v_DerPreprocessor_1 (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_#t~malloc12#1.base_6| v_DerPreprocessor_1) |v_ULTIMATE.start_main_#t~malloc13#1.base_6| v_DerPreprocessor_2) |v_ULTIMATE.start_main_#t~malloc12#1.base_6|))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_#t~malloc13#1.base_6|)))) is different from true [2024-11-09 04:56:28,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:28,853 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:56:28,854 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:56:28,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335657414] [2024-11-09 04:56:28,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335657414] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:56:28,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:56:28,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:56:28,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114866352] [2024-11-09 04:56:28,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:56:28,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:56:28,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:56:28,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:56:28,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=12, Unknown=1, NotChecked=6, Total=30 [2024-11-09 04:56:28,858 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:29,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:56:29,140 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2024-11-09 04:56:29,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:56:29,143 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-09 04:56:29,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:56:29,144 INFO L225 Difference]: With dead ends: 57 [2024-11-09 04:56:29,144 INFO L226 Difference]: Without dead ends: 54 [2024-11-09 04:56:29,144 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=19, Unknown=1, NotChecked=8, Total=42 [2024-11-09 04:56:29,145 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:29,145 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 46 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2024-11-09 04:56:29,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-09 04:56:29,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-09 04:56:29,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 53 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:29,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2024-11-09 04:56:29,150 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 13 [2024-11-09 04:56:29,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:56:29,151 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2024-11-09 04:56:29,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:29,151 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2024-11-09 04:56:29,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 04:56:29,152 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:29,152 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:56:29,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2024-11-09 04:56:29,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:29,356 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:56:29,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:29,357 INFO L85 PathProgramCache]: Analyzing trace with hash -2086171950, now seen corresponding path program 1 times [2024-11-09 04:56:29,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:56:29,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1838470515] [2024-11-09 04:56:29,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:29,357 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:29,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:56:29,359 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:56:29,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2024-11-09 04:56:29,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:29,470 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 04:56:29,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:29,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2024-11-09 04:56:29,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-11-09 04:56:29,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:29,770 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:56:29,770 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:56:29,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1838470515] [2024-11-09 04:56:29,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1838470515] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:56:29,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:56:29,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:56:29,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761068564] [2024-11-09 04:56:29,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:56:29,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:56:29,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:56:29,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:56:29,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:56:29,774 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:30,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:56:30,161 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2024-11-09 04:56:30,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 04:56:30,162 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-09 04:56:30,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:56:30,163 INFO L225 Difference]: With dead ends: 61 [2024-11-09 04:56:30,163 INFO L226 Difference]: Without dead ends: 61 [2024-11-09 04:56:30,163 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-09 04:56:30,164 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:30,164 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 53 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:56:30,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-09 04:56:30,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 35. [2024-11-09 04:56:30,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:30,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2024-11-09 04:56:30,168 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 13 [2024-11-09 04:56:30,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:56:30,168 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2024-11-09 04:56:30,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:30,169 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2024-11-09 04:56:30,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-09 04:56:30,169 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:30,170 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:56:30,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2024-11-09 04:56:30,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:30,370 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:56:30,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:30,371 INFO L85 PathProgramCache]: Analyzing trace with hash 949935659, now seen corresponding path program 1 times [2024-11-09 04:56:30,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:56:30,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [567750226] [2024-11-09 04:56:30,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:30,371 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:30,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:56:30,374 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:56:30,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2024-11-09 04:56:30,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:30,495 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 04:56:30,496 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:30,507 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:56:30,507 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:56:30,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [567750226] [2024-11-09 04:56:30,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [567750226] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:56:30,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:56:30,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:56:30,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124017134] [2024-11-09 04:56:30,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:56:30,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:56:30,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:56:30,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:56:30,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:56:30,509 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:30,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:56:30,525 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2024-11-09 04:56:30,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:56:30,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 17 [2024-11-09 04:56:30,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:56:30,526 INFO L225 Difference]: With dead ends: 37 [2024-11-09 04:56:30,526 INFO L226 Difference]: Without dead ends: 37 [2024-11-09 04:56:30,527 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:56:30,527 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:30,528 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:56:30,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-09 04:56:30,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-11-09 04:56:30,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.34375) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:30,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2024-11-09 04:56:30,532 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 17 [2024-11-09 04:56:30,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:56:30,532 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2024-11-09 04:56:30,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:30,533 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2024-11-09 04:56:30,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 04:56:30,533 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:30,534 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:56:30,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2024-11-09 04:56:30,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:30,734 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:56:30,735 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:30,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1939903913, now seen corresponding path program 1 times [2024-11-09 04:56:30,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:56:30,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [991228663] [2024-11-09 04:56:30,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:30,735 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:30,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:56:30,737 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:56:30,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2024-11-09 04:56:30,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:30,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 04:56:30,856 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:31,335 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-11-09 04:56:31,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 30 [2024-11-09 04:56:31,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:31,427 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:56:31,427 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:56:31,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [991228663] [2024-11-09 04:56:31,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [991228663] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:56:31,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:56:31,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-09 04:56:31,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714696165] [2024-11-09 04:56:31,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:56:31,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 04:56:31,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:56:31,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 04:56:31,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-09 04:56:31,431 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:32,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:56:32,527 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2024-11-09 04:56:32,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 04:56:32,529 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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 [2024-11-09 04:56:32,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:56:32,529 INFO L225 Difference]: With dead ends: 40 [2024-11-09 04:56:32,530 INFO L226 Difference]: Without dead ends: 37 [2024-11-09 04:56:32,530 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2024-11-09 04:56:32,531 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:32,531 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 82 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 04:56:32,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-09 04:56:32,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-11-09 04:56:32,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.3125) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:32,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2024-11-09 04:56:32,535 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 19 [2024-11-09 04:56:32,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:56:32,535 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2024-11-09 04:56:32,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:32,536 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2024-11-09 04:56:32,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 04:56:32,536 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:32,536 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:56:32,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2024-11-09 04:56:32,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:32,741 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:56:32,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:32,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1945725016, now seen corresponding path program 1 times [2024-11-09 04:56:32,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:56:32,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725294497] [2024-11-09 04:56:32,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:32,744 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:32,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:56:32,747 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:56:32,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2024-11-09 04:56:32,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:32,901 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 04:56:32,904 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:32,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 04:56:33,079 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:56:33,082 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:56:33,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 12 [2024-11-09 04:56:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:33,122 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:56:33,123 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:56:33,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725294497] [2024-11-09 04:56:33,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1725294497] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:56:33,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:56:33,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 04:56:33,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303617710] [2024-11-09 04:56:33,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:56:33,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 04:56:33,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:56:33,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 04:56:33,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-09 04:56:33,125 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:33,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:56:33,534 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2024-11-09 04:56:33,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 04:56:33,536 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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 [2024-11-09 04:56:33,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:56:33,536 INFO L225 Difference]: With dead ends: 48 [2024-11-09 04:56:33,536 INFO L226 Difference]: Without dead ends: 37 [2024-11-09 04:56:33,537 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-09 04:56:33,538 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:33,538 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 125 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:56:33,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-09 04:56:33,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-11-09 04:56:33,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.28125) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:33,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2024-11-09 04:56:33,544 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 19 [2024-11-09 04:56:33,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:56:33,544 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2024-11-09 04:56:33,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:33,545 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2024-11-09 04:56:33,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 04:56:33,548 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:33,548 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:56:33,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2024-11-09 04:56:33,752 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:33,752 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:56:33,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:33,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1328173926, now seen corresponding path program 1 times [2024-11-09 04:56:33,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:56:33,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [178327957] [2024-11-09 04:56:33,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:33,753 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:33,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:56:33,755 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:56:33,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2024-11-09 04:56:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:33,909 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 04:56:33,914 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:33,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-11-09 04:56:33,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2024-11-09 04:56:34,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 04:56:34,287 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:56:34,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2024-11-09 04:56:35,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:35,053 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:56:36,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-09 04:56:36,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2024-11-09 04:56:37,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:37,428 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:56:37,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [178327957] [2024-11-09 04:56:37,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [178327957] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:56:37,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [796740707] [2024-11-09 04:56:37,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:37,429 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 04:56:37,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 04:56:37,432 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 04:56:37,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2024-11-09 04:56:37,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:37,701 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-09 04:56:37,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:37,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2024-11-09 04:56:37,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2024-11-09 04:56:37,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 04:56:38,958 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-11-09 04:56:38,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2024-11-09 04:56:39,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:39,030 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:56:39,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-09 04:56:39,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2024-11-09 04:56:40,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:40,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [796740707] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:56:40,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449545264] [2024-11-09 04:56:40,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:40,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:56:40,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:56:40,320 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:56:40,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 04:56:40,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:40,418 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 04:56:40,421 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:40,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-11-09 04:56:40,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2024-11-09 04:56:40,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 04:56:40,667 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:56:40,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2024-11-09 04:56:40,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:40,952 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:56:41,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-09 04:56:41,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2024-11-09 04:56:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:42,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449545264] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:56:42,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 04:56:42,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11, 9, 10, 9] total 23 [2024-11-09 04:56:42,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130549679] [2024-11-09 04:56:42,029 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 04:56:42,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 04:56:42,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:56:42,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 04:56:42,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2024-11-09 04:56:42,031 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:45,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:56:45,817 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2024-11-09 04:56:45,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 04:56:45,819 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 24 states have internal predecessors, (43), 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 [2024-11-09 04:56:45,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:56:45,819 INFO L225 Difference]: With dead ends: 45 [2024-11-09 04:56:45,819 INFO L226 Difference]: Without dead ends: 41 [2024-11-09 04:56:45,820 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 04:56:45,820 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:45,821 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 112 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-09 04:56:45,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-09 04:56:45,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2024-11-09 04:56:45,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:45,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2024-11-09 04:56:45,824 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 19 [2024-11-09 04:56:45,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:56:45,824 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2024-11-09 04:56:45,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:45,825 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2024-11-09 04:56:45,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-09 04:56:45,825 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:45,825 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:56:45,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2024-11-09 04:56:46,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-09 04:56:46,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2024-11-09 04:56:46,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:46,429 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:56:46,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:46,430 INFO L85 PathProgramCache]: Analyzing trace with hash 769817810, now seen corresponding path program 1 times [2024-11-09 04:56:46,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:56:46,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [329372878] [2024-11-09 04:56:46,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:46,430 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:46,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:56:46,432 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:56:46,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2024-11-09 04:56:46,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:46,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 04:56:46,575 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:46,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 04:56:46,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 04:56:46,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-09 04:56:46,752 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:56:46,756 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:56:46,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 12 [2024-11-09 04:56:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:46,776 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 04:56:46,777 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:56:46,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [329372878] [2024-11-09 04:56:46,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [329372878] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:56:46,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:56:46,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 04:56:46,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226976054] [2024-11-09 04:56:46,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:56:46,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 04:56:46,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:56:46,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 04:56:46,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-09 04:56:46,779 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:46,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:56:46,982 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2024-11-09 04:56:46,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 04:56:46,983 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-09 04:56:46,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:56:46,983 INFO L225 Difference]: With dead ends: 46 [2024-11-09 04:56:46,984 INFO L226 Difference]: Without dead ends: 39 [2024-11-09 04:56:46,984 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-09 04:56:46,984 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:46,985 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 85 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:56:46,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-09 04:56:46,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-09 04:56:46,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:46,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2024-11-09 04:56:46,988 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 21 [2024-11-09 04:56:46,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:56:46,988 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2024-11-09 04:56:46,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:46,988 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2024-11-09 04:56:46,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-09 04:56:46,989 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:46,989 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:56:46,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2024-11-09 04:56:47,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:47,190 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:56:47,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:47,191 INFO L85 PathProgramCache]: Analyzing trace with hash -919125932, now seen corresponding path program 1 times [2024-11-09 04:56:47,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:56:47,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2037708318] [2024-11-09 04:56:47,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:47,191 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:56:47,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:56:47,196 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:56:47,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2024-11-09 04:56:47,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:47,343 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 04:56:47,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:47,399 INFO L349 Elim1Store]: treesize reduction 13, result has 43.5 percent of original size [2024-11-09 04:56:47,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 10 [2024-11-09 04:56:47,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 04:56:47,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 04:56:47,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-09 04:56:47,717 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:56:47,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2024-11-09 04:56:48,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:48,639 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:56:49,809 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:56:49,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2024-11-09 04:56:49,909 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:56:49,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 38 [2024-11-09 04:56:50,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-09 04:56:50,372 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:56:50,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 04:56:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:50,569 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:56:50,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2037708318] [2024-11-09 04:56:50,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2037708318] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:56:50,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [267802748] [2024-11-09 04:56:50,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:50,570 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 04:56:50,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 04:56:50,574 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 04:56:50,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2024-11-09 04:56:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:50,832 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 04:56:50,835 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:50,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 04:56:50,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 04:56:51,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-09 04:56:52,189 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-11-09 04:56:52,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2024-11-09 04:56:52,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:52,966 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:56:53,655 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:56:53,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2024-11-09 04:56:53,765 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:56:53,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 38 [2024-11-09 04:56:53,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2024-11-09 04:56:54,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-09 04:56:55,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:55,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [267802748] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:56:55,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785117424] [2024-11-09 04:56:55,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:55,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:56:55,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:56:55,359 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:56:55,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-09 04:56:55,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:55,457 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 04:56:55,461 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:55,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 04:56:55,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 04:56:55,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-09 04:56:55,841 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:56:55,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2024-11-09 04:56:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:57,682 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:56:58,219 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:56:58,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2024-11-09 04:56:58,310 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:56:58,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 38 [2024-11-09 04:56:58,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-09 04:56:58,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2024-11-09 04:56:58,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:56:58,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785117424] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:56:58,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 04:56:58,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 8, 8, 8] total 27 [2024-11-09 04:56:58,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056668377] [2024-11-09 04:56:58,751 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 04:56:58,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 04:56:58,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:56:58,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 04:56:58,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=640, Unknown=2, NotChecked=0, Total=756 [2024-11-09 04:56:58,753 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 28 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 28 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) [2024-11-09 04:57:01,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:57:01,773 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2024-11-09 04:57:01,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 04:57:01,775 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 28 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) Word has length 21 [2024-11-09 04:57:01,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:57:01,776 INFO L225 Difference]: With dead ends: 88 [2024-11-09 04:57:01,776 INFO L226 Difference]: Without dead ends: 88 [2024-11-09 04:57:01,777 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=161, Invalid=893, Unknown=2, NotChecked=0, Total=1056 [2024-11-09 04:57:01,777 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 70 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:57:01,778 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 179 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-09 04:57:01,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-09 04:57:01,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2024-11-09 04:57:01,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 84 states have (on average 1.1547619047619047) internal successors, (97), 85 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:57:01,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 97 transitions. [2024-11-09 04:57:01,783 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 97 transitions. Word has length 21 [2024-11-09 04:57:01,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:57:01,783 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 97 transitions. [2024-11-09 04:57:01,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 28 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) [2024-11-09 04:57:01,784 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 97 transitions. [2024-11-09 04:57:01,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-09 04:57:01,784 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:57:01,785 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:57:01,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2024-11-09 04:57:01,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2024-11-09 04:57:02,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-09 04:57:02,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:57:02,386 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:57:02,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:57:02,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1870155632, now seen corresponding path program 1 times [2024-11-09 04:57:02,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:57:02,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1635925323] [2024-11-09 04:57:02,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:57:02,388 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:57:02,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:57:02,391 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:57:02,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2024-11-09 04:57:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:57:02,561 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-09 04:57:02,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:57:02,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-11-09 04:57:02,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2024-11-09 04:57:02,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 04:57:03,391 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:57:03,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2024-11-09 04:57:04,301 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:57:04,301 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:57:09,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2024-11-09 04:57:09,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2024-11-09 04:57:09,818 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:57:09,818 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:57:09,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1635925323] [2024-11-09 04:57:09,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1635925323] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:57:09,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [585831474] [2024-11-09 04:57:09,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:57:09,819 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 04:57:09,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 04:57:09,823 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 04:57:09,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2024-11-09 04:57:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:57:10,063 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-09 04:57:10,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:57:10,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2024-11-09 04:57:10,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2024-11-09 04:57:10,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 04:57:11,932 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-11-09 04:57:11,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2024-11-09 04:57:12,018 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:57:12,019 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:57:15,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2024-11-09 04:57:15,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2024-11-09 04:57:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:57:17,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [585831474] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:57:17,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811782429] [2024-11-09 04:57:17,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:57:17,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:57:17,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:57:17,156 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:57:17,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-09 04:57:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:57:17,296 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-09 04:57:17,299 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:57:17,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2024-11-09 04:57:17,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2024-11-09 04:57:17,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 04:57:17,828 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:57:17,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2024-11-09 04:57:18,131 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:57:18,131 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:57:21,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2024-11-09 04:57:21,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2024-11-09 04:57:21,434 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:57:21,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811782429] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:57:21,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 04:57:21,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 14, 13, 13, 11] total 34 [2024-11-09 04:57:21,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265358911] [2024-11-09 04:57:21,435 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 04:57:21,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-09 04:57:21,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:57:21,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-09 04:57:21,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 04:57:21,437 INFO L87 Difference]: Start difference. First operand 86 states and 97 transitions. Second operand has 35 states, 34 states have (on average 2.411764705882353) internal successors, (82), 35 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:57:35,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:57:35,638 INFO L93 Difference]: Finished difference Result 176 states and 199 transitions. [2024-11-09 04:57:35,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-09 04:57:35,640 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.411764705882353) internal successors, (82), 35 states have internal predecessors, (82), 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 31 [2024-11-09 04:57:35,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:57:35,642 INFO L225 Difference]: With dead ends: 176 [2024-11-09 04:57:35,642 INFO L226 Difference]: Without dead ends: 176 [2024-11-09 04:57:35,643 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 143 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=608, Invalid=2932, Unknown=0, NotChecked=0, Total=3540 [2024-11-09 04:57:35,643 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 212 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:57:35,644 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 167 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2024-11-09 04:57:35,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-11-09 04:57:35,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 158. [2024-11-09 04:57:35,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 156 states have (on average 1.1602564102564104) internal successors, (181), 157 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:57:35,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 181 transitions. [2024-11-09 04:57:35,652 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 181 transitions. Word has length 31 [2024-11-09 04:57:35,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:57:35,653 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 181 transitions. [2024-11-09 04:57:35,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.411764705882353) internal successors, (82), 35 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:57:35,653 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 181 transitions. [2024-11-09 04:57:35,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 04:57:35,654 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:57:35,655 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:57:35,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-09 04:57:35,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2024-11-09 04:57:36,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2024-11-09 04:57:36,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:57:36,260 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:57:36,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:57:36,260 INFO L85 PathProgramCache]: Analyzing trace with hash 350793182, now seen corresponding path program 2 times [2024-11-09 04:57:36,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:57:36,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520538440] [2024-11-09 04:57:36,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 04:57:36,261 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:57:36,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:57:36,262 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:57:36,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2024-11-09 04:57:36,446 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 04:57:36,446 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:57:36,452 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 04:57:36,456 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:57:36,503 INFO L349 Elim1Store]: treesize reduction 13, result has 43.5 percent of original size [2024-11-09 04:57:36,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 10 [2024-11-09 04:57:36,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 04:57:36,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 04:57:36,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-09 04:57:37,546 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:57:37,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2024-11-09 04:57:38,973 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:57:38,974 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:57:44,601 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:57:44,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2024-11-09 04:57:44,662 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:57:44,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 40 [2024-11-09 04:57:44,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2024-11-09 04:57:45,360 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:57:45,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:57:45,374 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:57:45,374 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:57:45,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1520538440] [2024-11-09 04:57:45,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1520538440] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:57:45,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [576442422] [2024-11-09 04:57:45,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 04:57:45,375 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 04:57:45,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 04:57:45,376 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 04:57:45,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2024-11-09 04:57:45,705 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 04:57:45,705 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:57:45,708 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-09 04:57:45,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:57:45,763 INFO L349 Elim1Store]: treesize reduction 13, result has 43.5 percent of original size [2024-11-09 04:57:45,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 10 [2024-11-09 04:57:45,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 04:57:45,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 04:57:45,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-09 04:57:47,146 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-11-09 04:57:47,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2024-11-09 04:57:47,409 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:57:47,409 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:57:50,656 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:57:50,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2024-11-09 04:57:50,716 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:57:50,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 40 [2024-11-09 04:57:50,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2024-11-09 04:57:51,697 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:57:51,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:57:51,706 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:57:51,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [576442422] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:57:51,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238247480] [2024-11-09 04:57:51,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 04:57:51,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:57:51,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:57:51,708 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:57:51,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-09 04:57:51,857 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 04:57:51,857 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:57:51,863 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 04:57:51,866 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:57:51,903 INFO L349 Elim1Store]: treesize reduction 13, result has 43.5 percent of original size [2024-11-09 04:57:51,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 10 [2024-11-09 04:57:51,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 04:57:52,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 04:57:52,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-11-09 04:57:54,077 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:57:54,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2024-11-09 04:57:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:57:55,651 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:57:59,524 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:57:59,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2024-11-09 04:57:59,600 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:57:59,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 40 [2024-11-09 04:57:59,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2024-11-09 04:57:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:57:59,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238247480] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:57:59,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 04:57:59,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13, 12, 10, 10] total 40 [2024-11-09 04:57:59,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134101864] [2024-11-09 04:57:59,729 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 04:57:59,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-09 04:57:59,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:57:59,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-09 04:57:59,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1430, Unknown=5, NotChecked=0, Total=1640 [2024-11-09 04:57:59,732 INFO L87 Difference]: Start difference. First operand 158 states and 181 transitions. Second operand has 41 states, 40 states have (on average 3.975) internal successors, (159), 41 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:58:09,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:58:09,718 INFO L93 Difference]: Finished difference Result 360 states and 409 transitions. [2024-11-09 04:58:09,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 04:58:09,720 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.975) internal successors, (159), 41 states have internal predecessors, (159), 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 45 [2024-11-09 04:58:09,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:58:09,722 INFO L225 Difference]: With dead ends: 360 [2024-11-09 04:58:09,722 INFO L226 Difference]: Without dead ends: 360 [2024-11-09 04:58:09,723 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 223 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=457, Invalid=2730, Unknown=5, NotChecked=0, Total=3192 [2024-11-09 04:58:09,724 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 136 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:58:09,724 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 480 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2024-11-09 04:58:09,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2024-11-09 04:58:09,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 354. [2024-11-09 04:58:09,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 352 states have (on average 1.1619318181818181) internal successors, (409), 353 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:58:09,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 409 transitions. [2024-11-09 04:58:09,739 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 409 transitions. Word has length 45 [2024-11-09 04:58:09,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:58:09,740 INFO L471 AbstractCegarLoop]: Abstraction has 354 states and 409 transitions. [2024-11-09 04:58:09,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.975) internal successors, (159), 41 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:58:09,741 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 409 transitions. [2024-11-09 04:58:09,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-09 04:58:09,746 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:58:09,747 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:58:09,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2024-11-09 04:58:09,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2024-11-09 04:58:10,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-09 04:58:10,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:58:10,348 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-09 04:58:10,348 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:58:10,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1940094688, now seen corresponding path program 2 times [2024-11-09 04:58:10,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2024-11-09 04:58:10,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1868905798] [2024-11-09 04:58:10,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 04:58:10,349 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-11-09 04:58:10,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat [2024-11-09 04:58:10,350 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-11-09 04:58:10,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2024-11-09 04:58:10,574 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 04:58:10,574 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:58:10,581 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-09 04:58:10,586 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:58:10,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-11-09 04:58:10,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2024-11-09 04:58:10,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 04:58:12,335 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:58:12,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2024-11-09 04:58:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:58:13,881 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:58:24,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2024-11-09 04:58:24,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2024-11-09 04:58:25,415 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:58:25,415 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2024-11-09 04:58:25,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1868905798] [2024-11-09 04:58:25,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1868905798] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:58:25,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1881078556] [2024-11-09 04:58:25,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 04:58:25,416 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 04:58:25,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/cvc4 [2024-11-09 04:58:25,417 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 04:58:25,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2024-11-09 04:58:25,864 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 04:58:25,864 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:58:25,868 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-09 04:58:25,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:58:25,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2024-11-09 04:58:25,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2024-11-09 04:58:26,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 04:58:28,655 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-11-09 04:58:28,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2024-11-09 04:58:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:58:28,720 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:58:32,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2024-11-09 04:58:32,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2024-11-09 04:58:34,499 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:58:34,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1881078556] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:58:34,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699042800] [2024-11-09 04:58:34,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 04:58:34,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:58:34,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:58:34,502 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:58:34,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_599df6e7-1aed-4a32-9487-5dd58b3989e6/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-09 04:58:34,666 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 04:58:34,666 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:58:34,672 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-09 04:58:34,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:58:34,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2024-11-09 04:58:34,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2024-11-09 04:58:34,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 04:58:36,007 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:58:36,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2024-11-09 04:58:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:58:37,138 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:58:49,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2024-11-09 04:58:49,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2024-11-09 04:58:51,513 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:58:51,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699042800] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:58:51,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2024-11-09 04:58:51,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 19, 18, 17, 15] total 55 [2024-11-09 04:58:51,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107266076] [2024-11-09 04:58:51,514 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2024-11-09 04:58:51,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-09 04:58:51,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2024-11-09 04:58:51,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-09 04:58:51,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=2697, Unknown=0, NotChecked=0, Total=3080 [2024-11-09 04:58:51,517 INFO L87 Difference]: Start difference. First operand 354 states and 409 transitions. Second operand has 56 states, 55 states have (on average 3.309090909090909) internal successors, (182), 56 states have internal predecessors, (182), 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)