./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/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_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/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 32bit --witnessprinter.graph.data.programhash 382beab9cdcef42f6594628efe520684fdbc8c72ada26cb53ddf4918b8957d49 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 06:20:16,048 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 06:20:16,119 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-09 06:20:16,127 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 06:20:16,129 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 06:20:16,182 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 06:20:16,184 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 06:20:16,185 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 06:20:16,186 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 06:20:16,188 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 06:20:16,189 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 06:20:16,189 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 06:20:16,190 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 06:20:16,191 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 06:20:16,193 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 06:20:16,194 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 06:20:16,194 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 06:20:16,195 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 06:20:16,195 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 06:20:16,195 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 06:20:16,196 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 06:20:16,201 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 06:20:16,201 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 06:20:16,202 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 06:20:16,202 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 06:20:16,202 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 06:20:16,216 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 06:20:16,216 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 06:20:16,216 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 06:20:16,217 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 06:20:16,217 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 06:20:16,217 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 06:20:16,217 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 06:20:16,218 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 06:20:16,218 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 06:20:16,218 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 06:20:16,219 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 06:20:16,219 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 06:20:16,220 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 06:20:16,221 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 06:20:16,221 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 06:20:16,221 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:20:16,222 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 06:20:16,222 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 06:20:16,223 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 06:20:16,223 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 06:20:16,223 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 06:20:16,224 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 06:20:16,224 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 06:20:16,224 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_49cfc5b7-a5f7-45a2-ab8d-627853735aea/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 382beab9cdcef42f6594628efe520684fdbc8c72ada26cb53ddf4918b8957d49 [2024-11-09 06:20:16,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 06:20:16,637 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 06:20:16,640 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 06:20:16,642 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 06:20:16,643 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 06:20:16,644 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i Unable to find full path for "g++" [2024-11-09 06:20:18,993 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 06:20:19,259 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 06:20:19,260 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i [2024-11-09 06:20:19,278 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/data/ecc047d44/6868c96d5031472f8d8c42db8f560cee/FLAGbbd65d5e9 [2024-11-09 06:20:19,582 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/data/ecc047d44/6868c96d5031472f8d8c42db8f560cee [2024-11-09 06:20:19,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 06:20:19,588 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 06:20:19,589 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 06:20:19,590 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 06:20:19,598 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 06:20:19,602 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:20:19" (1/1) ... [2024-11-09 06:20:19,604 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c30c9ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:20:19, skipping insertion in model container [2024-11-09 06:20:19,604 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:20:19" (1/1) ... [2024-11-09 06:20:19,663 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 06:20:20,189 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 06:20:20,190 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 06:20:20,197 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:20:20,217 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 06:20:20,294 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:20:20,334 INFO L204 MainTranslator]: Completed translation [2024-11-09 06:20:20,335 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:20:20 WrapperNode [2024-11-09 06:20:20,336 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 06:20:20,337 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 06:20:20,337 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 06:20:20,337 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 06:20:20,346 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:20:20" (1/1) ... [2024-11-09 06:20:20,359 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:20:20" (1/1) ... [2024-11-09 06:20:20,388 INFO L138 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 95 [2024-11-09 06:20:20,388 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 06:20:20,389 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 06:20:20,389 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 06:20:20,389 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 06:20:20,400 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:20:20" (1/1) ... [2024-11-09 06:20:20,400 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:20:20" (1/1) ... [2024-11-09 06:20:20,403 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:20:20" (1/1) ... [2024-11-09 06:20:20,404 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:20:20" (1/1) ... [2024-11-09 06:20:20,410 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:20:20" (1/1) ... [2024-11-09 06:20:20,413 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:20:20" (1/1) ... [2024-11-09 06:20:20,415 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:20:20" (1/1) ... [2024-11-09 06:20:20,416 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:20:20" (1/1) ... [2024-11-09 06:20:20,419 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 06:20:20,420 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 06:20:20,420 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 06:20:20,420 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 06:20:20,421 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:20:20" (1/1) ... [2024-11-09 06:20:20,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:20:20,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:20:20,462 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 06:20:20,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 06:20:20,523 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 06:20:20,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 06:20:20,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 06:20:20,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 06:20:20,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 06:20:20,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 06:20:20,721 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 06:20:20,723 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 06:20:21,076 INFO L? ?]: Removed 64 outVars from TransFormulas that were not future-live. [2024-11-09 06:20:21,077 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 06:20:21,177 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 06:20:21,178 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 06:20:21,178 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:20:21 BoogieIcfgContainer [2024-11-09 06:20:21,178 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 06:20:21,182 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 06:20:21,182 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 06:20:21,186 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 06:20:21,187 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 06:20:19" (1/3) ... [2024-11-09 06:20:21,188 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e610b73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:20:21, skipping insertion in model container [2024-11-09 06:20:21,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:20:20" (2/3) ... [2024-11-09 06:20:21,189 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e610b73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:20:21, skipping insertion in model container [2024-11-09 06:20:21,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:20:21" (3/3) ... [2024-11-09 06:20:21,190 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrcmp-alloca-2.i [2024-11-09 06:20:21,214 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 06:20:21,215 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2024-11-09 06:20:21,278 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 06:20:21,287 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;@5a2ff41f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 06:20:21,287 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-09 06:20:21,292 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 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 06:20:21,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-09 06:20:21,303 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:20:21,304 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-09 06:20:21,305 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:20:21,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:20:21,315 INFO L85 PathProgramCache]: Analyzing trace with hash 4308933, now seen corresponding path program 1 times [2024-11-09 06:20:21,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:20:21,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775197949] [2024-11-09 06:20:21,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:20:21,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:20:21,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:20:21,846 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 06:20:21,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:20:21,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775197949] [2024-11-09 06:20:21,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775197949] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:20:21,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:20:21,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 06:20:21,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066510128] [2024-11-09 06:20:21,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:20:21,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:20:21,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:20:21,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:20:21,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:20:21,901 INFO L87 Difference]: Start difference. First operand has 39 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 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 2.0) internal successors, (4), 2 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 06:20:22,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:20:22,021 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2024-11-09 06:20:22,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:20:22,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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 06:20:22,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:20:22,035 INFO L225 Difference]: With dead ends: 37 [2024-11-09 06:20:22,036 INFO L226 Difference]: Without dead ends: 36 [2024-11-09 06:20:22,038 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 06:20:22,043 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 15 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:20:22,044 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 37 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:20:22,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-09 06:20:22,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-09 06:20:22,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 19 states have (on average 2.1578947368421053) 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 06:20:22,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2024-11-09 06:20:22,089 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 4 [2024-11-09 06:20:22,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:20:22,089 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2024-11-09 06:20:22,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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 06:20:22,090 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2024-11-09 06:20:22,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-09 06:20:22,091 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:20:22,091 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-09 06:20:22,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 06:20:22,092 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:20:22,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:20:22,093 INFO L85 PathProgramCache]: Analyzing trace with hash 4308934, now seen corresponding path program 1 times [2024-11-09 06:20:22,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:20:22,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213350153] [2024-11-09 06:20:22,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:20:22,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:20:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:20:22,715 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 06:20:22,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:20:22,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213350153] [2024-11-09 06:20:22,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213350153] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:20:22,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:20:22,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:20:22,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375793439] [2024-11-09 06:20:22,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:20:22,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:20:22,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:20:22,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:20:22,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:20:22,722 INFO L87 Difference]: Start difference. First operand 36 states and 41 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 06:20:22,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:20:22,917 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2024-11-09 06:20:22,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:20:22,918 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 06:20:22,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:20:22,921 INFO L225 Difference]: With dead ends: 39 [2024-11-09 06:20:22,922 INFO L226 Difference]: Without dead ends: 39 [2024-11-09 06:20:22,923 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:20:22,926 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:20:22,927 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 63 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:20:22,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-09 06:20:22,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-09 06:20:22,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 2.090909090909091) internal successors, (46), 38 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 06:20:22,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2024-11-09 06:20:22,934 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 4 [2024-11-09 06:20:22,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:20:22,935 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2024-11-09 06:20:22,935 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 06:20:22,935 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2024-11-09 06:20:22,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 06:20:22,936 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:20:22,936 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 06:20:22,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 06:20:22,937 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:20:22,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:20:22,938 INFO L85 PathProgramCache]: Analyzing trace with hash -143674700, now seen corresponding path program 1 times [2024-11-09 06:20:22,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:20:22,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241618399] [2024-11-09 06:20:22,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:20:22,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:20:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:20:23,026 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 06:20:23,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:20:23,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241618399] [2024-11-09 06:20:23,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241618399] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:20:23,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:20:23,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 06:20:23,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167280089] [2024-11-09 06:20:23,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:20:23,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:20:23,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:20:23,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:20:23,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:20:23,033 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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 06:20:23,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:20:23,105 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2024-11-09 06:20:23,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:20:23,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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 06:20:23,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:20:23,108 INFO L225 Difference]: With dead ends: 37 [2024-11-09 06:20:23,109 INFO L226 Difference]: Without dead ends: 37 [2024-11-09 06:20:23,110 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 06:20:23,113 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:20:23,116 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 37 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:20:23,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-09 06:20:23,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-11-09 06:20:23,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 2.0) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 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 06:20:23,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2024-11-09 06:20:23,127 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 6 [2024-11-09 06:20:23,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:20:23,128 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2024-11-09 06:20:23,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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 06:20:23,128 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2024-11-09 06:20:23,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 06:20:23,129 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:20:23,129 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 06:20:23,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 06:20:23,130 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:20:23,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:20:23,132 INFO L85 PathProgramCache]: Analyzing trace with hash -143674699, now seen corresponding path program 1 times [2024-11-09 06:20:23,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:20:23,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598838743] [2024-11-09 06:20:23,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:20:23,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:20:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:20:23,525 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 06:20:23,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:20:23,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598838743] [2024-11-09 06:20:23,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598838743] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:20:23,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:20:23,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 06:20:23,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36263600] [2024-11-09 06:20:23,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:20:23,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 06:20:23,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:20:23,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 06:20:23,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:20:23,528 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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 06:20:23,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:20:23,642 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2024-11-09 06:20:23,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 06:20:23,643 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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 06:20:23,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:20:23,644 INFO L225 Difference]: With dead ends: 40 [2024-11-09 06:20:23,644 INFO L226 Difference]: Without dead ends: 40 [2024-11-09 06:20:23,645 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:20:23,646 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:20:23,648 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 50 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:20:23,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-09 06:20:23,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-09 06:20:23,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.92) internal successors, (48), 39 states have internal predecessors, (48), 0 states have call successors, (0), 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 06:20:23,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-11-09 06:20:23,654 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 6 [2024-11-09 06:20:23,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:20:23,654 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-11-09 06:20:23,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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 06:20:23,655 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-11-09 06:20:23,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 06:20:23,655 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:20:23,655 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 06:20:23,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 06:20:23,656 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:20:23,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:20:23,657 INFO L85 PathProgramCache]: Analyzing trace with hash -143663872, now seen corresponding path program 1 times [2024-11-09 06:20:23,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:20:23,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424617190] [2024-11-09 06:20:23,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:20:23,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:20:23,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:20:23,854 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 06:20:23,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:20:23,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424617190] [2024-11-09 06:20:23,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424617190] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:20:23,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:20:23,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 06:20:23,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265006177] [2024-11-09 06:20:23,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:20:23,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:20:23,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:20:23,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:20:23,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:20:23,860 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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 06:20:23,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:20:23,927 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2024-11-09 06:20:23,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:20:23,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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 06:20:23,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:20:23,930 INFO L225 Difference]: With dead ends: 39 [2024-11-09 06:20:23,930 INFO L226 Difference]: Without dead ends: 39 [2024-11-09 06:20:23,930 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 06:20:23,932 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:20:23,936 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 33 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:20:23,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-09 06:20:23,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-09 06:20:23,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.88) internal successors, (47), 38 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 06:20:23,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2024-11-09 06:20:23,945 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 6 [2024-11-09 06:20:23,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:20:23,945 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2024-11-09 06:20:23,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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 06:20:23,946 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2024-11-09 06:20:23,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 06:20:23,949 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:20:23,949 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2024-11-09 06:20:23,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 06:20:23,949 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:20:23,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:20:23,950 INFO L85 PathProgramCache]: Analyzing trace with hash -479402104, now seen corresponding path program 1 times [2024-11-09 06:20:23,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:20:23,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555354419] [2024-11-09 06:20:23,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:20:23,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:20:23,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:20:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:20:24,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:20:24,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555354419] [2024-11-09 06:20:24,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555354419] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:20:24,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230525633] [2024-11-09 06:20:24,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:20:24,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:20:24,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:20:24,387 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:20:24,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 06:20:24,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:20:24,492 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 06:20:24,499 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:20:24,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 06:20:24,633 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 7 [2024-11-09 06:20:24,647 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 06:20:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:20:24,891 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:20:25,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:20:25,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230525633] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:20:25,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1820580638] [2024-11-09 06:20:25,169 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2024-11-09 06:20:25,169 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:20:25,174 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:20:25,181 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:20:25,181 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:20:26,213 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:20:26,563 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '495#(and (= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_35| Int) (|v_ULTIMATE.start_main_~nondetString1~0#1.base_29| Int)) (and (<= 2 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~i~0#1_35|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= (+ |v_ULTIMATE.start_main_~i~0#1_35| 2) |ULTIMATE.start_main_~length1~0#1|) (<= (select |#length| |v_ULTIMATE.start_main_~nondetString1~0#1.base_29|) |v_ULTIMATE.start_main_~i~0#1_35|) (<= 2 |v_ULTIMATE.start_main_~nondetString1~0#1.base_29|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))) (<= |ULTIMATE.start_main_#t~nondet14#1| 127) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet14#1|)))' at error location [2024-11-09 06:20:26,563 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:20:26,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:20:26,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-09 06:20:26,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249123573] [2024-11-09 06:20:26,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:20:26,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 06:20:26,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:20:26,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 06:20:26,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-11-09 06:20:26,566 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 06:20:26,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:20:26,897 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2024-11-09 06:20:26,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 06:20:26,898 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 06:20:26,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:20:26,899 INFO L225 Difference]: With dead ends: 39 [2024-11-09 06:20:26,899 INFO L226 Difference]: Without dead ends: 39 [2024-11-09 06:20:26,900 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2024-11-09 06:20:26,901 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:20:26,901 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 100 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:20:26,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-09 06:20:26,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2024-11-09 06:20:26,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 36 states have internal predecessors, (44), 0 states have call successors, (0), 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 06:20:26,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2024-11-09 06:20:26,906 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 7 [2024-11-09 06:20:26,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:20:26,907 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2024-11-09 06:20:26,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 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 06:20:26,907 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2024-11-09 06:20:26,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 06:20:26,908 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:20:26,908 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:20:26,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 06:20:27,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 06:20:27,115 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:20:27,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:20:27,116 INFO L85 PathProgramCache]: Analyzing trace with hash -158612743, now seen corresponding path program 1 times [2024-11-09 06:20:27,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:20:27,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844928945] [2024-11-09 06:20:27,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:20:27,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:20:27,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:20:27,420 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 06:20:27,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:20:27,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844928945] [2024-11-09 06:20:27,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844928945] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:20:27,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:20:27,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:20:27,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874482691] [2024-11-09 06:20:27,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:20:27,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:20:27,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:20:27,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:20:27,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:20:27,424 INFO L87 Difference]: Start difference. First operand 37 states and 44 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 06:20:27,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:20:27,486 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2024-11-09 06:20:27,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:20:27,487 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 06:20:27,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:20:27,488 INFO L225 Difference]: With dead ends: 36 [2024-11-09 06:20:27,488 INFO L226 Difference]: Without dead ends: 36 [2024-11-09 06:20:27,488 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:20:27,489 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:20:27,490 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:20:27,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-09 06:20:27,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-09 06:20:27,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 35 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 06:20:27,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2024-11-09 06:20:27,495 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 7 [2024-11-09 06:20:27,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:20:27,495 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2024-11-09 06:20:27,495 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 06:20:27,496 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2024-11-09 06:20:27,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-09 06:20:27,496 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:20:27,496 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:20:27,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 06:20:27,497 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:20:27,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:20:27,498 INFO L85 PathProgramCache]: Analyzing trace with hash -622026281, now seen corresponding path program 1 times [2024-11-09 06:20:27,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:20:27,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370757202] [2024-11-09 06:20:27,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:20:27,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:20:27,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:20:27,555 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 06:20:27,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:20:27,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370757202] [2024-11-09 06:20:27,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370757202] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:20:27,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:20:27,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:20:27,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500915191] [2024-11-09 06:20:27,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:20:27,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:20:27,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:20:27,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:20:27,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:20:27,561 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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 06:20:27,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:20:27,626 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2024-11-09 06:20:27,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:20:27,627 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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 06:20:27,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:20:27,628 INFO L225 Difference]: With dead ends: 33 [2024-11-09 06:20:27,628 INFO L226 Difference]: Without dead ends: 33 [2024-11-09 06:20:27,629 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 06:20:27,630 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:20:27,630 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 35 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:20:27,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-09 06:20:27,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-09 06:20:27,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 32 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 06:20:27,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-11-09 06:20:27,635 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 8 [2024-11-09 06:20:27,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:20:27,635 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-11-09 06:20:27,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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 06:20:27,636 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-11-09 06:20:27,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-09 06:20:27,636 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:20:27,636 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:20:27,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 06:20:27,637 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:20:27,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:20:27,637 INFO L85 PathProgramCache]: Analyzing trace with hash -622026280, now seen corresponding path program 1 times [2024-11-09 06:20:27,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:20:27,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550665028] [2024-11-09 06:20:27,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:20:27,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:20:27,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:20:27,731 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 06:20:27,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:20:27,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550665028] [2024-11-09 06:20:27,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550665028] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:20:27,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:20:27,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:20:27,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061855451] [2024-11-09 06:20:27,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:20:27,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:20:27,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:20:27,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:20:27,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:20:27,734 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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 06:20:27,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:20:27,803 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2024-11-09 06:20:27,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:20:27,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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 06:20:27,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:20:27,804 INFO L225 Difference]: With dead ends: 41 [2024-11-09 06:20:27,804 INFO L226 Difference]: Without dead ends: 41 [2024-11-09 06:20:27,805 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 06:20:27,806 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 30 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:20:27,806 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 46 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:20:27,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-09 06:20:27,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2024-11-09 06:20:27,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 38 states have internal predecessors, (50), 0 states have call successors, (0), 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 06:20:27,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2024-11-09 06:20:27,813 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 8 [2024-11-09 06:20:27,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:20:27,814 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2024-11-09 06:20:27,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 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 06:20:27,814 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2024-11-09 06:20:27,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 06:20:27,814 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:20:27,815 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-09 06:20:27,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 06:20:27,815 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:20:27,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:20:27,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1871199992, now seen corresponding path program 1 times [2024-11-09 06:20:27,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:20:27,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681818732] [2024-11-09 06:20:27,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:20:27,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:20:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:20:28,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:20:28,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:20:28,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681818732] [2024-11-09 06:20:28,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681818732] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:20:28,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942986972] [2024-11-09 06:20:28,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:20:28,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:20:28,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:20:28,201 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:20:28,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 06:20:28,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:20:28,295 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 06:20:28,299 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:20:28,346 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 7 [2024-11-09 06:20:28,360 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 13 treesize of output 1 [2024-11-09 06:20:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:20:28,649 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:20:28,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:20:28,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942986972] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:20:28,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [809796554] [2024-11-09 06:20:28,929 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-09 06:20:28,930 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:20:28,930 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:20:28,930 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:20:28,931 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:20:29,731 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:20:30,800 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '876#(exists ((|v_ULTIMATE.start_main_~nondetString2~0#1.offset_27| Int) (|v_ULTIMATE.start_main_~nondetString2~0#1.base_29| Int) (|v_ULTIMATE.start_main_~i~1#1_34| Int)) (and (<= 1 |#StackHeapBarrier|) (<= (select |#length| |v_ULTIMATE.start_main_~nondetString2~0#1.base_29|) |v_ULTIMATE.start_main_~i~1#1_34|) (<= 0 |v_ULTIMATE.start_main_~i~1#1_34|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet16#1|)) (<= |ULTIMATE.start_main_#t~nondet16#1| 127) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |v_ULTIMATE.start_main_~nondetString2~0#1.base_29|) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (= |v_ULTIMATE.start_main_~nondetString2~0#1.offset_27| 0) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= 2 |ULTIMATE.start_main_~length2~0#1|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647)))' at error location [2024-11-09 06:20:30,800 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:20:30,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:20:30,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2024-11-09 06:20:30,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540898757] [2024-11-09 06:20:30,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:20:30,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 06:20:30,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:20:30,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 06:20:30,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-11-09 06:20:30,804 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 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 06:20:31,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:20:31,163 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2024-11-09 06:20:31,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 06:20:31,164 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-09 06:20:31,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:20:31,164 INFO L225 Difference]: With dead ends: 39 [2024-11-09 06:20:31,164 INFO L226 Difference]: Without dead ends: 39 [2024-11-09 06:20:31,165 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2024-11-09 06:20:31,169 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:20:31,170 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 88 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:20:31,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-09 06:20:31,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2024-11-09 06:20:31,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 34 states have internal predecessors, (44), 0 states have call successors, (0), 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 06:20:31,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2024-11-09 06:20:31,177 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 9 [2024-11-09 06:20:31,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:20:31,178 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2024-11-09 06:20:31,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 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 06:20:31,178 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2024-11-09 06:20:31,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 06:20:31,179 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:20:31,180 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:20:31,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 06:20:31,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 06:20:31,385 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:20:31,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:20:31,387 INFO L85 PathProgramCache]: Analyzing trace with hash 2000351138, now seen corresponding path program 1 times [2024-11-09 06:20:31,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:20:31,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262158038] [2024-11-09 06:20:31,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:20:31,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:20:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:20:31,467 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 06:20:31,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:20:31,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262158038] [2024-11-09 06:20:31,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262158038] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:20:31,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:20:31,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:20:31,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362961160] [2024-11-09 06:20:31,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:20:31,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:20:31,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:20:31,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:20:31,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:20:31,473 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:20:31,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:20:31,527 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2024-11-09 06:20:31,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:20:31,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-09 06:20:31,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:20:31,530 INFO L225 Difference]: With dead ends: 33 [2024-11-09 06:20:31,530 INFO L226 Difference]: Without dead ends: 33 [2024-11-09 06:20:31,530 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:20:31,532 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:20:31,532 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 26 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:20:31,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-09 06:20:31,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-09 06:20:31,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 32 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 06:20:31,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2024-11-09 06:20:31,539 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 11 [2024-11-09 06:20:31,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:20:31,540 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2024-11-09 06:20:31,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:20:31,540 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2024-11-09 06:20:31,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 06:20:31,541 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:20:31,541 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:20:31,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 06:20:31,542 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:20:31,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:20:31,542 INFO L85 PathProgramCache]: Analyzing trace with hash 2000351139, now seen corresponding path program 1 times [2024-11-09 06:20:31,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:20:31,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439888774] [2024-11-09 06:20:31,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:20:31,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:20:31,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:20:31,710 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 06:20:31,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:20:31,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439888774] [2024-11-09 06:20:31,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439888774] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:20:31,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:20:31,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:20:31,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685469140] [2024-11-09 06:20:31,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:20:31,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:20:31,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:20:31,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:20:31,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:20:31,713 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:20:31,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:20:31,783 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2024-11-09 06:20:31,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:20:31,784 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-09 06:20:31,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:20:31,785 INFO L225 Difference]: With dead ends: 34 [2024-11-09 06:20:31,785 INFO L226 Difference]: Without dead ends: 34 [2024-11-09 06:20:31,785 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 06:20:31,787 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:20:31,788 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 41 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:20:31,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-09 06:20:31,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-09 06:20:31,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 33 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 06:20:31,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2024-11-09 06:20:31,795 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 11 [2024-11-09 06:20:31,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:20:31,795 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2024-11-09 06:20:31,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:20:31,796 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2024-11-09 06:20:31,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 06:20:31,797 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:20:31,797 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:20:31,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 06:20:31,798 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:20:31,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:20:31,800 INFO L85 PathProgramCache]: Analyzing trace with hash 2000360212, now seen corresponding path program 1 times [2024-11-09 06:20:31,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:20:31,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409901230] [2024-11-09 06:20:31,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:20:31,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:20:31,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:20:31,836 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 06:20:31,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:20:31,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409901230] [2024-11-09 06:20:31,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409901230] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:20:31,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:20:31,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:20:31,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851672620] [2024-11-09 06:20:31,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:20:31,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:20:31,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:20:31,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:20:31,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:20:31,839 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:20:31,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:20:31,874 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2024-11-09 06:20:31,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:20:31,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-09 06:20:31,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:20:31,876 INFO L225 Difference]: With dead ends: 36 [2024-11-09 06:20:31,876 INFO L226 Difference]: Without dead ends: 36 [2024-11-09 06:20:31,876 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 06:20:31,877 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:20:31,878 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:20:31,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-09 06:20:31,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-09 06:20:31,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 35 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 06:20:31,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2024-11-09 06:20:31,881 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 11 [2024-11-09 06:20:31,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:20:31,882 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2024-11-09 06:20:31,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:20:31,882 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2024-11-09 06:20:31,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 06:20:31,883 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:20:31,883 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:20:31,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-09 06:20:31,883 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:20:31,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:20:31,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1807867821, now seen corresponding path program 1 times [2024-11-09 06:20:31,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:20:31,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124824954] [2024-11-09 06:20:31,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:20:31,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:20:31,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:20:32,179 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 06:20:32,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:20:32,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124824954] [2024-11-09 06:20:32,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124824954] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:20:32,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:20:32,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 06:20:32,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963543796] [2024-11-09 06:20:32,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:20:32,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 06:20:32,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:20:32,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 06:20:32,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 06:20:32,186 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) 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 06:20:32,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:20:32,332 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2024-11-09 06:20:32,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 06:20:32,333 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) 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 06:20:32,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:20:32,333 INFO L225 Difference]: With dead ends: 48 [2024-11-09 06:20:32,333 INFO L226 Difference]: Without dead ends: 48 [2024-11-09 06:20:32,334 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-09 06:20:32,334 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:20:32,335 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 76 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:20:32,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-09 06:20:32,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2024-11-09 06:20:32,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.358974358974359) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:20:32,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2024-11-09 06:20:32,337 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 13 [2024-11-09 06:20:32,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:20:32,338 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2024-11-09 06:20:32,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) 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 06:20:32,338 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2024-11-09 06:20:32,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 06:20:32,339 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:20:32,339 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:20:32,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-09 06:20:32,339 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:20:32,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:20:32,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1799199691, now seen corresponding path program 1 times [2024-11-09 06:20:32,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:20:32,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596184470] [2024-11-09 06:20:32,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:20:32,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:20:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:20:32,557 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 06:20:32,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:20:32,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596184470] [2024-11-09 06:20:32,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596184470] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:20:32,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:20:32,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:20:32,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263049411] [2024-11-09 06:20:32,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:20:32,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:20:32,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:20:32,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:20:32,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:20:32,560 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 06:20:32,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:20:32,594 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2024-11-09 06:20:32,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:20:32,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 06:20:32,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:20:32,595 INFO L225 Difference]: With dead ends: 44 [2024-11-09 06:20:32,596 INFO L226 Difference]: Without dead ends: 31 [2024-11-09 06:20:32,596 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 06:20:32,597 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:20:32,597 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 36 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:20:32,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-09 06:20:32,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2024-11-09 06:20:32,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.32) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:20:32,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-11-09 06:20:32,600 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 13 [2024-11-09 06:20:32,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:20:32,600 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-11-09 06:20:32,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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 06:20:32,601 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-11-09 06:20:32,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-09 06:20:32,601 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:20:32,602 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:20:32,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-09 06:20:32,602 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:20:32,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:20:32,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1633063633, now seen corresponding path program 1 times [2024-11-09 06:20:32,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:20:32,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56677464] [2024-11-09 06:20:32,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:20:32,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:20:32,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:20:32,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:20:32,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:20:32,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56677464] [2024-11-09 06:20:32,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56677464] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:20:32,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445357365] [2024-11-09 06:20:32,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:20:32,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:20:32,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:20:32,803 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:20:32,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 06:20:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:20:32,909 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 06:20:32,911 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:20:33,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:20:33,047 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:20:33,181 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 5 treesize of output 3 [2024-11-09 06:20:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:20:33,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445357365] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:20:33,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1632627504] [2024-11-09 06:20:33,218 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2024-11-09 06:20:33,218 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:20:33,218 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:20:33,219 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:20:33,219 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:20:33,994 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:20:35,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1632627504] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:20:35,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:20:35,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 6, 6] total 27 [2024-11-09 06:20:35,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858905324] [2024-11-09 06:20:35,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:20:35,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 06:20:35,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:20:35,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 06:20:35,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2024-11-09 06:20:35,215 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:20:35,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:20:35,633 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2024-11-09 06:20:35,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 06:20:35,634 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-09 06:20:35,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:20:35,634 INFO L225 Difference]: With dead ends: 41 [2024-11-09 06:20:35,635 INFO L226 Difference]: Without dead ends: 33 [2024-11-09 06:20:35,635 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2024-11-09 06:20:35,638 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:20:35,638 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 42 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:20:35,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-09 06:20:35,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2024-11-09 06:20:35,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 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 06:20:35,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2024-11-09 06:20:35,641 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 16 [2024-11-09 06:20:35,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:20:35,642 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2024-11-09 06:20:35,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:20:35,642 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2024-11-09 06:20:35,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 06:20:35,643 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:20:35,643 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 06:20:35,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 06:20:35,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 06:20:35,844 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:20:35,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:20:35,845 INFO L85 PathProgramCache]: Analyzing trace with hash -711825550, now seen corresponding path program 1 times [2024-11-09 06:20:35,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:20:35,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440504582] [2024-11-09 06:20:35,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:20:35,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:20:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:20:36,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:20:36,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:20:36,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440504582] [2024-11-09 06:20:36,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440504582] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:20:36,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948740205] [2024-11-09 06:20:36,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:20:36,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:20:36,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:20:36,096 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:20:36,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 06:20:36,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:20:36,207 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 06:20:36,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:20:36,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:20:36,356 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:20:36,487 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 5 treesize of output 3 [2024-11-09 06:20:36,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:20:36,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948740205] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:20:36,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2060408754] [2024-11-09 06:20:36,545 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:20:36,547 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:20:36,548 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:20:36,548 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:20:36,548 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:20:38,221 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:20:39,673 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1678#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_40| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_37| Int)) (and (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_40|) 1) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_40|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_37|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_40|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_37|) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_37|) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:20:39,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:20:39,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:20:39,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2024-11-09 06:20:39,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148717349] [2024-11-09 06:20:39,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:20:39,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 06:20:39,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:20:39,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 06:20:39,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=820, Unknown=1, NotChecked=0, Total=930 [2024-11-09 06:20:39,676 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 17 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 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 06:20:39,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:20:39,857 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2024-11-09 06:20:39,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 06:20:39,858 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 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 06:20:39,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:20:39,859 INFO L225 Difference]: With dead ends: 39 [2024-11-09 06:20:39,859 INFO L226 Difference]: Without dead ends: 39 [2024-11-09 06:20:39,859 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=117, Invalid=874, Unknown=1, NotChecked=0, Total=992 [2024-11-09 06:20:39,860 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:20:39,860 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 90 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:20:39,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-09 06:20:39,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2024-11-09 06:20:39,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:20:39,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-11-09 06:20:39,867 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 19 [2024-11-09 06:20:39,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:20:39,868 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-11-09 06:20:39,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 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 06:20:39,868 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-11-09 06:20:39,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 06:20:39,869 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:20:39,869 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:20:39,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 06:20:40,069 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 06:20:40,070 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:20:40,070 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:20:40,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1740043319, now seen corresponding path program 1 times [2024-11-09 06:20:40,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:20:40,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312308007] [2024-11-09 06:20:40,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:20:40,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:20:40,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:20:40,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:20:40,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:20:40,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312308007] [2024-11-09 06:20:40,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312308007] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:20:40,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633262065] [2024-11-09 06:20:40,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:20:40,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:20:40,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:20:40,372 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:20:40,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 06:20:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:20:40,460 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 06:20:40,463 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:20:40,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:20:40,560 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:20:40,660 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 5 treesize of output 3 [2024-11-09 06:20:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:20:40,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633262065] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:20:40,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [69281064] [2024-11-09 06:20:40,697 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:20:40,697 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:20:40,698 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:20:40,698 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:20:40,699 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:20:41,809 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:20:43,194 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1904#(and (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)))' at error location [2024-11-09 06:20:43,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:20:43,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:20:43,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-09 06:20:43,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737986473] [2024-11-09 06:20:43,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:20:43,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 06:20:43,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:20:43,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 06:20:43,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=713, Unknown=1, NotChecked=0, Total=812 [2024-11-09 06:20:43,197 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 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 06:20:43,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:20:43,389 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2024-11-09 06:20:43,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 06:20:43,390 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 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 06:20:43,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:20:43,391 INFO L225 Difference]: With dead ends: 41 [2024-11-09 06:20:43,391 INFO L226 Difference]: Without dead ends: 36 [2024-11-09 06:20:43,392 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=105, Invalid=764, Unknown=1, NotChecked=0, Total=870 [2024-11-09 06:20:43,393 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:20:43,393 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 70 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:20:43,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-09 06:20:43,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2024-11-09 06:20:43,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 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 06:20:43,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2024-11-09 06:20:43,397 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 22 [2024-11-09 06:20:43,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:20:43,397 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2024-11-09 06:20:43,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 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 06:20:43,398 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2024-11-09 06:20:43,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-09 06:20:43,398 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:20:43,398 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:20:43,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 06:20:43,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 06:20:43,603 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:20:43,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:20:43,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1439315207, now seen corresponding path program 2 times [2024-11-09 06:20:43,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:20:43,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229709970] [2024-11-09 06:20:43,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:20:43,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:20:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:20:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:20:44,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:20:44,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229709970] [2024-11-09 06:20:44,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229709970] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:20:44,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197302414] [2024-11-09 06:20:44,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:20:44,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:20:44,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:20:44,273 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:20:44,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 06:20:44,395 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 06:20:44,396 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:20:44,398 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 06:20:44,400 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:20:44,488 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 06:20:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:20:44,684 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:20:44,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-09 06:20:44,842 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 16 treesize of output 12 [2024-11-09 06:20:44,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:20:44,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197302414] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:20:44,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1462996357] [2024-11-09 06:20:44,933 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:20:44,933 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:20:44,933 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:20:44,934 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:20:44,934 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:20:46,512 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:20:48,287 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2156#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_50| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_53| Int)) (and (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (= |v_ULTIMATE.start_cstrcmp_~s1#1.offset_50| (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_53|)) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_50|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_53|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_50|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_53|) 1) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:20:48,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:20:48,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:20:48,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 24 [2024-11-09 06:20:48,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573492402] [2024-11-09 06:20:48,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:20:48,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 06:20:48,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:20:48,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 06:20:48,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1294, Unknown=1, NotChecked=0, Total=1406 [2024-11-09 06:20:48,290 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:20:49,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:20:49,032 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2024-11-09 06:20:49,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-09 06:20:49,033 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-09 06:20:49,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:20:49,033 INFO L225 Difference]: With dead ends: 86 [2024-11-09 06:20:49,033 INFO L226 Difference]: Without dead ends: 43 [2024-11-09 06:20:49,035 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=192, Invalid=2257, Unknown=1, NotChecked=0, Total=2450 [2024-11-09 06:20:49,035 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:20:49,036 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 81 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:20:49,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-09 06:20:49,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2024-11-09 06:20:49,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 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 06:20:49,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2024-11-09 06:20:49,038 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 24 [2024-11-09 06:20:49,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:20:49,039 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2024-11-09 06:20:49,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:20:49,039 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2024-11-09 06:20:49,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-09 06:20:49,040 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:20:49,040 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:20:49,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 06:20:49,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:20:49,245 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:20:49,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:20:49,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1865503592, now seen corresponding path program 3 times [2024-11-09 06:20:49,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:20:49,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225639260] [2024-11-09 06:20:49,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:20:49,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:20:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:20:49,640 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 06:20:49,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:20:49,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225639260] [2024-11-09 06:20:49,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225639260] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:20:49,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504521022] [2024-11-09 06:20:49,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:20:49,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:20:49,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:20:49,643 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:20:49,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 06:20:49,786 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:20:49,786 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:20:49,791 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 06:20:49,793 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:20:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 06:20:49,956 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:20:50,132 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 5 treesize of output 3 [2024-11-09 06:20:50,207 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 06:20:50,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504521022] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:20:50,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [679104106] [2024-11-09 06:20:50,211 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:20:50,211 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:20:50,211 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:20:50,211 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:20:50,212 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:20:51,268 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:20:52,887 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2513#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_63| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_60| Int)) (and (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_63|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_60|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_63|) 1) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_60|) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_63|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_60|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:20:52,887 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:20:52,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:20:52,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 18 [2024-11-09 06:20:52,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453634938] [2024-11-09 06:20:52,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:20:52,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 06:20:52,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:20:52,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 06:20:52,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 06:20:52,890 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 20 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 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 06:20:53,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:20:53,117 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2024-11-09 06:20:53,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 06:20:53,118 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 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 30 [2024-11-09 06:20:53,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:20:53,119 INFO L225 Difference]: With dead ends: 48 [2024-11-09 06:20:53,119 INFO L226 Difference]: Without dead ends: 48 [2024-11-09 06:20:53,119 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 06:20:53,120 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:20:53,120 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 113 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:20:53,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-09 06:20:53,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2024-11-09 06:20:53,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 38 states have (on average 1.131578947368421) internal successors, (43), 40 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 06:20:53,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2024-11-09 06:20:53,124 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 30 [2024-11-09 06:20:53,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:20:53,124 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2024-11-09 06:20:53,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 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 06:20:53,125 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2024-11-09 06:20:53,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 06:20:53,125 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:20:53,126 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:20:53,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 06:20:53,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-11-09 06:20:53,327 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:20:53,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:20:53,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1660677347, now seen corresponding path program 2 times [2024-11-09 06:20:53,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:20:53,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473467797] [2024-11-09 06:20:53,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:20:53,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:20:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:20:53,772 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 06:20:53,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:20:53,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473467797] [2024-11-09 06:20:53,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473467797] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:20:53,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288442705] [2024-11-09 06:20:53,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:20:53,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:20:53,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:20:53,777 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:20:53,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 06:20:53,958 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 06:20:53,958 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:20:53,960 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 06:20:53,964 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:20:53,971 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 06:20:54,157 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 06:20:54,157 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:20:54,469 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 06:20:54,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288442705] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:20:54,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [921430001] [2024-11-09 06:20:54,474 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:20:54,475 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:20:54,475 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:20:54,476 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:20:54,476 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:20:55,719 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:20:57,187 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2833#(and (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)))' at error location [2024-11-09 06:20:57,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:20:57,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:20:57,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2024-11-09 06:20:57,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743776104] [2024-11-09 06:20:57,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:20:57,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 06:20:57,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:20:57,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 06:20:57,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1125, Unknown=1, NotChecked=0, Total=1260 [2024-11-09 06:20:57,189 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 23 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 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 06:20:57,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:20:57,443 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2024-11-09 06:20:57,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 06:20:57,444 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 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 33 [2024-11-09 06:20:57,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:20:57,444 INFO L225 Difference]: With dead ends: 48 [2024-11-09 06:20:57,445 INFO L226 Difference]: Without dead ends: 45 [2024-11-09 06:20:57,445 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=145, Invalid=1186, Unknown=1, NotChecked=0, Total=1332 [2024-11-09 06:20:57,446 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:20:57,446 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 105 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:20:57,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-09 06:20:57,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2024-11-09 06:20:57,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:20:57,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2024-11-09 06:20:57,450 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 33 [2024-11-09 06:20:57,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:20:57,450 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2024-11-09 06:20:57,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 23 states have internal predecessors, (85), 0 states have call successors, (0), 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 06:20:57,451 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2024-11-09 06:20:57,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 06:20:57,451 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:20:57,452 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:20:57,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 06:20:57,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-09 06:20:57,656 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:20:57,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:20:57,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1816867437, now seen corresponding path program 4 times [2024-11-09 06:20:57,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:20:57,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339447274] [2024-11-09 06:20:57,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:20:57,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:20:57,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:20:58,157 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 06:20:58,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:20:58,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339447274] [2024-11-09 06:20:58,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339447274] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:20:58,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129549796] [2024-11-09 06:20:58,158 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:20:58,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:20:58,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:20:58,161 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:20:58,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 06:20:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:20:58,266 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-09 06:20:58,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:20:58,382 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 06:20:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 06:20:58,659 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:20:58,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-09 06:20:58,859 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 16 treesize of output 12 [2024-11-09 06:20:58,968 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 06:20:58,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129549796] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:20:58,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [465880877] [2024-11-09 06:20:58,972 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:20:58,972 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:20:58,972 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:20:58,973 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:20:58,973 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:21:00,156 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:21:02,186 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3172#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_74| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_77| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_77|) 1) (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_77|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_74|) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_77|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_74|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_74|) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:21:02,186 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:21:02,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:21:02,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 28 [2024-11-09 06:21:02,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062035126] [2024-11-09 06:21:02,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:21:02,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 06:21:02,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:21:02,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 06:21:02,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1604, Unknown=2, NotChecked=0, Total=1722 [2024-11-09 06:21:02,189 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 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 06:21:03,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:21:03,454 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2024-11-09 06:21:03,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-09 06:21:03,458 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 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) Word has length 35 [2024-11-09 06:21:03,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:21:03,458 INFO L225 Difference]: With dead ends: 115 [2024-11-09 06:21:03,459 INFO L226 Difference]: Without dead ends: 54 [2024-11-09 06:21:03,460 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=217, Invalid=3203, Unknown=2, NotChecked=0, Total=3422 [2024-11-09 06:21:03,461 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:21:03,461 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 143 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:21:03,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-09 06:21:03,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2024-11-09 06:21:03,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 49 states have internal predecessors, (52), 0 states have call successors, (0), 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 06:21:03,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2024-11-09 06:21:03,467 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 35 [2024-11-09 06:21:03,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:21:03,468 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2024-11-09 06:21:03,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 28 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 06:21:03,468 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2024-11-09 06:21:03,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-09 06:21:03,469 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:21:03,470 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:21:03,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 06:21:03,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:21:03,674 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:21:03,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:21:03,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1388673358, now seen corresponding path program 5 times [2024-11-09 06:21:03,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:21:03,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851346792] [2024-11-09 06:21:03,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:21:03,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:21:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:21:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:21:04,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:21:04,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851346792] [2024-11-09 06:21:04,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851346792] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:21:04,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013748141] [2024-11-09 06:21:04,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:21:04,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:21:04,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:21:04,108 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:21:04,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 06:21:04,269 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 06:21:04,270 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:21:04,272 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 06:21:04,274 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:21:04,567 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:21:04,567 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:21:04,845 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 06:21:04,952 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:21:04,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013748141] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:21:04,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1344729243] [2024-11-09 06:21:04,954 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:21:04,955 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:21:04,955 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:21:04,955 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:21:04,955 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:21:06,150 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:21:07,812 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3652#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_86| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_89| Int)) (and (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_89|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_86|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_86|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_89|) 1) (= |v_ULTIMATE.start_cstrcmp_~s1#1.offset_86| (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_89|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:21:07,812 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:21:07,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:21:07,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 25 [2024-11-09 06:21:07,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129130271] [2024-11-09 06:21:07,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:21:07,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-09 06:21:07,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:21:07,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-09 06:21:07,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1475, Unknown=1, NotChecked=0, Total=1640 [2024-11-09 06:21:07,814 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 27 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 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 06:21:08,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:21:08,023 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2024-11-09 06:21:08,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 06:21:08,024 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 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 41 [2024-11-09 06:21:08,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:21:08,024 INFO L225 Difference]: With dead ends: 59 [2024-11-09 06:21:08,025 INFO L226 Difference]: Without dead ends: 59 [2024-11-09 06:21:08,025 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 85 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=173, Invalid=1548, Unknown=1, NotChecked=0, Total=1722 [2024-11-09 06:21:08,026 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:21:08,026 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 117 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:21:08,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-09 06:21:08,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2024-11-09 06:21:08,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 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 06:21:08,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2024-11-09 06:21:08,029 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 41 [2024-11-09 06:21:08,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:21:08,029 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2024-11-09 06:21:08,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 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 06:21:08,030 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2024-11-09 06:21:08,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-09 06:21:08,031 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:21:08,031 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:21:08,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 06:21:08,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:21:08,235 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:21:08,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:21:08,236 INFO L85 PathProgramCache]: Analyzing trace with hash -841636727, now seen corresponding path program 3 times [2024-11-09 06:21:08,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:21:08,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051739024] [2024-11-09 06:21:08,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:21:08,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:21:08,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:21:08,614 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:21:08,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:21:08,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051739024] [2024-11-09 06:21:08,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051739024] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:21:08,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810730081] [2024-11-09 06:21:08,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:21:08,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:21:08,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:21:08,616 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:21:08,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 06:21:08,738 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:21:08,738 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:21:08,744 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 06:21:08,746 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:21:08,925 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:21:08,925 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:21:09,142 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 5 treesize of output 3 [2024-11-09 06:21:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:21:09,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810730081] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:21:09,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [875730758] [2024-11-09 06:21:09,222 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:21:09,222 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:21:09,223 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:21:09,223 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:21:09,223 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:21:10,508 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:21:11,997 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4059#(and (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)))' at error location [2024-11-09 06:21:11,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:21:11,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:21:11,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 21 [2024-11-09 06:21:11,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542066149] [2024-11-09 06:21:11,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:21:11,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 06:21:11,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:21:11,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 06:21:12,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1059, Unknown=1, NotChecked=0, Total=1190 [2024-11-09 06:21:12,000 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 22 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 22 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 06:21:12,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:21:12,286 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2024-11-09 06:21:12,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 06:21:12,287 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 22 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 44 [2024-11-09 06:21:12,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:21:12,288 INFO L225 Difference]: With dead ends: 59 [2024-11-09 06:21:12,288 INFO L226 Difference]: Without dead ends: 56 [2024-11-09 06:21:12,288 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 100 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=140, Invalid=1119, Unknown=1, NotChecked=0, Total=1260 [2024-11-09 06:21:12,289 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:21:12,289 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 156 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:21:12,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-09 06:21:12,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2024-11-09 06:21:12,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 54 states have internal predecessors, (57), 0 states have call successors, (0), 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 06:21:12,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2024-11-09 06:21:12,292 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 44 [2024-11-09 06:21:12,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:21:12,293 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2024-11-09 06:21:12,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.9047619047619047) internal successors, (82), 22 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 06:21:12,293 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2024-11-09 06:21:12,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 06:21:12,294 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:21:12,295 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:21:12,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 06:21:12,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-09 06:21:12,499 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:21:12,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:21:12,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1359006791, now seen corresponding path program 6 times [2024-11-09 06:21:12,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:21:12,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882265000] [2024-11-09 06:21:12,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:21:12,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:21:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:21:13,223 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:21:13,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:21:13,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882265000] [2024-11-09 06:21:13,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882265000] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:21:13,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746904048] [2024-11-09 06:21:13,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:21:13,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:21:13,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:21:13,225 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:21:13,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 06:21:13,349 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:21:13,349 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:21:13,351 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-09 06:21:13,353 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:21:13,507 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 06:21:13,821 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:21:13,821 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:21:14,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-09 06:21:14,030 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 16 treesize of output 12 [2024-11-09 06:21:14,126 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:21:14,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746904048] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:21:14,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [96668411] [2024-11-09 06:21:14,128 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:21:14,128 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:21:14,128 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:21:14,128 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:21:14,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:21:15,273 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:21:17,465 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4490#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_103| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_106| Int)) (and (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_106|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_103|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_103|) (= |v_ULTIMATE.start_cstrcmp_~s1#1.offset_103| (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_106|)) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_106|) 1) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:21:17,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:21:17,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:21:17,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 16] total 32 [2024-11-09 06:21:17,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042128988] [2024-11-09 06:21:17,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:21:17,466 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-09 06:21:17,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:21:17,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-09 06:21:17,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1945, Unknown=1, NotChecked=0, Total=2070 [2024-11-09 06:21:17,467 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 0 states have call successors, (0), 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 06:21:18,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:21:18,917 INFO L93 Difference]: Finished difference Result 144 states and 147 transitions. [2024-11-09 06:21:18,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-09 06:21:18,918 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 0 states have call successors, (0), 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 46 [2024-11-09 06:21:18,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:21:18,919 INFO L225 Difference]: With dead ends: 144 [2024-11-09 06:21:18,919 INFO L226 Difference]: Without dead ends: 65 [2024-11-09 06:21:18,920 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 102 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=245, Invalid=4176, Unknown=1, NotChecked=0, Total=4422 [2024-11-09 06:21:18,921 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:21:18,921 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 186 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 06:21:18,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-09 06:21:18,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2024-11-09 06:21:18,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 60 states have internal predecessors, (63), 0 states have call successors, (0), 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 06:21:18,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2024-11-09 06:21:18,928 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 46 [2024-11-09 06:21:18,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:21:18,929 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2024-11-09 06:21:18,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 0 states have call successors, (0), 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 06:21:18,929 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2024-11-09 06:21:18,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-09 06:21:18,930 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:21:18,930 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:21:18,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 06:21:19,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-09 06:21:19,131 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:21:19,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:21:19,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1626380456, now seen corresponding path program 7 times [2024-11-09 06:21:19,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:21:19,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666876869] [2024-11-09 06:21:19,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:21:19,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:21:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:21:19,651 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 5 proven. 51 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 06:21:19,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:21:19,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666876869] [2024-11-09 06:21:19,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666876869] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:21:19,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291545299] [2024-11-09 06:21:19,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:21:19,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:21:19,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:21:19,655 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:21:19,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 06:21:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:21:19,825 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-09 06:21:19,827 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:21:20,125 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 06:21:20,125 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:21:20,386 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 5 treesize of output 3 [2024-11-09 06:21:20,510 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 06:21:20,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291545299] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:21:20,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1547318678] [2024-11-09 06:21:20,515 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:21:20,517 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:21:20,518 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:21:20,518 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:21:20,518 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:21:21,757 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:21:23,514 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5085#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_117| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_120| Int)) (and (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_120|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_117|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_117|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= |v_ULTIMATE.start_cstrcmp_~s1#1.offset_117| (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_120|)) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_120|) 1) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:21:23,514 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:21:23,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:21:23,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 26 [2024-11-09 06:21:23,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750203427] [2024-11-09 06:21:23,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:21:23,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 06:21:23,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:21:23,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 06:21:23,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1562, Unknown=1, NotChecked=0, Total=1722 [2024-11-09 06:21:23,517 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 28 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 27 states have internal predecessors, (93), 0 states have call successors, (0), 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 06:21:23,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:21:23,868 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2024-11-09 06:21:23,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 06:21:23,869 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 27 states have internal predecessors, (93), 0 states have call successors, (0), 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 52 [2024-11-09 06:21:23,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:21:23,870 INFO L225 Difference]: With dead ends: 70 [2024-11-09 06:21:23,870 INFO L226 Difference]: Without dead ends: 70 [2024-11-09 06:21:23,870 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 118 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=170, Invalid=1635, Unknown=1, NotChecked=0, Total=1806 [2024-11-09 06:21:23,871 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:21:23,871 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 135 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:21:23,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-09 06:21:23,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2024-11-09 06:21:23,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 62 states have internal predecessors, (65), 0 states have call successors, (0), 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 06:21:23,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2024-11-09 06:21:23,874 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 52 [2024-11-09 06:21:23,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:21:23,875 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2024-11-09 06:21:23,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 27 states have internal predecessors, (93), 0 states have call successors, (0), 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 06:21:23,875 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2024-11-09 06:21:23,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-09 06:21:23,876 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:21:23,879 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:21:23,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-09 06:21:24,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-09 06:21:24,084 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:21:24,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:21:24,084 INFO L85 PathProgramCache]: Analyzing trace with hash 27277859, now seen corresponding path program 4 times [2024-11-09 06:21:24,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:21:24,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782451230] [2024-11-09 06:21:24,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:21:24,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:21:24,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:21:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 5 proven. 63 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 06:21:24,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:21:24,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782451230] [2024-11-09 06:21:24,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782451230] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:21:24,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158202529] [2024-11-09 06:21:24,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:21:24,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:21:24,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:21:24,699 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:21:24,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 06:21:24,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:21:24,848 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-09 06:21:24,850 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:21:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 12 proven. 56 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 06:21:25,058 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:21:25,287 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 5 treesize of output 3 [2024-11-09 06:21:25,373 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 12 proven. 56 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 06:21:25,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158202529] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:21:25,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1019065587] [2024-11-09 06:21:25,375 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:21:25,375 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:21:25,376 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:21:25,376 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:21:25,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:21:26,299 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:21:27,785 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5584#(and (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)))' at error location [2024-11-09 06:21:27,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:21:27,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:21:27,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 25 [2024-11-09 06:21:27,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113692413] [2024-11-09 06:21:27,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:21:27,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 06:21:27,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:21:27,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 06:21:27,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1327, Unknown=1, NotChecked=0, Total=1482 [2024-11-09 06:21:27,788 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 26 states, 25 states have (on average 3.92) internal successors, (98), 26 states have internal predecessors, (98), 0 states have call successors, (0), 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 06:21:28,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:21:28,195 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2024-11-09 06:21:28,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 06:21:28,196 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.92) internal successors, (98), 26 states have internal predecessors, (98), 0 states have call successors, (0), 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 55 [2024-11-09 06:21:28,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:21:28,197 INFO L225 Difference]: With dead ends: 70 [2024-11-09 06:21:28,197 INFO L226 Difference]: Without dead ends: 67 [2024-11-09 06:21:28,198 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 130 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=166, Invalid=1393, Unknown=1, NotChecked=0, Total=1560 [2024-11-09 06:21:28,198 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:21:28,198 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 167 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:21:28,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-09 06:21:28,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2024-11-09 06:21:28,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 65 states have internal predecessors, (68), 0 states have call successors, (0), 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 06:21:28,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2024-11-09 06:21:28,202 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 55 [2024-11-09 06:21:28,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:21:28,202 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2024-11-09 06:21:28,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.92) internal successors, (98), 26 states have internal predecessors, (98), 0 states have call successors, (0), 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 06:21:28,203 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2024-11-09 06:21:28,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-09 06:21:28,203 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:21:28,204 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:21:28,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 06:21:28,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-09 06:21:28,404 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:21:28,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:21:28,405 INFO L85 PathProgramCache]: Analyzing trace with hash 444254931, now seen corresponding path program 8 times [2024-11-09 06:21:28,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:21:28,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486230862] [2024-11-09 06:21:28,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:21:28,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:21:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:21:29,252 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 17 proven. 60 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 06:21:29,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:21:29,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486230862] [2024-11-09 06:21:29,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486230862] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:21:29,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978236052] [2024-11-09 06:21:29,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:21:29,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:21:29,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:21:29,256 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:21:29,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 06:21:29,628 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-09 06:21:29,628 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:21:29,630 INFO L255 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-09 06:21:29,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:21:29,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 06:21:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 5 proven. 72 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 06:21:30,177 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:21:30,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-09 06:21:30,415 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 16 treesize of output 12 [2024-11-09 06:21:30,528 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 5 proven. 72 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 06:21:30,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978236052] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:21:30,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2068825830] [2024-11-09 06:21:30,530 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:21:30,531 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:21:30,531 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:21:30,531 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:21:30,531 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:21:31,440 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:21:33,830 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6107#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_136| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_139| Int)) (and (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_136|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_139|) 1) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_139|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_136|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_139|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_136|) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:21:33,831 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:21:33,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:21:33,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 36 [2024-11-09 06:21:33,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728666863] [2024-11-09 06:21:33,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:21:33,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-09 06:21:33,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:21:33,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-09 06:21:33,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2317, Unknown=1, NotChecked=0, Total=2450 [2024-11-09 06:21:33,834 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 36 states, 36 states have (on average 2.8333333333333335) internal successors, (102), 36 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 06:21:35,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:21:35,907 INFO L93 Difference]: Finished difference Result 173 states and 176 transitions. [2024-11-09 06:21:35,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-09 06:21:35,908 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.8333333333333335) internal successors, (102), 36 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 57 [2024-11-09 06:21:35,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:21:35,908 INFO L225 Difference]: With dead ends: 173 [2024-11-09 06:21:35,908 INFO L226 Difference]: Without dead ends: 76 [2024-11-09 06:21:35,910 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=273, Invalid=5276, Unknown=1, NotChecked=0, Total=5550 [2024-11-09 06:21:35,911 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 1569 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:21:35,911 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 237 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1569 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 06:21:35,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-09 06:21:35,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2024-11-09 06:21:35,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 71 states have internal predecessors, (74), 0 states have call successors, (0), 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 06:21:35,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2024-11-09 06:21:35,914 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 57 [2024-11-09 06:21:35,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:21:35,915 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2024-11-09 06:21:35,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.8333333333333335) internal successors, (102), 36 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 06:21:35,915 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2024-11-09 06:21:35,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-09 06:21:35,916 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:21:35,916 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:21:35,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 06:21:36,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 06:21:36,117 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:21:36,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:21:36,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1652427278, now seen corresponding path program 9 times [2024-11-09 06:21:36,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:21:36,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34159308] [2024-11-09 06:21:36,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:21:36,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:21:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:21:36,732 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 12 proven. 78 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 06:21:36,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:21:36,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34159308] [2024-11-09 06:21:36,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34159308] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:21:36,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445999274] [2024-11-09 06:21:36,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:21:36,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:21:36,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:21:36,734 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:21:36,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 06:21:37,007 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:21:37,007 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:21:37,011 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-09 06:21:37,013 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:21:37,414 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 22 proven. 68 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 06:21:37,414 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:21:37,715 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 06:21:38,071 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 22 proven. 68 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 06:21:38,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445999274] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:21:38,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [387443613] [2024-11-09 06:21:38,074 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:21:38,074 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:21:38,074 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:21:38,074 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:21:38,075 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:21:39,194 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:21:41,147 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6824#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_155| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_152| Int)) (and (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (= |v_ULTIMATE.start_cstrcmp_~s1#1.offset_152| (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_155|)) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= 1 (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_155|)) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_155|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_152|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_152|)))' at error location [2024-11-09 06:21:41,147 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:21:41,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:21:41,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2024-11-09 06:21:41,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965634391] [2024-11-09 06:21:41,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:21:41,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-09 06:21:41,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:21:41,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-09 06:21:41,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2216, Unknown=1, NotChecked=0, Total=2450 [2024-11-09 06:21:41,150 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 36 states, 35 states have (on average 3.7714285714285714) internal successors, (132), 35 states have internal predecessors, (132), 0 states have call successors, (0), 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 06:21:41,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:21:41,617 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2024-11-09 06:21:41,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 06:21:41,618 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.7714285714285714) internal successors, (132), 35 states have internal predecessors, (132), 0 states have call successors, (0), 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 63 [2024-11-09 06:21:41,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:21:41,619 INFO L225 Difference]: With dead ends: 81 [2024-11-09 06:21:41,619 INFO L226 Difference]: Without dead ends: 81 [2024-11-09 06:21:41,619 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 150 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=252, Invalid=2297, Unknown=1, NotChecked=0, Total=2550 [2024-11-09 06:21:41,620 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 17 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:21:41,620 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 197 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:21:41,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-09 06:21:41,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2024-11-09 06:21:41,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 73 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 06:21:41,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2024-11-09 06:21:41,623 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 63 [2024-11-09 06:21:41,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:21:41,624 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2024-11-09 06:21:41,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.7714285714285714) internal successors, (132), 35 states have internal predecessors, (132), 0 states have call successors, (0), 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 06:21:41,624 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2024-11-09 06:21:41,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-09 06:21:41,625 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:21:41,625 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:21:41,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-09 06:21:41,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-09 06:21:41,826 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:21:41,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:21:41,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1455484233, now seen corresponding path program 5 times [2024-11-09 06:21:41,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:21:41,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986725457] [2024-11-09 06:21:41,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:21:41,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:21:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:21:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 12 proven. 93 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 06:21:42,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:21:42,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986725457] [2024-11-09 06:21:42,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986725457] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:21:42,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243940621] [2024-11-09 06:21:42,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:21:42,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:21:42,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:21:42,613 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:21:42,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 06:21:43,026 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-09 06:21:43,026 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:21:43,029 INFO L255 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-09 06:21:43,032 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:21:43,039 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 06:21:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 26 proven. 79 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 06:21:43,451 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:21:44,039 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 26 proven. 79 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 06:21:44,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243940621] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:21:44,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [475446746] [2024-11-09 06:21:44,041 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:21:44,041 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:21:44,041 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:21:44,042 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:21:44,042 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:21:44,780 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:21:46,317 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7426#(and (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)))' at error location [2024-11-09 06:21:46,318 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:21:46,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:21:46,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 40 [2024-11-09 06:21:46,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434523294] [2024-11-09 06:21:46,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:21:46,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-09 06:21:46,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:21:46,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-09 06:21:46,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=2667, Unknown=1, NotChecked=0, Total=2970 [2024-11-09 06:21:46,321 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 41 states, 40 states have (on average 3.925) internal successors, (157), 41 states have internal predecessors, (157), 0 states have call successors, (0), 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 06:21:46,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:21:46,636 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2024-11-09 06:21:46,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 06:21:46,637 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.925) internal successors, (157), 41 states have internal predecessors, (157), 0 states have call successors, (0), 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 66 [2024-11-09 06:21:46,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:21:46,637 INFO L225 Difference]: With dead ends: 81 [2024-11-09 06:21:46,637 INFO L226 Difference]: Without dead ends: 78 [2024-11-09 06:21:46,638 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=322, Invalid=2757, Unknown=1, NotChecked=0, Total=3080 [2024-11-09 06:21:46,638 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:21:46,639 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 138 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:21:46,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-09 06:21:46,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2024-11-09 06:21:46,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 76 states have internal predecessors, (79), 0 states have call successors, (0), 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 06:21:46,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2024-11-09 06:21:46,641 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 66 [2024-11-09 06:21:46,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:21:46,641 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2024-11-09 06:21:46,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.925) internal successors, (157), 41 states have internal predecessors, (157), 0 states have call successors, (0), 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 06:21:46,641 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2024-11-09 06:21:46,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-09 06:21:46,642 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:21:46,642 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:21:46,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-09 06:21:46,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:21:46,844 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:21:46,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:21:46,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1438954375, now seen corresponding path program 10 times [2024-11-09 06:21:46,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:21:46,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414217691] [2024-11-09 06:21:46,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:21:46,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:21:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:21:47,669 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 21 proven. 95 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 06:21:47,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:21:47,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414217691] [2024-11-09 06:21:47,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414217691] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:21:47,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222858150] [2024-11-09 06:21:47,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:21:47,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:21:47,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:21:47,671 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:21:47,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 06:21:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:21:47,824 INFO L255 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-09 06:21:47,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:21:48,014 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 06:21:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 6 proven. 110 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 06:21:48,429 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:21:48,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-09 06:21:48,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-09 06:21:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 6 proven. 110 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-09 06:21:48,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222858150] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:21:48,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1638264927] [2024-11-09 06:21:48,758 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:21:48,758 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:21:48,758 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:21:48,759 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:21:48,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:21:49,493 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:21:51,936 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8042#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_176| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_173| Int)) (and (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_176|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_173|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_176|) 1) (= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_176|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_173|) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_173|)))' at error location [2024-11-09 06:21:51,936 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:21:51,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:21:51,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 20] total 40 [2024-11-09 06:21:51,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296176455] [2024-11-09 06:21:51,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:21:51,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-09 06:21:51,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:21:51,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-09 06:21:51,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2721, Unknown=1, NotChecked=0, Total=2862 [2024-11-09 06:21:51,939 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 40 states, 40 states have (on average 2.975) internal successors, (119), 40 states have internal predecessors, (119), 0 states have call successors, (0), 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 06:21:54,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:21:54,409 INFO L93 Difference]: Finished difference Result 202 states and 205 transitions. [2024-11-09 06:21:54,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-09 06:21:54,410 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.975) internal successors, (119), 40 states have internal predecessors, (119), 0 states have call successors, (0), 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 68 [2024-11-09 06:21:54,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:21:54,410 INFO L225 Difference]: With dead ends: 202 [2024-11-09 06:21:54,411 INFO L226 Difference]: Without dead ends: 87 [2024-11-09 06:21:54,412 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 164 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=301, Invalid=6504, Unknown=1, NotChecked=0, Total=6806 [2024-11-09 06:21:54,412 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 1983 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:21:54,412 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 292 Invalid, 1995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1983 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 06:21:54,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-09 06:21:54,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2024-11-09 06:21:54,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 80 states have (on average 1.0625) internal successors, (85), 82 states have internal predecessors, (85), 0 states have call successors, (0), 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 06:21:54,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2024-11-09 06:21:54,415 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 68 [2024-11-09 06:21:54,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:21:54,416 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2024-11-09 06:21:54,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.975) internal successors, (119), 40 states have internal predecessors, (119), 0 states have call successors, (0), 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 06:21:54,416 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2024-11-09 06:21:54,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-09 06:21:54,416 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:21:54,417 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:21:54,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-09 06:21:54,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:21:54,617 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:21:54,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:21:54,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1388008, now seen corresponding path program 11 times [2024-11-09 06:21:54,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:21:54,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872909282] [2024-11-09 06:21:54,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:21:54,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:21:54,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:21:55,333 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 22 proven. 110 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-09 06:21:55,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:21:55,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872909282] [2024-11-09 06:21:55,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872909282] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:21:55,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157042019] [2024-11-09 06:21:55,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:21:55,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:21:55,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:21:55,336 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:21:55,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 06:21:55,844 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-09 06:21:55,844 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:21:55,848 INFO L255 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-09 06:21:55,849 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:21:56,314 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 40 proven. 92 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-09 06:21:56,314 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:21:56,717 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 06:21:56,924 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 40 proven. 92 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-09 06:21:56,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157042019] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:21:56,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1667295292] [2024-11-09 06:21:56,926 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:21:56,926 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:21:56,926 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:21:56,926 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:21:56,926 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:21:57,825 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:21:59,666 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8879#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_193| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_190| Int)) (and (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_193|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_190|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_190|) (= |v_ULTIMATE.start_cstrcmp_~s1#1.offset_190| (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_193|)) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_193|) 1) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:21:59,666 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:21:59,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:21:59,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 40 [2024-11-09 06:21:59,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054502453] [2024-11-09 06:21:59,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:21:59,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-09 06:21:59,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:21:59,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-09 06:21:59,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=2765, Unknown=1, NotChecked=0, Total=3080 [2024-11-09 06:21:59,669 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 42 states, 41 states have (on average 3.682926829268293) internal successors, (151), 41 states have internal predecessors, (151), 0 states have call successors, (0), 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 06:22:00,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:22:00,116 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2024-11-09 06:22:00,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 06:22:00,117 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.682926829268293) internal successors, (151), 41 states have internal predecessors, (151), 0 states have call successors, (0), 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 74 [2024-11-09 06:22:00,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:22:00,118 INFO L225 Difference]: With dead ends: 92 [2024-11-09 06:22:00,118 INFO L226 Difference]: Without dead ends: 92 [2024-11-09 06:22:00,118 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 172 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=329, Invalid=2862, Unknown=1, NotChecked=0, Total=3192 [2024-11-09 06:22:00,119 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 15 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:22:00,119 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 160 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:22:00,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-09 06:22:00,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2024-11-09 06:22:00,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 82 states have (on average 1.0609756097560976) internal successors, (87), 84 states have internal predecessors, (87), 0 states have call successors, (0), 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 06:22:00,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2024-11-09 06:22:00,122 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 74 [2024-11-09 06:22:00,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:22:00,122 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2024-11-09 06:22:00,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.682926829268293) internal successors, (151), 41 states have internal predecessors, (151), 0 states have call successors, (0), 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 06:22:00,123 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2024-11-09 06:22:00,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-09 06:22:00,124 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:22:00,124 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:22:00,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-09 06:22:00,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:22:00,325 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:22:00,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:22:00,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1600903011, now seen corresponding path program 6 times [2024-11-09 06:22:00,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:22:00,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966039061] [2024-11-09 06:22:00,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:22:00,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:22:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:22:01,196 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 22 proven. 128 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-09 06:22:01,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:22:01,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966039061] [2024-11-09 06:22:01,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966039061] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:22:01,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498018060] [2024-11-09 06:22:01,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:22:01,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:22:01,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:22:01,199 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:22:01,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 06:22:01,539 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:22:01,540 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:22:01,543 INFO L255 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-09 06:22:01,544 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:22:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 35 proven. 115 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-09 06:22:01,868 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:22:02,228 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 5 treesize of output 3 [2024-11-09 06:22:02,382 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 35 proven. 115 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-09 06:22:02,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498018060] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:22:02,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [631153697] [2024-11-09 06:22:02,384 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:22:02,384 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:22:02,384 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:22:02,385 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:22:02,385 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:22:03,251 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:22:04,783 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9562#(and (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)))' at error location [2024-11-09 06:22:04,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:22:04,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:22:04,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 33 [2024-11-09 06:22:04,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443755157] [2024-11-09 06:22:04,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:22:04,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-09 06:22:04,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:22:04,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-09 06:22:04,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=2046, Unknown=1, NotChecked=0, Total=2256 [2024-11-09 06:22:04,786 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 34 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 34 states have internal predecessors, (130), 0 states have call successors, (0), 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 06:22:05,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:22:05,395 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2024-11-09 06:22:05,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 06:22:05,396 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 34 states have internal predecessors, (130), 0 states have call successors, (0), 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 77 [2024-11-09 06:22:05,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:22:05,397 INFO L225 Difference]: With dead ends: 92 [2024-11-09 06:22:05,397 INFO L226 Difference]: Without dead ends: 89 [2024-11-09 06:22:05,397 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 189 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=225, Invalid=2126, Unknown=1, NotChecked=0, Total=2352 [2024-11-09 06:22:05,398 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:22:05,398 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 238 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 06:22:05,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-09 06:22:05,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2024-11-09 06:22:05,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 87 states have internal predecessors, (90), 0 states have call successors, (0), 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 06:22:05,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2024-11-09 06:22:05,402 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 77 [2024-11-09 06:22:05,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:22:05,402 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2024-11-09 06:22:05,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 34 states have internal predecessors, (130), 0 states have call successors, (0), 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 06:22:05,403 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2024-11-09 06:22:05,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-09 06:22:05,404 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:22:05,404 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:22:05,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-09 06:22:05,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:22:05,605 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:22:05,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:22:05,605 INFO L85 PathProgramCache]: Analyzing trace with hash 869537811, now seen corresponding path program 12 times [2024-11-09 06:22:05,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:22:05,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387550153] [2024-11-09 06:22:05,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:22:05,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:22:05,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:22:06,789 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 25 proven. 138 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-09 06:22:06,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:22:06,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387550153] [2024-11-09 06:22:06,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387550153] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:22:06,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459471257] [2024-11-09 06:22:06,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:22:06,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:22:06,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:22:06,794 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:22:06,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 06:22:06,992 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:22:06,992 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:22:06,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-09 06:22:06,997 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:22:07,279 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 06:22:07,822 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 7 proven. 156 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-09 06:22:07,822 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:22:08,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-09 06:22:08,120 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 16 treesize of output 12 [2024-11-09 06:22:08,274 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 7 proven. 156 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-09 06:22:08,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459471257] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:22:08,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [179823244] [2024-11-09 06:22:08,276 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:22:08,276 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:22:08,276 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:22:08,277 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:22:08,277 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:22:09,134 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:22:11,915 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10270#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_214| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_217| Int)) (and (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_214|) (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_217|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_214|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_217|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_214|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_217|) 1) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:22:11,916 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:22:11,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:22:11,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 22] total 44 [2024-11-09 06:22:11,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592562936] [2024-11-09 06:22:11,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:22:11,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-09 06:22:11,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:22:11,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-09 06:22:11,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=3157, Unknown=1, NotChecked=0, Total=3306 [2024-11-09 06:22:11,919 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 44 states have internal predecessors, (135), 0 states have call successors, (0), 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 06:22:15,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:22:15,333 INFO L93 Difference]: Finished difference Result 231 states and 234 transitions. [2024-11-09 06:22:15,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-11-09 06:22:15,334 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 44 states have internal predecessors, (135), 0 states have call successors, (0), 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 79 [2024-11-09 06:22:15,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:22:15,335 INFO L225 Difference]: With dead ends: 231 [2024-11-09 06:22:15,335 INFO L226 Difference]: Without dead ends: 98 [2024-11-09 06:22:15,336 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 195 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=329, Invalid=7860, Unknown=1, NotChecked=0, Total=8190 [2024-11-09 06:22:15,337 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 2718 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 2732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:22:15,337 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 373 Invalid, 2732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2718 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-09 06:22:15,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-09 06:22:15,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2024-11-09 06:22:15,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 91 states have (on average 1.054945054945055) internal successors, (96), 93 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 06:22:15,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2024-11-09 06:22:15,340 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 79 [2024-11-09 06:22:15,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:22:15,340 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2024-11-09 06:22:15,340 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 44 states have internal predecessors, (135), 0 states have call successors, (0), 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 06:22:15,340 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2024-11-09 06:22:15,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-09 06:22:15,341 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:22:15,342 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:22:15,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-09 06:22:15,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-09 06:22:15,542 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:22:15,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:22:15,543 INFO L85 PathProgramCache]: Analyzing trace with hash 44873010, now seen corresponding path program 13 times [2024-11-09 06:22:15,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:22:15,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468920093] [2024-11-09 06:22:15,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:22:15,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:22:15,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:22:16,396 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 35 proven. 147 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-09 06:22:16,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:22:16,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468920093] [2024-11-09 06:22:16,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468920093] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:22:16,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112744051] [2024-11-09 06:22:16,398 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:22:16,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:22:16,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:22:16,400 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:22:16,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-09 06:22:16,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:22:16,631 INFO L255 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-09 06:22:16,633 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:22:17,152 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 51 proven. 131 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-09 06:22:17,153 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:22:17,701 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 5 treesize of output 3 [2024-11-09 06:22:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 51 proven. 131 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-09 06:22:17,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112744051] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:22:17,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [503464527] [2024-11-09 06:22:17,911 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:22:17,911 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:22:17,912 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:22:17,912 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:22:17,912 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:22:18,775 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:22:20,697 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11219#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_233| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_236| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_236|) 1) (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|)) (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_236|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_233|))) (= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_236|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_233|) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_233|) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:22:20,697 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:22:20,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:22:20,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 38 [2024-11-09 06:22:20,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838884831] [2024-11-09 06:22:20,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:22:20,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-09 06:22:20,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:22:20,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-09 06:22:20,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=2606, Unknown=1, NotChecked=0, Total=2862 [2024-11-09 06:22:20,700 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand has 40 states, 39 states have (on average 3.6153846153846154) internal successors, (141), 39 states have internal predecessors, (141), 0 states have call successors, (0), 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 06:22:21,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:22:21,495 INFO L93 Difference]: Finished difference Result 103 states and 106 transitions. [2024-11-09 06:22:21,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 06:22:21,495 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.6153846153846154) internal successors, (141), 39 states have internal predecessors, (141), 0 states have call successors, (0), 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 85 [2024-11-09 06:22:21,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:22:21,496 INFO L225 Difference]: With dead ends: 103 [2024-11-09 06:22:21,496 INFO L226 Difference]: Without dead ends: 103 [2024-11-09 06:22:21,497 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 208 SyntacticMatches, 10 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=272, Invalid=2697, Unknown=1, NotChecked=0, Total=2970 [2024-11-09 06:22:21,497 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:22:21,498 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 309 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 06:22:21,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-09 06:22:21,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2024-11-09 06:22:21,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 93 states have (on average 1.053763440860215) internal successors, (98), 95 states have internal predecessors, (98), 0 states have call successors, (0), 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 06:22:21,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2024-11-09 06:22:21,501 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 85 [2024-11-09 06:22:21,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:22:21,502 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2024-11-09 06:22:21,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.6153846153846154) internal successors, (141), 39 states have internal predecessors, (141), 0 states have call successors, (0), 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 06:22:21,502 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2024-11-09 06:22:21,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-09 06:22:21,503 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:22:21,503 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:22:21,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-09 06:22:21,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-09 06:22:21,704 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:22:21,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:22:21,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1078388233, now seen corresponding path program 7 times [2024-11-09 06:22:21,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:22:21,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752243669] [2024-11-09 06:22:21,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:22:21,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:22:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:22:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 35 proven. 168 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-09 06:22:22,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:22:22,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752243669] [2024-11-09 06:22:22,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752243669] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:22:22,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577568190] [2024-11-09 06:22:22,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:22:22,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:22:22,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:22:22,591 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:22:22,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-09 06:22:22,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:22:22,800 INFO L255 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-09 06:22:22,802 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:22:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 51 proven. 152 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-09 06:22:23,103 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:22:23,448 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 5 treesize of output 3 [2024-11-09 06:22:23,612 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 51 proven. 152 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-09 06:22:23,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577568190] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:22:23,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [236843959] [2024-11-09 06:22:23,614 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:22:23,614 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:22:23,615 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:22:23,615 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:22:23,615 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:22:24,503 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:22:26,395 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11994#(and (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)))' at error location [2024-11-09 06:22:26,395 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:22:26,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:22:26,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 37 [2024-11-09 06:22:26,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366829751] [2024-11-09 06:22:26,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:22:26,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-09 06:22:26,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:22:26,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-09 06:22:26,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=2398, Unknown=0, NotChecked=0, Total=2652 [2024-11-09 06:22:26,397 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 38 states, 37 states have (on average 3.945945945945946) internal successors, (146), 38 states have internal predecessors, (146), 0 states have call successors, (0), 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 06:22:27,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:22:27,148 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2024-11-09 06:22:27,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 06:22:27,149 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 3.945945945945946) internal successors, (146), 38 states have internal predecessors, (146), 0 states have call successors, (0), 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 88 [2024-11-09 06:22:27,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:22:27,150 INFO L225 Difference]: With dead ends: 103 [2024-11-09 06:22:27,150 INFO L226 Difference]: Without dead ends: 100 [2024-11-09 06:22:27,150 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 219 SyntacticMatches, 10 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=272, Invalid=2484, Unknown=0, NotChecked=0, Total=2756 [2024-11-09 06:22:27,151 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 1124 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:22:27,151 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 300 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1124 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 06:22:27,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-09 06:22:27,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2024-11-09 06:22:27,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 98 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:22:27,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2024-11-09 06:22:27,155 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 88 [2024-11-09 06:22:27,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:22:27,155 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2024-11-09 06:22:27,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 3.945945945945946) internal successors, (146), 38 states have internal predecessors, (146), 0 states have call successors, (0), 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 06:22:27,156 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2024-11-09 06:22:27,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-09 06:22:27,157 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:22:27,157 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:22:27,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-09 06:22:27,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:22:27,358 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:22:27,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:22:27,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1244009785, now seen corresponding path program 14 times [2024-11-09 06:22:27,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:22:27,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377084927] [2024-11-09 06:22:27,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:22:27,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:22:27,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:22:28,783 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 29 proven. 189 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-09 06:22:28,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:22:28,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377084927] [2024-11-09 06:22:28,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377084927] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:22:28,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246269081] [2024-11-09 06:22:28,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:22:28,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:22:28,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:22:28,787 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:22:28,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-09 06:22:29,486 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-09 06:22:29,486 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:22:29,491 INFO L255 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-09 06:22:29,493 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:22:29,499 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 06:22:30,005 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 06:22:30,053 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 06:22:30,162 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 29 proven. 189 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-09 06:22:30,163 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:22:30,242 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1161 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1161) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 7 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2024-11-09 06:22:30,253 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:22:30,253 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 23 treesize of output 24 [2024-11-09 06:22:30,261 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:22:30,262 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 32 [2024-11-09 06:22:30,576 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 29 proven. 189 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-09 06:22:30,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246269081] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:22:30,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [210928635] [2024-11-09 06:22:30,578 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:22:30,578 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:22:30,578 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:22:30,579 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:22:30,579 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:22:31,472 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:22:33,881 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12783#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_265| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_268| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_268|) 1) (= |v_ULTIMATE.start_cstrcmp_~s1#1.offset_265| (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_268|)) (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_265|) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_268|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_265|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:22:33,881 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:22:33,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:22:33,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 36 [2024-11-09 06:22:33,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038852321] [2024-11-09 06:22:33,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:22:33,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-09 06:22:33,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:22:33,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-09 06:22:33,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2311, Unknown=2, NotChecked=96, Total=2550 [2024-11-09 06:22:33,883 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand has 37 states, 37 states have (on average 3.054054054054054) internal successors, (113), 36 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:22:35,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:22:35,530 INFO L93 Difference]: Finished difference Result 167 states and 170 transitions. [2024-11-09 06:22:35,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-09 06:22:35,531 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.054054054054054) internal successors, (113), 36 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2024-11-09 06:22:35,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:22:35,532 INFO L225 Difference]: With dead ends: 167 [2024-11-09 06:22:35,532 INFO L226 Difference]: Without dead ends: 104 [2024-11-09 06:22:35,532 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 238 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=185, Invalid=3123, Unknown=2, NotChecked=112, Total=3422 [2024-11-09 06:22:35,533 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 1691 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 1779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:22:35,533 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 453 Invalid, 1779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1691 Invalid, 0 Unknown, 79 Unchecked, 1.2s Time] [2024-11-09 06:22:35,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-09 06:22:35,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2024-11-09 06:22:35,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 99 states have (on average 1.0505050505050506) internal successors, (104), 101 states have internal predecessors, (104), 0 states have call successors, (0), 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 06:22:35,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2024-11-09 06:22:35,536 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 90 [2024-11-09 06:22:35,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:22:35,537 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2024-11-09 06:22:35,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.054054054054054) internal successors, (113), 36 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:22:35,537 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2024-11-09 06:22:35,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-09 06:22:35,538 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:22:35,538 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:22:35,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-09 06:22:35,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-09 06:22:35,739 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:22:35,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:22:35,739 INFO L85 PathProgramCache]: Analyzing trace with hash 688721787, now seen corresponding path program 15 times [2024-11-09 06:22:35,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:22:35,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381607127] [2024-11-09 06:22:35,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:22:35,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:22:35,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:22:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 51 proven. 189 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-09 06:22:36,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:22:36,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381607127] [2024-11-09 06:22:36,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381607127] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:22:36,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537297882] [2024-11-09 06:22:36,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:22:36,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:22:36,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:22:36,777 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:22:36,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-09 06:22:37,045 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:22:37,045 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:22:37,054 INFO L255 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-09 06:22:37,058 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:22:37,397 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 06:22:38,015 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 8 proven. 210 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-09 06:22:38,015 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:22:38,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-09 06:22:38,300 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 16 treesize of output 12 [2024-11-09 06:22:38,427 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 8 proven. 210 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-09 06:22:38,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537297882] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:22:38,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2070032753] [2024-11-09 06:22:38,428 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:22:38,428 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:22:38,428 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:22:38,428 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:22:38,429 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:22:39,438 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:22:42,342 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13683#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_281| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_278| Int)) (and (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_281|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_278|) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_281|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_278|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_281|) 1) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_278|) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:22:42,343 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:22:42,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:22:42,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24, 24] total 48 [2024-11-09 06:22:42,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357184373] [2024-11-09 06:22:42,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:22:42,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-09 06:22:42,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:22:42,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-09 06:22:42,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3597, Unknown=1, NotChecked=0, Total=3782 [2024-11-09 06:22:42,346 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand has 48 states, 48 states have (on average 3.2291666666666665) internal successors, (155), 48 states have internal predecessors, (155), 0 states have call successors, (0), 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 06:22:45,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:22:45,960 INFO L93 Difference]: Finished difference Result 159 states and 162 transitions. [2024-11-09 06:22:45,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-09 06:22:45,961 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.2291666666666665) internal successors, (155), 48 states have internal predecessors, (155), 0 states have call successors, (0), 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 93 [2024-11-09 06:22:45,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:22:45,962 INFO L225 Difference]: With dead ends: 159 [2024-11-09 06:22:45,962 INFO L226 Difference]: Without dead ends: 116 [2024-11-09 06:22:45,963 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 233 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=384, Invalid=8357, Unknown=1, NotChecked=0, Total=8742 [2024-11-09 06:22:45,963 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 3186 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 3195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 3186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:22:45,964 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 378 Invalid, 3195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 3186 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-09 06:22:45,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-11-09 06:22:45,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 107. [2024-11-09 06:22:45,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 104 states have (on average 1.0480769230769231) internal successors, (109), 106 states have internal predecessors, (109), 0 states have call successors, (0), 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 06:22:45,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2024-11-09 06:22:45,968 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 93 [2024-11-09 06:22:45,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:22:45,968 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2024-11-09 06:22:45,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.2291666666666665) internal successors, (155), 48 states have internal predecessors, (155), 0 states have call successors, (0), 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 06:22:45,968 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2024-11-09 06:22:45,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-09 06:22:45,969 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:22:45,969 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:22:45,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-09 06:22:46,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:22:46,170 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:22:46,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:22:46,172 INFO L85 PathProgramCache]: Analyzing trace with hash -710753117, now seen corresponding path program 8 times [2024-11-09 06:22:46,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:22:46,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393413992] [2024-11-09 06:22:46,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:22:46,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:22:46,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:22:47,211 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 51 proven. 213 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-09 06:22:47,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:22:47,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393413992] [2024-11-09 06:22:47,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393413992] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:22:47,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627744899] [2024-11-09 06:22:47,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:22:47,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:22:47,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:22:47,215 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:22:47,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-09 06:22:48,668 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-09 06:22:48,669 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:22:48,677 INFO L255 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-09 06:22:48,680 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:22:48,685 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 06:22:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 77 proven. 187 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-09 06:22:49,310 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:22:50,401 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 77 proven. 187 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-09 06:22:50,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627744899] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:22:50,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1730790588] [2024-11-09 06:22:50,403 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:22:50,403 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:22:50,403 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:22:50,403 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:22:50,404 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:22:51,433 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:22:53,598 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14674#(and (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)))' at error location [2024-11-09 06:22:53,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:22:53,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:22:53,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 58 [2024-11-09 06:22:53,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705499838] [2024-11-09 06:22:53,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:22:53,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-09 06:22:53,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:22:53,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-09 06:22:53,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=4540, Unknown=1, NotChecked=0, Total=5112 [2024-11-09 06:22:53,601 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand has 59 states, 58 states have (on average 3.9482758620689653) internal successors, (229), 59 states have internal predecessors, (229), 0 states have call successors, (0), 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 06:22:54,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:22:54,468 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2024-11-09 06:22:54,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 06:22:54,469 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 3.9482758620689653) internal successors, (229), 59 states have internal predecessors, (229), 0 states have call successors, (0), 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 99 [2024-11-09 06:22:54,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:22:54,469 INFO L225 Difference]: With dead ends: 114 [2024-11-09 06:22:54,469 INFO L226 Difference]: Without dead ends: 111 [2024-11-09 06:22:54,470 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 242 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2383 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=600, Invalid=4655, Unknown=1, NotChecked=0, Total=5256 [2024-11-09 06:22:54,470 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 7 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:22:54,470 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 297 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1184 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 06:22:54,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-11-09 06:22:54,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2024-11-09 06:22:54,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 107 states have (on average 1.0467289719626167) internal successors, (112), 109 states have internal predecessors, (112), 0 states have call successors, (0), 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 06:22:54,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2024-11-09 06:22:54,477 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 99 [2024-11-09 06:22:54,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:22:54,478 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2024-11-09 06:22:54,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 3.9482758620689653) internal successors, (229), 59 states have internal predecessors, (229), 0 states have call successors, (0), 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 06:22:54,478 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2024-11-09 06:22:54,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2024-11-09 06:22:54,479 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:22:54,479 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:22:54,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-09 06:22:54,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-09 06:22:54,681 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:22:54,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:22:54,681 INFO L85 PathProgramCache]: Analyzing trace with hash -133909165, now seen corresponding path program 16 times [2024-11-09 06:22:54,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:22:54,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836296696] [2024-11-09 06:22:54,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:22:54,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:22:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:22:56,192 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 33 proven. 248 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-09 06:22:56,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:22:56,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836296696] [2024-11-09 06:22:56,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836296696] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:22:56,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327371181] [2024-11-09 06:22:56,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:22:56,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:22:56,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:22:56,198 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:22:56,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-09 06:22:56,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:22:56,483 INFO L255 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-09 06:22:56,485 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:22:56,992 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 06:22:57,749 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 9 proven. 272 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-09 06:22:57,749 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:22:58,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-09 06:22:58,066 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 16 treesize of output 12 [2024-11-09 06:22:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 9 proven. 272 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-11-09 06:22:58,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327371181] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:22:58,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1742128378] [2024-11-09 06:22:58,210 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:22:58,211 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:22:58,211 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:22:58,211 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:22:58,211 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:22:58,891 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:23:01,911 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15565#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_309| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_306| Int)) (and (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_309|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_306|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_309|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_306|) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_306|) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1) (= 1 (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_309|))))' at error location [2024-11-09 06:23:01,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:23:01,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:23:01,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26, 26] total 52 [2024-11-09 06:23:01,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810712639] [2024-11-09 06:23:01,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:23:01,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-09 06:23:01,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:23:01,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-09 06:23:01,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=4126, Unknown=0, NotChecked=0, Total=4290 [2024-11-09 06:23:01,914 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand has 52 states, 52 states have (on average 3.2115384615384617) internal successors, (167), 52 states have internal predecessors, (167), 0 states have call successors, (0), 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 06:23:06,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:23:06,140 INFO L93 Difference]: Finished difference Result 289 states and 292 transitions. [2024-11-09 06:23:06,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2024-11-09 06:23:06,140 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.2115384615384617) internal successors, (167), 52 states have internal predecessors, (167), 0 states have call successors, (0), 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 101 [2024-11-09 06:23:06,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:23:06,141 INFO L225 Difference]: With dead ends: 289 [2024-11-09 06:23:06,141 INFO L226 Difference]: Without dead ends: 120 [2024-11-09 06:23:06,144 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 257 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=384, Invalid=10958, Unknown=0, NotChecked=0, Total=11342 [2024-11-09 06:23:06,145 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 4310 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 4327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 4310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:23:06,145 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 549 Invalid, 4327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 4310 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-09 06:23:06,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-09 06:23:06,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2024-11-09 06:23:06,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 113 states have (on average 1.0442477876106195) internal successors, (118), 115 states have internal predecessors, (118), 0 states have call successors, (0), 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 06:23:06,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2024-11-09 06:23:06,149 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 101 [2024-11-09 06:23:06,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:23:06,149 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2024-11-09 06:23:06,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.2115384615384617) internal successors, (167), 52 states have internal predecessors, (167), 0 states have call successors, (0), 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 06:23:06,151 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2024-11-09 06:23:06,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-09 06:23:06,152 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:23:06,152 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:23:06,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-09 06:23:06,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-09 06:23:06,353 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:23:06,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:23:06,353 INFO L85 PathProgramCache]: Analyzing trace with hash -2046901134, now seen corresponding path program 17 times [2024-11-09 06:23:06,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:23:06,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275797294] [2024-11-09 06:23:06,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:06,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:23:06,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:07,531 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 70 proven. 236 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-11-09 06:23:07,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:23:07,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275797294] [2024-11-09 06:23:07,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275797294] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:23:07,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092249857] [2024-11-09 06:23:07,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:23:07,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:23:07,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:23:07,534 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:23:07,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-09 06:23:08,867 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-09 06:23:08,867 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:23:08,872 INFO L255 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-09 06:23:08,875 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:23:08,881 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 06:23:08,890 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 13 treesize of output 1 [2024-11-09 06:23:10,015 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 100 proven. 206 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-11-09 06:23:10,015 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:23:11,635 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 100 proven. 206 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-11-09 06:23:11,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092249857] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:23:11,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1834407535] [2024-11-09 06:23:11,637 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:23:11,637 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:23:11,637 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:23:11,637 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:23:11,638 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:23:12,519 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:23:15,150 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16769#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_332| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_329| Int)) (and (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_332|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_329|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_332|) 1) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_329|) (= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_332|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_329|) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:23:15,150 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:23:15,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:23:15,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 65 [2024-11-09 06:23:15,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557847204] [2024-11-09 06:23:15,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:23:15,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-09 06:23:15,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:23:15,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-09 06:23:15,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=627, Invalid=5852, Unknown=1, NotChecked=0, Total=6480 [2024-11-09 06:23:15,153 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand has 67 states, 66 states have (on average 3.772727272727273) internal successors, (249), 66 states have internal predecessors, (249), 0 states have call successors, (0), 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 06:23:16,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:23:16,403 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2024-11-09 06:23:16,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-09 06:23:16,404 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 3.772727272727273) internal successors, (249), 66 states have internal predecessors, (249), 0 states have call successors, (0), 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 107 [2024-11-09 06:23:16,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:23:16,405 INFO L225 Difference]: With dead ends: 125 [2024-11-09 06:23:16,405 INFO L226 Difference]: Without dead ends: 125 [2024-11-09 06:23:16,406 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 259 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2714 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=941, Invalid=8370, Unknown=1, NotChecked=0, Total=9312 [2024-11-09 06:23:16,406 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 23 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:23:16,407 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 215 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 06:23:16,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-09 06:23:16,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 118. [2024-11-09 06:23:16,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 117 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:23:16,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2024-11-09 06:23:16,410 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 107 [2024-11-09 06:23:16,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:23:16,411 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2024-11-09 06:23:16,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 3.772727272727273) internal successors, (249), 66 states have internal predecessors, (249), 0 states have call successors, (0), 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 06:23:16,411 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2024-11-09 06:23:16,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-09 06:23:16,412 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:23:16,412 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:23:16,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-09 06:23:16,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:23:16,613 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:23:16,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:23:16,614 INFO L85 PathProgramCache]: Analyzing trace with hash 715361993, now seen corresponding path program 9 times [2024-11-09 06:23:16,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:23:16,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778987862] [2024-11-09 06:23:16,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:16,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:23:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:17,835 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 70 proven. 263 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-11-09 06:23:17,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:23:17,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778987862] [2024-11-09 06:23:17,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778987862] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:23:17,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452022261] [2024-11-09 06:23:17,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:23:17,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:23:17,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:23:17,842 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:23:17,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-09 06:23:18,717 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:23:18,718 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:23:18,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-09 06:23:18,724 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:23:19,225 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 92 proven. 241 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-11-09 06:23:19,225 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:23:19,794 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 5 treesize of output 3 [2024-11-09 06:23:20,020 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 92 proven. 241 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-11-09 06:23:20,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452022261] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:23:20,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1630957570] [2024-11-09 06:23:20,022 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:23:20,022 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:23:20,023 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:23:20,023 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:23:20,023 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:23:20,820 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:23:22,868 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17758#(and (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)))' at error location [2024-11-09 06:23:22,868 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:23:22,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:23:22,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 45 [2024-11-09 06:23:22,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264885451] [2024-11-09 06:23:22,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:23:22,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-09 06:23:22,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:23:22,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-09 06:23:22,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=3087, Unknown=1, NotChecked=0, Total=3422 [2024-11-09 06:23:22,872 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand has 46 states, 45 states have (on average 3.9555555555555557) internal successors, (178), 46 states have internal predecessors, (178), 0 states have call successors, (0), 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 06:23:23,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:23:23,784 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2024-11-09 06:23:23,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-09 06:23:23,785 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.9555555555555557) internal successors, (178), 46 states have internal predecessors, (178), 0 states have call successors, (0), 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 110 [2024-11-09 06:23:23,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:23:23,785 INFO L225 Difference]: With dead ends: 125 [2024-11-09 06:23:23,786 INFO L226 Difference]: Without dead ends: 122 [2024-11-09 06:23:23,786 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 280 SyntacticMatches, 12 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=356, Invalid=3183, Unknown=1, NotChecked=0, Total=3540 [2024-11-09 06:23:23,786 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:23:23,787 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 317 Invalid, 1285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 06:23:23,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-09 06:23:23,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2024-11-09 06:23:23,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 118 states have (on average 1.0423728813559323) internal successors, (123), 120 states have internal predecessors, (123), 0 states have call successors, (0), 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 06:23:23,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2024-11-09 06:23:23,790 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 110 [2024-11-09 06:23:23,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:23:23,790 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2024-11-09 06:23:23,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.9555555555555557) internal successors, (178), 46 states have internal predecessors, (178), 0 states have call successors, (0), 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 06:23:23,790 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2024-11-09 06:23:23,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-09 06:23:23,791 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:23:23,791 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:23:23,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-09 06:23:23,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:23:23,992 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:23:23,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:23:23,992 INFO L85 PathProgramCache]: Analyzing trace with hash 268144121, now seen corresponding path program 18 times [2024-11-09 06:23:23,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:23:23,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722132654] [2024-11-09 06:23:23,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:23,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:23:24,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:25,390 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 37 proven. 315 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-11-09 06:23:25,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:23:25,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722132654] [2024-11-09 06:23:25,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722132654] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:23:25,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18234877] [2024-11-09 06:23:25,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:23:25,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:23:25,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:23:25,392 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:23:25,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-09 06:23:25,657 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:23:25,657 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:23:25,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-09 06:23:25,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:23:26,120 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 06:23:26,943 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 10 proven. 342 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-11-09 06:23:26,943 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:23:27,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-09 06:23:27,314 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 16 treesize of output 12 [2024-11-09 06:23:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 10 proven. 342 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-11-09 06:23:27,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18234877] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:23:27,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1171900869] [2024-11-09 06:23:27,498 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:23:27,499 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:23:27,499 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:23:27,499 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:23:27,499 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:23:28,356 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:23:31,498 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18741#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_359| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_362| Int)) (and (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_362|) 1) (= |v_ULTIMATE.start_cstrcmp_~s1#1.offset_359| (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_362|)) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_359|) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_362|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_359|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:23:31,498 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:23:31,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:23:31,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 28, 28] total 56 [2024-11-09 06:23:31,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726359703] [2024-11-09 06:23:31,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:23:31,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-09 06:23:31,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:23:31,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-09 06:23:31,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=4658, Unknown=1, NotChecked=0, Total=4830 [2024-11-09 06:23:31,501 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand has 56 states, 56 states have (on average 3.267857142857143) internal successors, (183), 56 states have internal predecessors, (183), 0 states have call successors, (0), 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 06:23:37,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:23:37,265 INFO L93 Difference]: Finished difference Result 318 states and 321 transitions. [2024-11-09 06:23:37,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2024-11-09 06:23:37,266 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.267857142857143) internal successors, (183), 56 states have internal predecessors, (183), 0 states have call successors, (0), 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 112 [2024-11-09 06:23:37,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:23:37,267 INFO L225 Difference]: With dead ends: 318 [2024-11-09 06:23:37,267 INFO L226 Difference]: Without dead ends: 131 [2024-11-09 06:23:37,268 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 288 SyntacticMatches, 3 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1795 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=411, Invalid=12698, Unknown=1, NotChecked=0, Total=13110 [2024-11-09 06:23:37,269 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 5475 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 5494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 5475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:23:37,269 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 684 Invalid, 5494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 5475 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-11-09 06:23:37,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-11-09 06:23:37,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2024-11-09 06:23:37,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 124 states have (on average 1.0403225806451613) internal successors, (129), 126 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 06:23:37,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2024-11-09 06:23:37,275 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 112 [2024-11-09 06:23:37,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:23:37,275 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2024-11-09 06:23:37,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.267857142857143) internal successors, (183), 56 states have internal predecessors, (183), 0 states have call successors, (0), 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 06:23:37,278 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2024-11-09 06:23:37,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-11-09 06:23:37,279 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:23:37,279 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:23:37,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-09 06:23:37,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-11-09 06:23:37,480 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:23:37,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:23:37,480 INFO L85 PathProgramCache]: Analyzing trace with hash -2124302440, now seen corresponding path program 19 times [2024-11-09 06:23:37,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:23:37,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671523852] [2024-11-09 06:23:37,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:37,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:23:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 92 proven. 288 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-09 06:23:38,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:23:38,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671523852] [2024-11-09 06:23:38,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671523852] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:23:38,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343370519] [2024-11-09 06:23:38,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:23:38,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:23:38,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:23:38,407 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:23:38,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-09 06:23:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:38,650 INFO L255 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-09 06:23:38,651 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:23:39,186 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 117 proven. 263 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-09 06:23:39,186 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:23:39,842 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 5 treesize of output 3 [2024-11-09 06:23:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 117 proven. 263 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-09 06:23:40,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343370519] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:23:40,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1454762860] [2024-11-09 06:23:40,129 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:23:40,129 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:23:40,130 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:23:40,130 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:23:40,130 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:23:40,807 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:23:42,942 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20044#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_385| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_388| Int)) (and (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_385|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_388|) 1) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_388|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_385|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_388|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_385|) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:23:42,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:23:42,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:23:42,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 50 [2024-11-09 06:23:42,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479850795] [2024-11-09 06:23:42,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:23:42,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-09 06:23:42,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:23:42,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-09 06:23:42,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=3915, Unknown=0, NotChecked=0, Total=4290 [2024-11-09 06:23:42,945 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand has 52 states, 51 states have (on average 3.7058823529411766) internal successors, (189), 51 states have internal predecessors, (189), 0 states have call successors, (0), 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 06:23:44,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:23:44,039 INFO L93 Difference]: Finished difference Result 136 states and 139 transitions. [2024-11-09 06:23:44,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 06:23:44,039 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 3.7058823529411766) internal successors, (189), 51 states have internal predecessors, (189), 0 states have call successors, (0), 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 118 [2024-11-09 06:23:44,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:23:44,040 INFO L225 Difference]: With dead ends: 136 [2024-11-09 06:23:44,040 INFO L226 Difference]: Without dead ends: 136 [2024-11-09 06:23:44,041 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 298 SyntacticMatches, 13 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=398, Invalid=4024, Unknown=0, NotChecked=0, Total=4422 [2024-11-09 06:23:44,041 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 22 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 1892 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 1893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:23:44,041 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 427 Invalid, 1893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1892 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 06:23:44,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-09 06:23:44,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 129. [2024-11-09 06:23:44,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 126 states have (on average 1.0396825396825398) internal successors, (131), 128 states have internal predecessors, (131), 0 states have call successors, (0), 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 06:23:44,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2024-11-09 06:23:44,043 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 118 [2024-11-09 06:23:44,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:23:44,043 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2024-11-09 06:23:44,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 3.7058823529411766) internal successors, (189), 51 states have internal predecessors, (189), 0 states have call successors, (0), 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 06:23:44,044 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2024-11-09 06:23:44,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-11-09 06:23:44,044 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:23:44,044 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:23:44,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-09 06:23:44,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-09 06:23:44,245 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:23:44,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:23:44,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1250492899, now seen corresponding path program 10 times [2024-11-09 06:23:44,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:23:44,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081734353] [2024-11-09 06:23:44,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:44,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:23:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:45,569 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 92 proven. 318 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-09 06:23:45,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:23:45,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081734353] [2024-11-09 06:23:45,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081734353] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:23:45,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463153458] [2024-11-09 06:23:45,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:23:45,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:23:45,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:23:45,572 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:23:45,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-09 06:23:45,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:45,876 INFO L255 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-09 06:23:45,880 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:23:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 117 proven. 293 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-09 06:23:46,467 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:23:47,126 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 5 treesize of output 3 [2024-11-09 06:23:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 117 proven. 293 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-09 06:23:47,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463153458] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:23:47,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1658429109] [2024-11-09 06:23:47,434 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:23:47,434 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:23:47,434 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:23:47,435 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:23:47,435 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:23:48,225 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:23:50,153 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21095#(and (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)))' at error location [2024-11-09 06:23:50,154 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:23:50,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:23:50,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 49 [2024-11-09 06:23:50,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620553970] [2024-11-09 06:23:50,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:23:50,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-09 06:23:50,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:23:50,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-09 06:23:50,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=3523, Unknown=1, NotChecked=0, Total=3906 [2024-11-09 06:23:50,156 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand has 50 states, 49 states have (on average 3.9591836734693877) internal successors, (194), 50 states have internal predecessors, (194), 0 states have call successors, (0), 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 06:23:51,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:23:51,177 INFO L93 Difference]: Finished difference Result 136 states and 138 transitions. [2024-11-09 06:23:51,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 06:23:51,178 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 3.9591836734693877) internal successors, (194), 50 states have internal predecessors, (194), 0 states have call successors, (0), 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 121 [2024-11-09 06:23:51,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:23:51,179 INFO L225 Difference]: With dead ends: 136 [2024-11-09 06:23:51,179 INFO L226 Difference]: Without dead ends: 133 [2024-11-09 06:23:51,180 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 310 SyntacticMatches, 13 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2054 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=406, Invalid=3625, Unknown=1, NotChecked=0, Total=4032 [2024-11-09 06:23:51,180 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 1585 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 06:23:51,180 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 389 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1585 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 06:23:51,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-11-09 06:23:51,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2024-11-09 06:23:51,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 129 states have (on average 1.0387596899224807) internal successors, (134), 131 states have internal predecessors, (134), 0 states have call successors, (0), 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 06:23:51,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2024-11-09 06:23:51,185 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 121 [2024-11-09 06:23:51,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:23:51,185 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2024-11-09 06:23:51,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 3.9591836734693877) internal successors, (194), 50 states have internal predecessors, (194), 0 states have call successors, (0), 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 06:23:51,186 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2024-11-09 06:23:51,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 06:23:51,187 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:23:51,187 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:23:51,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-11-09 06:23:51,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-09 06:23:51,388 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:23:51,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:23:51,388 INFO L85 PathProgramCache]: Analyzing trace with hash -867130733, now seen corresponding path program 20 times [2024-11-09 06:23:51,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:23:51,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534742428] [2024-11-09 06:23:51,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:23:51,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:23:51,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:23:53,327 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 41 proven. 390 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-09 06:23:53,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:23:53,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534742428] [2024-11-09 06:23:53,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534742428] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:23:53,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588674619] [2024-11-09 06:23:53,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:23:53,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:23:53,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:23:53,329 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:23:53,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-09 06:23:56,139 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-09 06:23:56,139 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:23:56,148 INFO L255 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-09 06:23:56,153 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:23:56,682 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 06:23:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 11 proven. 420 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-09 06:23:57,660 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:23:58,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-09 06:23:58,063 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 16 treesize of output 12 [2024-11-09 06:23:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 11 proven. 420 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-09 06:23:58,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588674619] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:23:58,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [496840106] [2024-11-09 06:23:58,244 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:23:58,244 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:23:58,244 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:23:58,245 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:23:58,245 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:23:59,013 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:24:02,646 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22170#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_419| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_416| Int)) (and (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_419|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_416|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_419|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_416|) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_416|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_419|) 1) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:24:02,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:24:02,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:24:02,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30, 30] total 60 [2024-11-09 06:24:02,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324934093] [2024-11-09 06:24:02,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:24:02,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-09 06:24:02,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:24:02,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-09 06:24:02,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=5082, Unknown=1, NotChecked=0, Total=5256 [2024-11-09 06:24:02,650 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand has 60 states, 60 states have (on average 3.3) internal successors, (198), 60 states have internal predecessors, (198), 0 states have call successors, (0), 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 06:24:09,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:24:09,175 INFO L93 Difference]: Finished difference Result 347 states and 350 transitions. [2024-11-09 06:24:09,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2024-11-09 06:24:09,175 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.3) internal successors, (198), 60 states have internal predecessors, (198), 0 states have call successors, (0), 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 123 [2024-11-09 06:24:09,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:24:09,176 INFO L225 Difference]: With dead ends: 347 [2024-11-09 06:24:09,176 INFO L226 Difference]: Without dead ends: 142 [2024-11-09 06:24:09,176 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 320 SyntacticMatches, 3 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1910 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=433, Invalid=14328, Unknown=1, NotChecked=0, Total=14762 [2024-11-09 06:24:09,177 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 6025 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 6049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 6025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:24:09,177 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 745 Invalid, 6049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 6025 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-11-09 06:24:09,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-09 06:24:09,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2024-11-09 06:24:09,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 135 states have (on average 1.037037037037037) internal successors, (140), 137 states have internal predecessors, (140), 0 states have call successors, (0), 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 06:24:09,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2024-11-09 06:24:09,180 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 123 [2024-11-09 06:24:09,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:24:09,180 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2024-11-09 06:24:09,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.3) internal successors, (198), 60 states have internal predecessors, (198), 0 states have call successors, (0), 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 06:24:09,181 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2024-11-09 06:24:09,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-11-09 06:24:09,182 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:24:09,182 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:24:09,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-09 06:24:09,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:24:09,382 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:24:09,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:24:09,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1572610994, now seen corresponding path program 21 times [2024-11-09 06:24:09,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:24:09,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575492286] [2024-11-09 06:24:09,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:24:09,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:24:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:24:10,705 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 117 proven. 345 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-11-09 06:24:10,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:24:10,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575492286] [2024-11-09 06:24:10,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575492286] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:24:10,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540471877] [2024-11-09 06:24:10,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:24:10,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:24:10,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:24:10,708 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:24:10,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-09 06:24:12,336 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:24:12,336 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:24:12,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-09 06:24:12,345 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:24:13,318 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 145 proven. 317 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-11-09 06:24:13,319 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:24:14,093 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 06:24:14,905 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 145 proven. 317 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-11-09 06:24:14,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540471877] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:24:14,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [471462188] [2024-11-09 06:24:14,907 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:24:14,907 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:24:14,907 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:24:14,907 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:24:14,908 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:24:15,990 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:24:19,049 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23600#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_444| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_447| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_447|) 1) (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_444|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_447|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_444|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_447|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_444|) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:24:19,049 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:24:19,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:24:19,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 64 [2024-11-09 06:24:19,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692305501] [2024-11-09 06:24:19,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:24:19,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-09 06:24:19,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:24:19,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-09 06:24:19,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=644, Invalid=5675, Unknown=1, NotChecked=0, Total=6320 [2024-11-09 06:24:19,052 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand has 66 states, 65 states have (on average 3.7846153846153845) internal successors, (246), 65 states have internal predecessors, (246), 0 states have call successors, (0), 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 06:24:20,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:24:20,200 INFO L93 Difference]: Finished difference Result 147 states and 150 transitions. [2024-11-09 06:24:20,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-09 06:24:20,201 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 3.7846153846153845) internal successors, (246), 65 states have internal predecessors, (246), 0 states have call successors, (0), 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 129 [2024-11-09 06:24:20,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:24:20,202 INFO L225 Difference]: With dead ends: 147 [2024-11-09 06:24:20,202 INFO L226 Difference]: Without dead ends: 147 [2024-11-09 06:24:20,202 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 330 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2526 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=681, Invalid=5798, Unknown=1, NotChecked=0, Total=6480 [2024-11-09 06:24:20,203 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 15 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 1760 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:24:20,203 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 336 Invalid, 1761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1760 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 06:24:20,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-09 06:24:20,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 140. [2024-11-09 06:24:20,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 137 states have (on average 1.0364963503649636) internal successors, (142), 139 states have internal predecessors, (142), 0 states have call successors, (0), 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 06:24:20,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2024-11-09 06:24:20,207 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 129 [2024-11-09 06:24:20,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:24:20,208 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2024-11-09 06:24:20,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 3.7846153846153845) internal successors, (246), 65 states have internal predecessors, (246), 0 states have call successors, (0), 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 06:24:20,209 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2024-11-09 06:24:20,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-11-09 06:24:20,209 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:24:20,210 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:24:20,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-09 06:24:20,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-09 06:24:20,412 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:24:20,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:24:20,413 INFO L85 PathProgramCache]: Analyzing trace with hash 152233865, now seen corresponding path program 11 times [2024-11-09 06:24:20,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:24:20,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400413172] [2024-11-09 06:24:20,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:24:20,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:24:20,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:24:21,849 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 117 proven. 378 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-11-09 06:24:21,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:24:21,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400413172] [2024-11-09 06:24:21,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400413172] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:24:21,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652548448] [2024-11-09 06:24:21,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:24:21,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:24:21,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:24:21,851 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:24:21,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-09 06:24:28,088 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-09 06:24:28,088 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:24:28,097 INFO L255 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-09 06:24:28,100 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:24:28,938 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 155 proven. 340 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-11-09 06:24:28,938 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:24:29,847 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 7 treesize of output 5 [2024-11-09 06:24:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 155 proven. 340 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-11-09 06:24:30,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652548448] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:24:30,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [277345854] [2024-11-09 06:24:30,189 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:24:30,189 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:24:30,190 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:24:30,190 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:24:30,190 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:24:31,352 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:24:33,537 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24754#(and (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)))' at error location [2024-11-09 06:24:33,537 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:24:33,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:24:33,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 64 [2024-11-09 06:24:33,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113402353] [2024-11-09 06:24:33,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:24:33,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-09 06:24:33,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:24:33,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-09 06:24:33,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=718, Invalid=5287, Unknown=1, NotChecked=0, Total=6006 [2024-11-09 06:24:33,540 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand has 65 states, 64 states have (on average 4.125) internal successors, (264), 65 states have internal predecessors, (264), 0 states have call successors, (0), 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 06:24:34,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:24:34,505 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2024-11-09 06:24:34,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-09 06:24:34,506 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 4.125) internal successors, (264), 65 states have internal predecessors, (264), 0 states have call successors, (0), 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 132 [2024-11-09 06:24:34,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:24:34,506 INFO L225 Difference]: With dead ends: 147 [2024-11-09 06:24:34,506 INFO L226 Difference]: Without dead ends: 144 [2024-11-09 06:24:34,507 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 329 SyntacticMatches, 14 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3315 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=744, Invalid=5417, Unknown=1, NotChecked=0, Total=6162 [2024-11-09 06:24:34,507 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 1522 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 06:24:34,508 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 338 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1522 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 06:24:34,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-11-09 06:24:34,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2024-11-09 06:24:34,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 140 states have (on average 1.0357142857142858) internal successors, (145), 142 states have internal predecessors, (145), 0 states have call successors, (0), 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 06:24:34,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2024-11-09 06:24:34,512 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 132 [2024-11-09 06:24:34,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:24:34,512 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2024-11-09 06:24:34,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 4.125) internal successors, (264), 65 states have internal predecessors, (264), 0 states have call successors, (0), 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 06:24:34,513 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2024-11-09 06:24:34,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-09 06:24:34,513 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:24:34,513 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:24:34,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-11-09 06:24:34,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-09 06:24:34,714 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:24:34,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:24:34,714 INFO L85 PathProgramCache]: Analyzing trace with hash 267892409, now seen corresponding path program 22 times [2024-11-09 06:24:34,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:24:34,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219877500] [2024-11-09 06:24:34,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:24:34,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:24:34,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:24:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 45 proven. 473 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-11-09 06:24:36,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:24:36,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219877500] [2024-11-09 06:24:36,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219877500] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:24:36,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225119283] [2024-11-09 06:24:36,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:24:36,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:24:36,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:24:36,858 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:24:36,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-09 06:24:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:24:37,229 INFO L255 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-11-09 06:24:37,232 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:24:37,866 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 06:24:39,018 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 12 proven. 506 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-11-09 06:24:39,018 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:24:39,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-09 06:24:39,493 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 16 treesize of output 12 [2024-11-09 06:24:39,715 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 12 proven. 506 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-11-09 06:24:39,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225119283] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:24:39,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [288706322] [2024-11-09 06:24:39,717 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:24:39,717 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:24:39,717 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:24:39,717 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:24:39,717 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:24:40,719 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:24:44,710 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25921#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_480| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_477| Int)) (and (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_477|) (= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_480|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_477|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_480|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_477|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_480|) 1) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:24:44,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:24:44,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:24:44,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32, 32] total 64 [2024-11-09 06:24:44,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379185488] [2024-11-09 06:24:44,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:24:44,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-09 06:24:44,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:24:44,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-09 06:24:44,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=5817, Unknown=1, NotChecked=0, Total=6006 [2024-11-09 06:24:44,713 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand has 64 states, 64 states have (on average 3.359375) internal successors, (215), 64 states have internal predecessors, (215), 0 states have call successors, (0), 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 06:24:52,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:24:52,194 INFO L93 Difference]: Finished difference Result 376 states and 379 transitions. [2024-11-09 06:24:52,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2024-11-09 06:24:52,195 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.359375) internal successors, (215), 64 states have internal predecessors, (215), 0 states have call successors, (0), 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 134 [2024-11-09 06:24:52,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:24:52,196 INFO L225 Difference]: With dead ends: 376 [2024-11-09 06:24:52,196 INFO L226 Difference]: Without dead ends: 153 [2024-11-09 06:24:52,198 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 350 SyntacticMatches, 3 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2273 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=469, Invalid=16560, Unknown=1, NotChecked=0, Total=17030 [2024-11-09 06:24:52,199 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 37 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 7519 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 7542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 7519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:24:52,199 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 911 Invalid, 7542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 7519 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-11-09 06:24:52,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-11-09 06:24:52,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 149. [2024-11-09 06:24:52,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 146 states have (on average 1.0342465753424657) internal successors, (151), 148 states have internal predecessors, (151), 0 states have call successors, (0), 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 06:24:52,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2024-11-09 06:24:52,204 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 134 [2024-11-09 06:24:52,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:24:52,204 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2024-11-09 06:24:52,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.359375) internal successors, (215), 64 states have internal predecessors, (215), 0 states have call successors, (0), 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 06:24:52,204 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2024-11-09 06:24:52,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-11-09 06:24:52,205 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:24:52,206 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:24:52,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-11-09 06:24:52,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-09 06:24:52,406 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:24:52,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:24:52,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1250610600, now seen corresponding path program 23 times [2024-11-09 06:24:52,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:24:52,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184275898] [2024-11-09 06:24:52,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:24:52,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:24:52,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:24:53,821 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 145 proven. 407 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 06:24:53,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:24:53,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184275898] [2024-11-09 06:24:53,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184275898] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:24:53,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412237175] [2024-11-09 06:24:53,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:24:53,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:24:53,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:24:53,823 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:24:53,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-09 06:24:57,454 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-09 06:24:57,454 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:24:57,462 INFO L255 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-09 06:24:57,466 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:24:58,708 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 187 proven. 365 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 06:24:58,708 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:24:59,847 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 7 treesize of output 5 [2024-11-09 06:25:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 187 proven. 365 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 06:25:00,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412237175] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:25:00,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [229145696] [2024-11-09 06:25:00,340 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:25:00,340 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:25:00,340 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:25:00,340 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:25:00,340 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:25:01,403 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:25:04,310 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27472#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_509| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_506| Int)) (and (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_509|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_506|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_506|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_509|) 1) (= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_509|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_506|) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:25:04,310 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:25:04,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:25:04,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 70 [2024-11-09 06:25:04,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823204547] [2024-11-09 06:25:04,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:25:04,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-11-09 06:25:04,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:25:04,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-11-09 06:25:04,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=830, Invalid=6479, Unknown=1, NotChecked=0, Total=7310 [2024-11-09 06:25:04,313 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand has 72 states, 71 states have (on average 3.9014084507042255) internal successors, (277), 71 states have internal predecessors, (277), 0 states have call successors, (0), 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 06:25:05,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:25:05,440 INFO L93 Difference]: Finished difference Result 158 states and 161 transitions. [2024-11-09 06:25:05,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-09 06:25:05,441 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 3.9014084507042255) internal successors, (277), 71 states have internal predecessors, (277), 0 states have call successors, (0), 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 140 [2024-11-09 06:25:05,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:25:05,442 INFO L225 Difference]: With dead ends: 158 [2024-11-09 06:25:05,442 INFO L226 Difference]: Without dead ends: 158 [2024-11-09 06:25:05,443 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 346 SyntacticMatches, 15 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3851 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=857, Invalid=6624, Unknown=1, NotChecked=0, Total=7482 [2024-11-09 06:25:05,444 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 22 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:25:05,444 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 308 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1383 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 06:25:05,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-09 06:25:05,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 151. [2024-11-09 06:25:05,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 148 states have (on average 1.0337837837837838) internal successors, (153), 150 states have internal predecessors, (153), 0 states have call successors, (0), 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 06:25:05,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2024-11-09 06:25:05,449 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 140 [2024-11-09 06:25:05,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:25:05,449 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2024-11-09 06:25:05,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 3.9014084507042255) internal successors, (277), 71 states have internal predecessors, (277), 0 states have call successors, (0), 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 06:25:05,450 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2024-11-09 06:25:05,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-11-09 06:25:05,451 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:25:05,451 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:25:05,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-09 06:25:05,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-09 06:25:05,652 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:25:05,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:25:05,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1902284579, now seen corresponding path program 12 times [2024-11-09 06:25:05,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:25:05,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528099257] [2024-11-09 06:25:05,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:25:05,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:25:05,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:25:07,610 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 145 proven. 443 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 06:25:07,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:25:07,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528099257] [2024-11-09 06:25:07,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528099257] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:25:07,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429724300] [2024-11-09 06:25:07,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:25:07,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:25:07,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:25:07,612 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:25:07,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-09 06:25:08,458 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:25:08,458 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:25:08,464 INFO L255 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-09 06:25:08,467 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:25:09,270 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 176 proven. 412 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 06:25:09,270 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:25:10,205 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 5 treesize of output 3 [2024-11-09 06:25:10,652 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 176 proven. 412 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 06:25:10,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429724300] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:25:10,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [414282916] [2024-11-09 06:25:10,653 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:25:10,653 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:25:10,654 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:25:10,654 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:25:10,654 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:25:11,390 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:25:13,643 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28707#(and (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)))' at error location [2024-11-09 06:25:13,644 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:25:13,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:25:13,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 57 [2024-11-09 06:25:13,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092172411] [2024-11-09 06:25:13,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:25:13,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-09 06:25:13,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:25:13,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-09 06:25:13,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=4626, Unknown=0, NotChecked=0, Total=5112 [2024-11-09 06:25:13,646 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand has 58 states, 57 states have (on average 3.9649122807017543) internal successors, (226), 58 states have internal predecessors, (226), 0 states have call successors, (0), 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 06:25:15,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:25:15,172 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2024-11-09 06:25:15,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-09 06:25:15,173 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 3.9649122807017543) internal successors, (226), 58 states have internal predecessors, (226), 0 states have call successors, (0), 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 143 [2024-11-09 06:25:15,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:25:15,175 INFO L225 Difference]: With dead ends: 158 [2024-11-09 06:25:15,175 INFO L226 Difference]: Without dead ends: 155 [2024-11-09 06:25:15,175 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 369 SyntacticMatches, 15 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2756 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=514, Invalid=4742, Unknown=0, NotChecked=0, Total=5256 [2024-11-09 06:25:15,176 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 2238 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 2240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:25:15,176 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 487 Invalid, 2240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2238 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-09 06:25:15,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-11-09 06:25:15,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2024-11-09 06:25:15,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 151 states have (on average 1.033112582781457) internal successors, (156), 153 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 06:25:15,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2024-11-09 06:25:15,182 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 143 [2024-11-09 06:25:15,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:25:15,182 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2024-11-09 06:25:15,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 3.9649122807017543) internal successors, (226), 58 states have internal predecessors, (226), 0 states have call successors, (0), 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 06:25:15,183 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2024-11-09 06:25:15,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-09 06:25:15,184 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:25:15,184 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:25:15,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-11-09 06:25:15,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2024-11-09 06:25:15,385 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:25:15,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:25:15,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1560551469, now seen corresponding path program 24 times [2024-11-09 06:25:15,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:25:15,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852268448] [2024-11-09 06:25:15,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:25:15,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:25:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:25:17,713 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 49 proven. 564 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 06:25:17,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:25:17,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852268448] [2024-11-09 06:25:17,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852268448] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:25:17,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636870177] [2024-11-09 06:25:17,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:25:17,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:25:17,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:25:17,715 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:25:17,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-09 06:25:18,059 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:25:18,059 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:25:18,063 INFO L255 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-11-09 06:25:18,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:25:18,845 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 06:25:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 13 proven. 600 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 06:25:20,028 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:25:20,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-09 06:25:20,532 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 16 treesize of output 12 [2024-11-09 06:25:20,775 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 13 proven. 600 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-09 06:25:20,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636870177] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:25:20,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1375923063] [2024-11-09 06:25:20,777 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:25:20,777 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:25:20,778 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:25:20,778 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:25:20,778 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:25:21,746 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:25:25,764 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29967#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_541| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_544| Int)) (and (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_544|) 1) (= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_544|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_541|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_544|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_541|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_541|) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:25:25,764 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:25:25,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:25:25,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 34, 34] total 68 [2024-11-09 06:25:25,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217014709] [2024-11-09 06:25:25,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:25:25,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-09 06:25:25,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:25:25,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-09 06:25:25,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=6445, Unknown=1, NotChecked=0, Total=6642 [2024-11-09 06:25:25,767 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand has 68 states, 68 states have (on average 3.3970588235294117) internal successors, (231), 68 states have internal predecessors, (231), 0 states have call successors, (0), 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 06:25:34,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:25:34,681 INFO L93 Difference]: Finished difference Result 405 states and 408 transitions. [2024-11-09 06:25:34,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2024-11-09 06:25:34,682 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.3970588235294117) internal successors, (231), 68 states have internal predecessors, (231), 0 states have call successors, (0), 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 145 [2024-11-09 06:25:34,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:25:34,683 INFO L225 Difference]: With dead ends: 405 [2024-11-09 06:25:34,683 INFO L226 Difference]: Without dead ends: 164 [2024-11-09 06:25:34,685 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 381 SyntacticMatches, 3 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2537 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=497, Invalid=18684, Unknown=1, NotChecked=0, Total=19182 [2024-11-09 06:25:34,686 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 39 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 8267 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 8292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 8267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-11-09 06:25:34,686 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 984 Invalid, 8292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 8267 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2024-11-09 06:25:34,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-11-09 06:25:34,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2024-11-09 06:25:34,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 157 states have (on average 1.0318471337579618) internal successors, (162), 159 states have internal predecessors, (162), 0 states have call successors, (0), 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 06:25:34,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2024-11-09 06:25:34,690 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 145 [2024-11-09 06:25:34,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:25:34,691 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2024-11-09 06:25:34,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.3970588235294117) internal successors, (231), 68 states have internal predecessors, (231), 0 states have call successors, (0), 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 06:25:34,691 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2024-11-09 06:25:34,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2024-11-09 06:25:34,692 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:25:34,693 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:25:34,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-11-09 06:25:34,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:25:34,893 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:25:34,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:25:34,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1926704398, now seen corresponding path program 25 times [2024-11-09 06:25:34,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:25:34,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762185890] [2024-11-09 06:25:34,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:25:34,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:25:34,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:25:36,469 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 176 proven. 474 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-11-09 06:25:36,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:25:36,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762185890] [2024-11-09 06:25:36,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762185890] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:25:36,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973772131] [2024-11-09 06:25:36,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:25:36,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:25:36,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:25:36,470 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:25:36,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-09 06:25:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:25:36,840 INFO L255 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-09 06:25:36,843 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:25:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 210 proven. 440 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-11-09 06:25:37,755 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:25:38,757 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 5 treesize of output 3 [2024-11-09 06:25:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 210 proven. 440 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-11-09 06:25:39,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973772131] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:25:39,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1758695927] [2024-11-09 06:25:39,286 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:25:39,287 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:25:39,287 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:25:39,287 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:25:39,287 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:25:40,190 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:25:42,780 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31624#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_572| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_575| Int)) (and (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_572|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_575|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_572|) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_575|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_572|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_575|) 1) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:25:42,780 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:25:42,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:25:42,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 62 [2024-11-09 06:25:42,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084214129] [2024-11-09 06:25:42,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:25:42,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-09 06:25:42,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:25:42,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-09 06:25:42,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=555, Invalid=5450, Unknown=1, NotChecked=0, Total=6006 [2024-11-09 06:25:42,783 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand has 64 states, 63 states have (on average 3.761904761904762) internal successors, (237), 63 states have internal predecessors, (237), 0 states have call successors, (0), 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 06:25:44,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:25:44,374 INFO L93 Difference]: Finished difference Result 169 states and 172 transitions. [2024-11-09 06:25:44,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-09 06:25:44,375 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 3.761904761904762) internal successors, (237), 63 states have internal predecessors, (237), 0 states have call successors, (0), 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 151 [2024-11-09 06:25:44,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:25:44,376 INFO L225 Difference]: With dead ends: 169 [2024-11-09 06:25:44,376 INFO L226 Difference]: Without dead ends: 169 [2024-11-09 06:25:44,377 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 388 SyntacticMatches, 16 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3057 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=584, Invalid=5577, Unknown=1, NotChecked=0, Total=6162 [2024-11-09 06:25:44,377 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 22 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 2593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:25:44,377 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 539 Invalid, 2593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2592 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-09 06:25:44,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-09 06:25:44,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 162. [2024-11-09 06:25:44,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 159 states have (on average 1.0314465408805031) internal successors, (164), 161 states have internal predecessors, (164), 0 states have call successors, (0), 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 06:25:44,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 164 transitions. [2024-11-09 06:25:44,381 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 164 transitions. Word has length 151 [2024-11-09 06:25:44,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:25:44,381 INFO L471 AbstractCegarLoop]: Abstraction has 162 states and 164 transitions. [2024-11-09 06:25:44,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 3.761904761904762) internal successors, (237), 63 states have internal predecessors, (237), 0 states have call successors, (0), 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 06:25:44,382 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 164 transitions. [2024-11-09 06:25:44,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2024-11-09 06:25:44,383 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:25:44,383 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:25:44,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-09 06:25:44,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-11-09 06:25:44,584 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:25:44,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:25:44,584 INFO L85 PathProgramCache]: Analyzing trace with hash -506400695, now seen corresponding path program 13 times [2024-11-09 06:25:44,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:25:44,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080833176] [2024-11-09 06:25:44,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:25:44,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:25:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:25:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 176 proven. 513 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-11-09 06:25:46,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:25:46,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080833176] [2024-11-09 06:25:46,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080833176] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:25:46,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433358365] [2024-11-09 06:25:46,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:25:46,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:25:46,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:25:46,471 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:25:46,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-09 06:25:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:25:46,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-09 06:25:46,899 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:25:47,794 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 210 proven. 479 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-11-09 06:25:47,794 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:25:48,774 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 5 treesize of output 3 [2024-11-09 06:25:49,250 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 210 proven. 479 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-11-09 06:25:49,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433358365] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:25:49,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2101462705] [2024-11-09 06:25:49,251 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:25:49,251 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:25:49,251 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:25:49,251 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:25:49,251 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:25:50,135 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:25:52,386 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32951#(and (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)))' at error location [2024-11-09 06:25:52,386 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:25:52,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:25:52,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 61 [2024-11-09 06:25:52,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035944145] [2024-11-09 06:25:52,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:25:52,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-09 06:25:52,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:25:52,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-09 06:25:52,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=542, Invalid=5007, Unknown=1, NotChecked=0, Total=5550 [2024-11-09 06:25:52,388 INFO L87 Difference]: Start difference. First operand 162 states and 164 transitions. Second operand has 62 states, 61 states have (on average 3.9672131147540983) internal successors, (242), 62 states have internal predecessors, (242), 0 states have call successors, (0), 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 06:25:54,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:25:54,142 INFO L93 Difference]: Finished difference Result 169 states and 171 transitions. [2024-11-09 06:25:54,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-09 06:25:54,142 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 3.9672131147540983) internal successors, (242), 62 states have internal predecessors, (242), 0 states have call successors, (0), 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 154 [2024-11-09 06:25:54,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:25:54,143 INFO L225 Difference]: With dead ends: 169 [2024-11-09 06:25:54,143 INFO L226 Difference]: Without dead ends: 166 [2024-11-09 06:25:54,144 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 400 SyntacticMatches, 16 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3028 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=572, Invalid=5127, Unknown=1, NotChecked=0, Total=5700 [2024-11-09 06:25:54,144 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 2513 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 2515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:25:54,144 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 516 Invalid, 2515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2513 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-11-09 06:25:54,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-11-09 06:25:54,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2024-11-09 06:25:54,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 162 states have (on average 1.0308641975308641) internal successors, (167), 164 states have internal predecessors, (167), 0 states have call successors, (0), 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 06:25:54,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2024-11-09 06:25:54,147 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 154 [2024-11-09 06:25:54,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:25:54,148 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2024-11-09 06:25:54,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 3.9672131147540983) internal successors, (242), 62 states have internal predecessors, (242), 0 states have call successors, (0), 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 06:25:54,148 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2024-11-09 06:25:54,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-11-09 06:25:54,149 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:25:54,149 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:25:54,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-09 06:25:54,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:25:54,354 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:25:54,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:25:54,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1319727239, now seen corresponding path program 26 times [2024-11-09 06:25:54,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:25:54,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422052971] [2024-11-09 06:25:54,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:25:54,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:25:54,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:25:56,587 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 53 proven. 663 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-11-09 06:25:56,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:25:56,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422052971] [2024-11-09 06:25:56,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422052971] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:25:56,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180573256] [2024-11-09 06:25:56,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:25:56,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:25:56,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:25:56,589 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:25:56,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-09 06:26:02,935 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-09 06:26:02,935 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:26:02,948 INFO L255 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 157 conjuncts are in the unsatisfiable core [2024-11-09 06:26:02,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:26:05,343 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 11 treesize of output 7 [2024-11-09 06:26:07,341 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 14 proven. 949 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:26:07,342 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:26:10,395 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:26:10,395 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 99 treesize of output 99 [2024-11-09 06:26:10,421 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 30 treesize of output 26 [2024-11-09 06:26:10,445 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:26:10,445 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 45 treesize of output 37 [2024-11-09 06:26:12,299 INFO L134 CoverageAnalysis]: Checked inductivity of 963 backedges. 14 proven. 702 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-11-09 06:26:12,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180573256] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:26:12,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1730080476] [2024-11-09 06:26:12,300 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:26:12,300 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:26:12,301 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:26:12,301 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:26:12,301 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:26:13,323 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:26:18,211 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34344#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_622| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_612| Int)) (and (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_612|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_622|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_612|) 1) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_622|) (= |v_ULTIMATE.start_cstrcmp_~s1#1.offset_622| (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_612|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:26:18,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:26:18,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:26:18,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 49, 36] total 114 [2024-11-09 06:26:18,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381453011] [2024-11-09 06:26:18,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:26:18,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2024-11-09 06:26:18,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:18,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2024-11-09 06:26:18,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=15881, Unknown=1, NotChecked=0, Total=16256 [2024-11-09 06:26:18,215 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand has 114 states, 114 states have (on average 3.4473684210526314) internal successors, (393), 114 states have internal predecessors, (393), 0 states have call successors, (0), 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 06:26:30,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:30,982 INFO L93 Difference]: Finished difference Result 434 states and 437 transitions. [2024-11-09 06:26:30,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2024-11-09 06:26:30,983 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 3.4473684210526314) internal successors, (393), 114 states have internal predecessors, (393), 0 states have call successors, (0), 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 156 [2024-11-09 06:26:30,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:30,984 INFO L225 Difference]: With dead ends: 434 [2024-11-09 06:26:30,984 INFO L226 Difference]: Without dead ends: 175 [2024-11-09 06:26:30,986 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 372 SyntacticMatches, 2 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6422 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=959, Invalid=41270, Unknown=1, NotChecked=0, Total=42230 [2024-11-09 06:26:30,986 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 64 mSDsluCounter, 1286 mSDsCounter, 0 mSdLazyCounter, 11795 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 11827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 11795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:30,987 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 1305 Invalid, 11827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 11795 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2024-11-09 06:26:30,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-09 06:26:30,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2024-11-09 06:26:30,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 168 states have (on average 1.0297619047619047) internal successors, (173), 170 states have internal predecessors, (173), 0 states have call successors, (0), 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 06:26:30,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2024-11-09 06:26:30,990 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 156 [2024-11-09 06:26:30,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:30,990 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2024-11-09 06:26:30,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 3.4473684210526314) internal successors, (393), 114 states have internal predecessors, (393), 0 states have call successors, (0), 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 06:26:30,990 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2024-11-09 06:26:30,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2024-11-09 06:26:30,991 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:30,991 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:26:31,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-11-09 06:26:31,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:31,192 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:26:31,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:31,192 INFO L85 PathProgramCache]: Analyzing trace with hash -485270248, now seen corresponding path program 27 times [2024-11-09 06:26:31,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:31,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509170523] [2024-11-09 06:26:31,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:31,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:31,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:32,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1043 backedges. 210 proven. 546 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-11-09 06:26:32,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:32,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509170523] [2024-11-09 06:26:32,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509170523] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:26:32,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16897513] [2024-11-09 06:26:32,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:26:32,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:32,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:26:32,593 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:26:32,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-09 06:26:33,566 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:26:33,566 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:26:33,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-09 06:26:33,576 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:26:34,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1043 backedges. 247 proven. 509 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-11-09 06:26:34,621 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:26:35,511 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 06:26:36,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1043 backedges. 247 proven. 509 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-11-09 06:26:36,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16897513] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:26:36,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [836639639] [2024-11-09 06:26:36,548 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:26:36,548 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:26:36,548 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:26:36,548 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:26:36,548 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:26:37,575 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:26:40,171 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '36167#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_656| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_646| Int)) (and (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_646|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_656|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_656|) (= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_646|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_656|) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_646|) 1)))' at error location [2024-11-09 06:26:40,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:26:40,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:26:40,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 79 [2024-11-09 06:26:40,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454409722] [2024-11-09 06:26:40,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:26:40,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2024-11-09 06:26:40,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:40,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2024-11-09 06:26:40,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=944, Invalid=7985, Unknown=1, NotChecked=0, Total=8930 [2024-11-09 06:26:40,174 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand has 81 states, 80 states have (on average 3.7875) internal successors, (303), 80 states have internal predecessors, (303), 0 states have call successors, (0), 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 06:26:41,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:41,776 INFO L93 Difference]: Finished difference Result 180 states and 183 transitions. [2024-11-09 06:26:41,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-09 06:26:41,776 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 80 states have (on average 3.7875) internal successors, (303), 80 states have internal predecessors, (303), 0 states have call successors, (0), 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 162 [2024-11-09 06:26:41,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:41,778 INFO L225 Difference]: With dead ends: 180 [2024-11-09 06:26:41,778 INFO L226 Difference]: Without dead ends: 180 [2024-11-09 06:26:41,778 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 420 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3645 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=990, Invalid=8129, Unknown=1, NotChecked=0, Total=9120 [2024-11-09 06:26:41,778 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 19 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 3141 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 3142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:41,779 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 609 Invalid, 3142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3141 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-09 06:26:41,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-11-09 06:26:41,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 173. [2024-11-09 06:26:41,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 170 states have (on average 1.0294117647058822) internal successors, (175), 172 states have internal predecessors, (175), 0 states have call successors, (0), 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 06:26:41,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2024-11-09 06:26:41,782 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 162 [2024-11-09 06:26:41,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:41,782 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2024-11-09 06:26:41,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 80 states have (on average 3.7875) internal successors, (303), 80 states have internal predecessors, (303), 0 states have call successors, (0), 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 06:26:41,782 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2024-11-09 06:26:41,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2024-11-09 06:26:41,783 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:41,783 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:26:41,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-09 06:26:41,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:41,984 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:26:41,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:41,985 INFO L85 PathProgramCache]: Analyzing trace with hash 175336547, now seen corresponding path program 14 times [2024-11-09 06:26:41,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:41,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405366600] [2024-11-09 06:26:41,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:41,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:42,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:43,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 210 proven. 588 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-11-09 06:26:43,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:43,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405366600] [2024-11-09 06:26:43,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405366600] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:26:43,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516159865] [2024-11-09 06:26:43,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:26:43,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:43,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:26:43,929 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:26:43,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-09 06:26:54,221 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-09 06:26:54,221 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:26:54,238 INFO L255 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-09 06:26:54,241 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:26:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 260 proven. 538 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-11-09 06:26:55,930 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:26:57,378 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 06:26:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 260 proven. 538 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-11-09 06:26:57,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516159865] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:26:57,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1453738492] [2024-11-09 06:26:57,867 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:26:57,867 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:26:57,867 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:26:57,867 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:26:57,867 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:26:58,515 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:27:00,514 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37600#(and (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)))' at error location [2024-11-09 06:27:00,514 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:27:00,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:27:00,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32, 32] total 79 [2024-11-09 06:27:00,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894077094] [2024-11-09 06:27:00,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:27:00,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-11-09 06:27:00,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:27:00,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-11-09 06:27:00,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1056, Invalid=7686, Unknown=0, NotChecked=0, Total=8742 [2024-11-09 06:27:00,517 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand has 80 states, 79 states have (on average 4.139240506329114) internal successors, (327), 80 states have internal predecessors, (327), 0 states have call successors, (0), 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 06:27:01,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:27:01,884 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2024-11-09 06:27:01,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-09 06:27:01,885 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 4.139240506329114) internal successors, (327), 80 states have internal predecessors, (327), 0 states have call successors, (0), 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 165 [2024-11-09 06:27:01,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:27:01,886 INFO L225 Difference]: With dead ends: 180 [2024-11-09 06:27:01,886 INFO L226 Difference]: Without dead ends: 177 [2024-11-09 06:27:01,886 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 415 SyntacticMatches, 17 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4908 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1088, Invalid=7842, Unknown=0, NotChecked=0, Total=8930 [2024-11-09 06:27:01,887 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 2037 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 2039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:27:01,887 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 424 Invalid, 2039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2037 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 06:27:01,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-11-09 06:27:01,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2024-11-09 06:27:01,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 173 states have (on average 1.0289017341040463) internal successors, (178), 175 states have internal predecessors, (178), 0 states have call successors, (0), 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 06:27:01,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2024-11-09 06:27:01,890 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 165 [2024-11-09 06:27:01,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:27:01,891 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2024-11-09 06:27:01,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 4.139240506329114) internal successors, (327), 80 states have internal predecessors, (327), 0 states have call successors, (0), 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 06:27:01,891 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2024-11-09 06:27:01,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-11-09 06:27:01,892 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:27:01,892 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:27:01,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-11-09 06:27:02,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-11-09 06:27:02,093 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:27:02,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:27:02,094 INFO L85 PathProgramCache]: Analyzing trace with hash 994733331, now seen corresponding path program 28 times [2024-11-09 06:27:02,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:27:02,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27677938] [2024-11-09 06:27:02,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:27:02,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:27:02,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:27:04,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 57 proven. 770 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-11-09 06:27:04,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:27:04,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27677938] [2024-11-09 06:27:04,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27677938] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:27:04,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760976252] [2024-11-09 06:27:04,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:27:04,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:27:04,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:27:04,714 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:27:04,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-09 06:27:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:27:05,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-11-09 06:27:05,150 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:27:06,120 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 06:27:07,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 15 proven. 812 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-11-09 06:27:07,461 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:27:08,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-09 06:27:08,032 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 16 treesize of output 12 [2024-11-09 06:27:08,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 15 proven. 812 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-11-09 06:27:08,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760976252] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:27:08,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [109422710] [2024-11-09 06:27:08,278 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:27:08,278 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:27:08,278 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:27:08,278 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:27:08,278 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:27:09,192 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:27:13,104 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39044#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_696| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_686| Int)) (and (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_696|) (= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_686|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_696|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_686|) 1) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_686|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_696|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:27:13,104 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:27:13,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:27:13,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 38, 38] total 76 [2024-11-09 06:27:13,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936108246] [2024-11-09 06:27:13,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:27:13,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-09 06:27:13,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:27:13,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-09 06:27:13,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=7797, Unknown=1, NotChecked=0, Total=8010 [2024-11-09 06:27:13,107 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand has 76 states, 76 states have (on average 3.460526315789474) internal successors, (263), 76 states have internal predecessors, (263), 0 states have call successors, (0), 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 06:27:22,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:27:22,058 INFO L93 Difference]: Finished difference Result 463 states and 466 transitions. [2024-11-09 06:27:22,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2024-11-09 06:27:22,058 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.460526315789474) internal successors, (263), 76 states have internal predecessors, (263), 0 states have call successors, (0), 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 167 [2024-11-09 06:27:22,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:27:22,059 INFO L225 Difference]: With dead ends: 463 [2024-11-09 06:27:22,059 INFO L226 Difference]: Without dead ends: 186 [2024-11-09 06:27:22,060 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 443 SyntacticMatches, 3 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3113 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=553, Invalid=23316, Unknown=1, NotChecked=0, Total=23870 [2024-11-09 06:27:22,061 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 43 mSDsluCounter, 1250 mSDsCounter, 0 mSdLazyCounter, 10914 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 10943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 10914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:27:22,061 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 1270 Invalid, 10943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 10914 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2024-11-09 06:27:22,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-11-09 06:27:22,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 182. [2024-11-09 06:27:22,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 179 states have (on average 1.0279329608938548) internal successors, (184), 181 states have internal predecessors, (184), 0 states have call successors, (0), 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 06:27:22,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2024-11-09 06:27:22,063 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 167 [2024-11-09 06:27:22,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:27:22,064 INFO L471 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2024-11-09 06:27:22,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.460526315789474) internal successors, (263), 76 states have internal predecessors, (263), 0 states have call successors, (0), 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 06:27:22,064 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2024-11-09 06:27:22,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2024-11-09 06:27:22,064 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:27:22,065 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:27:22,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-09 06:27:22,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-11-09 06:27:22,265 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:27:22,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:27:22,265 INFO L85 PathProgramCache]: Analyzing trace with hash 612946482, now seen corresponding path program 29 times [2024-11-09 06:27:22,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:27:22,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73842759] [2024-11-09 06:27:22,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:27:22,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:27:22,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:27:24,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 247 proven. 623 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-11-09 06:27:24,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:27:24,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73842759] [2024-11-09 06:27:24,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73842759] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:27:24,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492482923] [2024-11-09 06:27:24,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:27:24,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:27:24,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:27:24,162 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:27:24,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-09 06:27:37,877 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-09 06:27:37,877 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:27:37,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-09 06:27:37,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:27:39,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 301 proven. 569 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-11-09 06:27:39,234 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:27:40,441 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 06:27:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 301 proven. 569 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-11-09 06:27:41,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492482923] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:27:41,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [423197206] [2024-11-09 06:27:41,008 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:27:41,008 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:27:41,008 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:27:41,009 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:27:41,009 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:27:42,153 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:27:44,790 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '40952#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_732| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_722| Int)) (and (= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_722|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_732|) (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_722|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_732|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_732|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_722|) 1) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:27:44,790 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:27:44,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:27:44,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 34] total 85 [2024-11-09 06:27:44,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497614609] [2024-11-09 06:27:44,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:27:44,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-11-09 06:27:44,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:27:44,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-11-09 06:27:44,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1196, Invalid=8903, Unknown=1, NotChecked=0, Total=10100 [2024-11-09 06:27:44,794 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand has 87 states, 86 states have (on average 3.953488372093023) internal successors, (340), 86 states have internal predecessors, (340), 0 states have call successors, (0), 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 06:27:46,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:27:46,113 INFO L93 Difference]: Finished difference Result 191 states and 194 transitions. [2024-11-09 06:27:46,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-09 06:27:46,113 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 3.953488372093023) internal successors, (340), 86 states have internal predecessors, (340), 0 states have call successors, (0), 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 173 [2024-11-09 06:27:46,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:27:46,114 INFO L225 Difference]: With dead ends: 191 [2024-11-09 06:27:46,114 INFO L226 Difference]: Without dead ends: 191 [2024-11-09 06:27:46,115 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 433 SyntacticMatches, 18 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5429 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1229, Invalid=9072, Unknown=1, NotChecked=0, Total=10302 [2024-11-09 06:27:46,115 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 2189 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 2190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:27:46,115 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 454 Invalid, 2190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2189 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 06:27:46,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-11-09 06:27:46,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 184. [2024-11-09 06:27:46,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 181 states have (on average 1.0276243093922652) internal successors, (186), 183 states have internal predecessors, (186), 0 states have call successors, (0), 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 06:27:46,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2024-11-09 06:27:46,119 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 173 [2024-11-09 06:27:46,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:27:46,119 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2024-11-09 06:27:46,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 3.953488372093023) internal successors, (340), 86 states have internal predecessors, (340), 0 states have call successors, (0), 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 06:27:46,120 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2024-11-09 06:27:46,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2024-11-09 06:27:46,121 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:27:46,121 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:27:46,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-11-09 06:27:46,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-11-09 06:27:46,322 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:27:46,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:27:46,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1910920951, now seen corresponding path program 15 times [2024-11-09 06:27:46,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:27:46,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270839648] [2024-11-09 06:27:46,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:27:46,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:27:46,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:27:48,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1245 backedges. 247 proven. 668 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-11-09 06:27:48,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:27:48,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270839648] [2024-11-09 06:27:48,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270839648] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:27:48,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461526246] [2024-11-09 06:27:48,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:27:48,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:27:48,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:27:48,613 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:27:48,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-09 06:27:49,963 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:27:49,963 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:27:49,971 INFO L255 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-11-09 06:27:49,973 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:27:50,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1245 backedges. 287 proven. 628 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-11-09 06:27:50,875 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:27:51,957 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 5 treesize of output 3 [2024-11-09 06:27:52,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1245 backedges. 287 proven. 628 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-11-09 06:27:52,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461526246] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:27:52,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1505601639] [2024-11-09 06:27:52,449 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:27:52,449 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:27:52,449 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:27:52,449 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:27:52,449 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:27:53,460 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:27:55,523 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '42463#(and (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)))' at error location [2024-11-09 06:27:55,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:27:55,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:27:55,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 34] total 69 [2024-11-09 06:27:55,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430482527] [2024-11-09 06:27:55,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:27:55,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-09 06:27:55,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:27:55,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-09 06:27:55,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=6131, Unknown=1, NotChecked=0, Total=6806 [2024-11-09 06:27:55,526 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand has 70 states, 69 states have (on average 3.971014492753623) internal successors, (274), 70 states have internal predecessors, (274), 0 states have call successors, (0), 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 06:27:57,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:27:57,059 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2024-11-09 06:27:57,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-09 06:27:57,060 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 3.971014492753623) internal successors, (274), 70 states have internal predecessors, (274), 0 states have call successors, (0), 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 176 [2024-11-09 06:27:57,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:27:57,061 INFO L225 Difference]: With dead ends: 191 [2024-11-09 06:27:57,061 INFO L226 Difference]: Without dead ends: 188 [2024-11-09 06:27:57,061 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 460 SyntacticMatches, 18 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3768 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=708, Invalid=6263, Unknown=1, NotChecked=0, Total=6972 [2024-11-09 06:27:57,061 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 2981 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 2983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:27:57,062 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 577 Invalid, 2983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2981 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-09 06:27:57,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2024-11-09 06:27:57,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2024-11-09 06:27:57,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 184 states have (on average 1.0271739130434783) internal successors, (189), 186 states have internal predecessors, (189), 0 states have call successors, (0), 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 06:27:57,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2024-11-09 06:27:57,064 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 176 [2024-11-09 06:27:57,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:27:57,064 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2024-11-09 06:27:57,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 3.971014492753623) internal successors, (274), 70 states have internal predecessors, (274), 0 states have call successors, (0), 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 06:27:57,064 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2024-11-09 06:27:57,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2024-11-09 06:27:57,065 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:27:57,065 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:27:57,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-11-09 06:27:57,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-11-09 06:27:57,266 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:27:57,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:27:57,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1851004985, now seen corresponding path program 30 times [2024-11-09 06:27:57,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:27:57,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661975506] [2024-11-09 06:27:57,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:27:57,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:27:57,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:28:00,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 61 proven. 885 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-11-09 06:28:00,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:28:00,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661975506] [2024-11-09 06:28:00,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661975506] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:28:00,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141276616] [2024-11-09 06:28:00,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:28:00,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:28:00,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:28:00,245 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:28:00,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-09 06:28:00,719 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:28:00,719 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:28:00,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-11-09 06:28:00,727 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:28:01,622 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 06:28:03,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 16 proven. 930 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-11-09 06:28:03,191 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:28:03,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-09 06:28:03,686 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 16 treesize of output 12 [2024-11-09 06:28:03,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 16 proven. 930 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-11-09 06:28:03,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141276616] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:28:03,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [860892263] [2024-11-09 06:28:03,937 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:28:03,937 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:28:03,938 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:28:03,938 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:28:03,938 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:28:04,811 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:28:08,859 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '43998#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_773| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_763| Int)) (and (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_763|) 1) (= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_763|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_773|) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_773|) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_763|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_773|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:28:08,860 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:28:08,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:28:08,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 40, 40] total 80 [2024-11-09 06:28:08,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089497544] [2024-11-09 06:28:08,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:28:08,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-11-09 06:28:08,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:28:08,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-11-09 06:28:08,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=8521, Unknown=1, NotChecked=0, Total=8742 [2024-11-09 06:28:08,862 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand has 80 states, 80 states have (on average 3.4875) internal successors, (279), 80 states have internal predecessors, (279), 0 states have call successors, (0), 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 06:28:19,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:28:19,480 INFO L93 Difference]: Finished difference Result 492 states and 495 transitions. [2024-11-09 06:28:19,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2024-11-09 06:28:19,481 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.4875) internal successors, (279), 80 states have internal predecessors, (279), 0 states have call successors, (0), 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 178 [2024-11-09 06:28:19,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:28:19,482 INFO L225 Difference]: With dead ends: 492 [2024-11-09 06:28:19,482 INFO L226 Difference]: Without dead ends: 197 [2024-11-09 06:28:19,483 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 474 SyntacticMatches, 3 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3425 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=581, Invalid=25824, Unknown=1, NotChecked=0, Total=26406 [2024-11-09 06:28:19,484 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 48 mSDsluCounter, 1352 mSDsCounter, 0 mSdLazyCounter, 11637 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 11669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 11637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:28:19,484 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1373 Invalid, 11669 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [32 Valid, 11637 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2024-11-09 06:28:19,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-09 06:28:19,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 193. [2024-11-09 06:28:19,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 190 states have (on average 1.0263157894736843) internal successors, (195), 192 states have internal predecessors, (195), 0 states have call successors, (0), 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 06:28:19,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2024-11-09 06:28:19,488 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 178 [2024-11-09 06:28:19,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:28:19,488 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2024-11-09 06:28:19,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.4875) internal successors, (279), 80 states have internal predecessors, (279), 0 states have call successors, (0), 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 06:28:19,488 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2024-11-09 06:28:19,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2024-11-09 06:28:19,489 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:28:19,490 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:28:19,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2024-11-09 06:28:19,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:28:19,690 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:28:19,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:28:19,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1552402472, now seen corresponding path program 31 times [2024-11-09 06:28:19,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:28:19,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797851375] [2024-11-09 06:28:19,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:28:19,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:28:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:28:21,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 287 proven. 705 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2024-11-09 06:28:21,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:28:21,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797851375] [2024-11-09 06:28:21,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797851375] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:28:21,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326578611] [2024-11-09 06:28:21,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:28:21,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:28:21,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:28:21,385 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:28:21,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-09 06:28:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:28:21,796 INFO L255 TraceCheckSpWp]: Trace formula consists of 934 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-11-09 06:28:21,799 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:28:22,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 330 proven. 662 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2024-11-09 06:28:22,933 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:28:24,148 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 5 treesize of output 3 [2024-11-09 06:28:24,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 330 proven. 662 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2024-11-09 06:28:24,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326578611] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:28:24,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [432931188] [2024-11-09 06:28:24,811 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:28:24,811 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:28:24,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:28:24,812 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:28:24,812 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:28:25,606 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:28:28,233 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '46009#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_810| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_800| Int)) (and (= |v_ULTIMATE.start_cstrcmp_~s1#1.offset_810| (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_800|)) (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= 1 (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_800|)) (= (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|)) (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_800|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_810|))) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_810|) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:28:28,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:28:28,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:28:28,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36, 36] total 74 [2024-11-09 06:28:28,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163667722] [2024-11-09 06:28:28,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:28:28,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-09 06:28:28,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:28:28,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-09 06:28:28,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=759, Invalid=7250, Unknown=1, NotChecked=0, Total=8010 [2024-11-09 06:28:28,237 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand has 76 states, 75 states have (on average 3.8) internal successors, (285), 75 states have internal predecessors, (285), 0 states have call successors, (0), 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 06:28:30,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:28:30,118 INFO L93 Difference]: Finished difference Result 202 states and 205 transitions. [2024-11-09 06:28:30,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-09 06:28:30,119 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 3.8) internal successors, (285), 75 states have internal predecessors, (285), 0 states have call successors, (0), 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 184 [2024-11-09 06:28:30,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:28:30,120 INFO L225 Difference]: With dead ends: 202 [2024-11-09 06:28:30,120 INFO L226 Difference]: Without dead ends: 202 [2024-11-09 06:28:30,121 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 478 SyntacticMatches, 19 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4203 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=794, Invalid=7395, Unknown=1, NotChecked=0, Total=8190 [2024-11-09 06:28:30,121 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 22 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 3527 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 3528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:28:30,121 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 694 Invalid, 3528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3527 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-09 06:28:30,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-11-09 06:28:30,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 195. [2024-11-09 06:28:30,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 192 states have (on average 1.0260416666666667) internal successors, (197), 194 states have internal predecessors, (197), 0 states have call successors, (0), 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 06:28:30,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2024-11-09 06:28:30,126 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 184 [2024-11-09 06:28:30,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:28:30,126 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2024-11-09 06:28:30,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 3.8) internal successors, (285), 75 states have internal predecessors, (285), 0 states have call successors, (0), 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 06:28:30,127 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2024-11-09 06:28:30,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2024-11-09 06:28:30,127 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:28:30,128 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:28:30,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-11-09 06:28:30,328 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:28:30,328 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:28:30,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:28:30,329 INFO L85 PathProgramCache]: Analyzing trace with hash 587176355, now seen corresponding path program 16 times [2024-11-09 06:28:30,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:28:30,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209885890] [2024-11-09 06:28:30,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:28:30,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:28:30,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:28:32,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1416 backedges. 287 proven. 753 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2024-11-09 06:28:32,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:28:32,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209885890] [2024-11-09 06:28:32,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209885890] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:28:32,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49197327] [2024-11-09 06:28:32,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:28:32,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:28:32,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:28:32,564 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:28:32,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-09 06:28:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:28:33,083 INFO L255 TraceCheckSpWp]: Trace formula consists of 946 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-11-09 06:28:33,086 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:28:34,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1416 backedges. 330 proven. 710 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2024-11-09 06:28:34,088 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:28:35,342 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 5 treesize of output 3 [2024-11-09 06:28:35,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1416 backedges. 330 proven. 710 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2024-11-09 06:28:35,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49197327] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:28:35,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1662937657] [2024-11-09 06:28:35,974 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:28:35,974 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:28:35,974 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:28:35,974 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:28:35,974 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:28:36,785 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:28:39,199 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '47612#(and (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)))' at error location [2024-11-09 06:28:39,199 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:28:39,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:28:39,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36, 36] total 73 [2024-11-09 06:28:39,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012465352] [2024-11-09 06:28:39,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:28:39,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-11-09 06:28:39,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:28:39,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-11-09 06:28:39,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=6735, Unknown=1, NotChecked=0, Total=7482 [2024-11-09 06:28:39,202 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand has 74 states, 73 states have (on average 3.9726027397260273) internal successors, (290), 74 states have internal predecessors, (290), 0 states have call successors, (0), 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 06:28:41,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:28:41,308 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2024-11-09 06:28:41,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-09 06:28:41,309 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 3.9726027397260273) internal successors, (290), 74 states have internal predecessors, (290), 0 states have call successors, (0), 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 187 [2024-11-09 06:28:41,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:28:41,310 INFO L225 Difference]: With dead ends: 202 [2024-11-09 06:28:41,310 INFO L226 Difference]: Without dead ends: 199 [2024-11-09 06:28:41,310 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 490 SyntacticMatches, 19 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4168 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=782, Invalid=6873, Unknown=1, NotChecked=0, Total=7656 [2024-11-09 06:28:41,311 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 3210 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 3212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-09 06:28:41,311 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 595 Invalid, 3212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3210 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-09 06:28:41,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2024-11-09 06:28:41,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2024-11-09 06:28:41,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 195 states have (on average 1.0256410256410255) internal successors, (200), 197 states have internal predecessors, (200), 0 states have call successors, (0), 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 06:28:41,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 200 transitions. [2024-11-09 06:28:41,314 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 200 transitions. Word has length 187 [2024-11-09 06:28:41,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:28:41,314 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 200 transitions. [2024-11-09 06:28:41,315 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 3.9726027397260273) internal successors, (290), 74 states have internal predecessors, (290), 0 states have call successors, (0), 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 06:28:41,315 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 200 transitions. [2024-11-09 06:28:41,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2024-11-09 06:28:41,316 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:28:41,316 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:28:41,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-09 06:28:41,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:28:41,517 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:28:41,517 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:28:41,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1635797587, now seen corresponding path program 32 times [2024-11-09 06:28:41,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:28:41,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477222420] [2024-11-09 06:28:41,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:28:41,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:28:41,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:28:44,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 65 proven. 1008 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2024-11-09 06:28:44,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:28:44,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477222420] [2024-11-09 06:28:44,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477222420] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:28:44,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247253056] [2024-11-09 06:28:44,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:28:44,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:28:44,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:28:44,986 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:28:44,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-09 06:29:03,542 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2024-11-09 06:29:03,542 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:29:03,562 INFO L255 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 154 conjuncts are in the unsatisfiable core [2024-11-09 06:29:03,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:29:03,574 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 06:29:04,181 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 11 treesize of output 7 [2024-11-09 06:29:04,190 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 16 treesize of output 11 [2024-11-09 06:29:05,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 65 proven. 1008 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2024-11-09 06:29:05,670 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:29:05,848 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4208 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_4208) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 16 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2024-11-09 06:29:05,853 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:29:05,853 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 23 treesize of output 24 [2024-11-09 06:29:05,859 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:29:05,859 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 32 [2024-11-09 06:29:05,869 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 3 [2024-11-09 06:29:07,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 65 proven. 1008 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2024-11-09 06:29:07,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247253056] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:29:07,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [628097428] [2024-11-09 06:29:07,353 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:29:07,353 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:29:07,353 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:29:07,353 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:29:07,353 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:29:08,035 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:29:11,333 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '49234#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_870| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_860| Int)) (and (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_860|) 1) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_860|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_870|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= |v_ULTIMATE.start_cstrcmp_~s1#1.offset_870| (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_860|)) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_870|) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:29:11,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:29:11,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:29:11,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 78 [2024-11-09 06:29:11,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118109527] [2024-11-09 06:29:11,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:29:11,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2024-11-09 06:29:11,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:29:11,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2024-11-09 06:29:11,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=8125, Unknown=1, NotChecked=180, Total=8556 [2024-11-09 06:29:11,336 INFO L87 Difference]: Start difference. First operand 198 states and 200 transitions. Second operand has 79 states, 79 states have (on average 3.6962025316455698) internal successors, (292), 78 states have internal predecessors, (292), 0 states have call successors, (0), 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 06:29:15,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:29:15,945 INFO L93 Difference]: Finished difference Result 338 states and 341 transitions. [2024-11-09 06:29:15,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-09 06:29:15,946 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.6962025316455698) internal successors, (292), 78 states have internal predecessors, (292), 0 states have call successors, (0), 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 189 [2024-11-09 06:29:15,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:29:15,947 INFO L225 Difference]: With dead ends: 338 [2024-11-09 06:29:15,947 INFO L226 Difference]: Without dead ends: 203 [2024-11-09 06:29:15,948 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 511 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2007 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=330, Invalid=11229, Unknown=1, NotChecked=212, Total=11772 [2024-11-09 06:29:15,948 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 22 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 6489 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 6658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 6489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:29:15,949 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 1266 Invalid, 6658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 6489 Invalid, 0 Unknown, 151 Unchecked, 3.5s Time] [2024-11-09 06:29:15,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-11-09 06:29:15,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 201. [2024-11-09 06:29:15,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 198 states have (on average 1.0252525252525253) internal successors, (203), 200 states have internal predecessors, (203), 0 states have call successors, (0), 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 06:29:15,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 203 transitions. [2024-11-09 06:29:15,953 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 203 transitions. Word has length 189 [2024-11-09 06:29:15,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:29:15,953 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 203 transitions. [2024-11-09 06:29:15,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.6962025316455698) internal successors, (292), 78 states have internal predecessors, (292), 0 states have call successors, (0), 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 06:29:15,954 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 203 transitions. [2024-11-09 06:29:15,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2024-11-09 06:29:15,956 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:29:15,956 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:29:15,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2024-11-09 06:29:16,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:29:16,157 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:29:16,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:29:16,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1593792303, now seen corresponding path program 33 times [2024-11-09 06:29:16,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:29:16,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254228825] [2024-11-09 06:29:16,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:29:16,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:29:16,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:29:18,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1498 backedges. 330 proven. 792 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2024-11-09 06:29:18,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:29:18,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254228825] [2024-11-09 06:29:18,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254228825] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:29:18,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528117302] [2024-11-09 06:29:18,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:29:18,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:29:18,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:29:18,030 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:29:18,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-09 06:29:18,496 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:29:18,497 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:29:18,502 INFO L255 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 113 conjuncts are in the unsatisfiable core [2024-11-09 06:29:18,506 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:29:19,330 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 06:29:20,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1498 backedges. 17 proven. 1056 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-11-09 06:29:20,904 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:29:21,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-09 06:29:21,432 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 16 treesize of output 12 [2024-11-09 06:29:21,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1498 backedges. 17 proven. 1056 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-11-09 06:29:21,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528117302] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:29:21,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [334118017] [2024-11-09 06:29:21,687 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:29:21,687 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:29:21,687 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:29:21,687 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:29:21,687 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:29:22,376 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:29:26,199 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '51050#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_893| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_883| Int)) (and (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_883|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_893|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_883|) 1) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_893|) (= |v_ULTIMATE.start_cstrcmp_~s1#1.offset_893| (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_883|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:29:26,199 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:29:26,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:29:26,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 42, 42] total 84 [2024-11-09 06:29:26,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480083501] [2024-11-09 06:29:26,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:29:26,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-11-09 06:29:26,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:29:26,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-11-09 06:29:26,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=9159, Unknown=0, NotChecked=0, Total=9506 [2024-11-09 06:29:26,202 INFO L87 Difference]: Start difference. First operand 201 states and 203 transitions. Second operand has 84 states, 84 states have (on average 3.5595238095238093) internal successors, (299), 84 states have internal predecessors, (299), 0 states have call successors, (0), 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 06:29:35,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:29:35,706 INFO L93 Difference]: Finished difference Result 303 states and 306 transitions. [2024-11-09 06:29:35,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2024-11-09 06:29:35,707 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.5595238095238093) internal successors, (299), 84 states have internal predecessors, (299), 0 states have call successors, (0), 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 192 [2024-11-09 06:29:35,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:29:35,707 INFO L225 Difference]: With dead ends: 303 [2024-11-09 06:29:35,707 INFO L226 Difference]: Without dead ends: 215 [2024-11-09 06:29:35,708 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 512 SyntacticMatches, 3 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4777 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=678, Invalid=23814, Unknown=0, NotChecked=0, Total=24492 [2024-11-09 06:29:35,709 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 11539 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1273 SdHoareTripleChecker+Invalid, 11559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 11539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2024-11-09 06:29:35,709 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 1273 Invalid, 11559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 11539 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2024-11-09 06:29:35,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-11-09 06:29:35,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 206. [2024-11-09 06:29:35,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 203 states have (on average 1.0246305418719213) internal successors, (208), 205 states have internal predecessors, (208), 0 states have call successors, (0), 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 06:29:35,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 208 transitions. [2024-11-09 06:29:35,711 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 208 transitions. Word has length 192 [2024-11-09 06:29:35,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:29:35,711 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 208 transitions. [2024-11-09 06:29:35,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.5595238095238093) internal successors, (299), 84 states have internal predecessors, (299), 0 states have call successors, (0), 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 06:29:35,712 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 208 transitions. [2024-11-09 06:29:35,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2024-11-09 06:29:35,713 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:29:35,713 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:29:35,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-11-09 06:29:35,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:29:35,918 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:29:35,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:29:35,918 INFO L85 PathProgramCache]: Analyzing trace with hash 2049511881, now seen corresponding path program 17 times [2024-11-09 06:29:35,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:29:35,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152540690] [2024-11-09 06:29:35,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:29:35,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:29:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:29:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 330 proven. 843 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-11-09 06:29:38,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:29:38,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152540690] [2024-11-09 06:29:38,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152540690] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:29:38,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634366359] [2024-11-09 06:29:38,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:29:38,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:29:38,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:29:38,553 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:29:38,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-09 06:30:13,109 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2024-11-09 06:30:13,109 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:30:13,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-09 06:30:13,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:30:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 392 proven. 781 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-11-09 06:30:15,010 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:30:16,946 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 06:30:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 392 proven. 781 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-11-09 06:30:17,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634366359] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:30:17,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [574979486] [2024-11-09 06:30:17,617 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:30:17,617 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:30:17,618 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:30:17,618 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:30:17,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:30:18,457 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:30:21,018 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '52968#(and (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)))' at error location [2024-11-09 06:30:21,019 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:30:21,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:30:21,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38, 38] total 94 [2024-11-09 06:30:21,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504422202] [2024-11-09 06:30:21,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:30:21,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2024-11-09 06:30:21,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:30:21,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2024-11-09 06:30:21,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1474, Invalid=10081, Unknown=1, NotChecked=0, Total=11556 [2024-11-09 06:30:21,021 INFO L87 Difference]: Start difference. First operand 206 states and 208 transitions. Second operand has 95 states, 94 states have (on average 4.148936170212766) internal successors, (390), 95 states have internal predecessors, (390), 0 states have call successors, (0), 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 06:30:22,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:30:22,442 INFO L93 Difference]: Finished difference Result 213 states and 215 transitions. [2024-11-09 06:30:22,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-09 06:30:22,443 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 4.148936170212766) internal successors, (390), 95 states have internal predecessors, (390), 0 states have call successors, (0), 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 198 [2024-11-09 06:30:22,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:30:22,444 INFO L225 Difference]: With dead ends: 213 [2024-11-09 06:30:22,444 INFO L226 Difference]: Without dead ends: 210 [2024-11-09 06:30:22,445 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 503 SyntacticMatches, 20 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6528 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1512, Invalid=10259, Unknown=1, NotChecked=0, Total=11772 [2024-11-09 06:30:22,445 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 2626 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 2628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:30:22,445 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 583 Invalid, 2628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2626 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-09 06:30:22,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2024-11-09 06:30:22,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2024-11-09 06:30:22,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 206 states have (on average 1.0242718446601942) internal successors, (211), 208 states have internal predecessors, (211), 0 states have call successors, (0), 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 06:30:22,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2024-11-09 06:30:22,447 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 198 [2024-11-09 06:30:22,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:30:22,448 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2024-11-09 06:30:22,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 4.148936170212766) internal successors, (390), 95 states have internal predecessors, (390), 0 states have call successors, (0), 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 06:30:22,448 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2024-11-09 06:30:22,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2024-11-09 06:30:22,459 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:30:22,459 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:30:22,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-11-09 06:30:22,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:30:22,660 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:30:22,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:30:22,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1809035015, now seen corresponding path program 34 times [2024-11-09 06:30:22,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:30:22,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793716940] [2024-11-09 06:30:22,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:30:22,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:30:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:30:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 69 proven. 1139 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-11-09 06:30:26,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:30:26,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793716940] [2024-11-09 06:30:26,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793716940] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:30:26,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34588283] [2024-11-09 06:30:26,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:30:26,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:30:26,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:30:26,138 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:30:26,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-11-09 06:30:26,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:30:26,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 1014 conjuncts, 121 conjuncts are in the unsatisfiable core [2024-11-09 06:30:26,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:30:28,050 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 06:30:30,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 18 proven. 1190 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-11-09 06:30:30,255 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:30:30,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-09 06:30:30,892 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 16 treesize of output 12 [2024-11-09 06:30:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1633 backedges. 18 proven. 1190 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-11-09 06:30:31,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34588283] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:30:31,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [659169313] [2024-11-09 06:30:31,196 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:30:31,196 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:30:31,196 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:30:31,196 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:30:31,196 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:30:31,885 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:30:36,231 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '54687#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_929| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_939| Int)) (and (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_929|) 1) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_929|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_939|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_939|) (= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_929|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_939|) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:30:36,231 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:30:36,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:30:36,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 44, 44] total 88 [2024-11-09 06:30:36,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815125097] [2024-11-09 06:30:36,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:30:36,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2024-11-09 06:30:36,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:30:36,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2024-11-09 06:30:36,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=10066, Unknown=1, NotChecked=0, Total=10302 [2024-11-09 06:30:36,234 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand has 88 states, 88 states have (on average 3.534090909090909) internal successors, (311), 88 states have internal predecessors, (311), 0 states have call successors, (0), 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 06:30:48,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:30:48,593 INFO L93 Difference]: Finished difference Result 550 states and 553 transitions. [2024-11-09 06:30:48,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2024-11-09 06:30:48,593 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.534090909090909) internal successors, (311), 88 states have internal predecessors, (311), 0 states have call successors, (0), 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 200 [2024-11-09 06:30:48,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:30:48,594 INFO L225 Difference]: With dead ends: 550 [2024-11-09 06:30:48,594 INFO L226 Difference]: Without dead ends: 219 [2024-11-09 06:30:48,595 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 716 GetRequests, 536 SyntacticMatches, 3 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4099 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=635, Invalid=31226, Unknown=1, NotChecked=0, Total=31862 [2024-11-09 06:30:48,595 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 46 mSDsluCounter, 1730 mSDsCounter, 0 mSdLazyCounter, 15197 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1753 SdHoareTripleChecker+Invalid, 15232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 15197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:30:48,596 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 1753 Invalid, 15232 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [35 Valid, 15197 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2024-11-09 06:30:48,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-11-09 06:30:48,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 215. [2024-11-09 06:30:48,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 212 states have (on average 1.0235849056603774) internal successors, (217), 214 states have internal predecessors, (217), 0 states have call successors, (0), 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 06:30:48,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2024-11-09 06:30:48,599 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 200 [2024-11-09 06:30:48,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:30:48,600 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2024-11-09 06:30:48,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.534090909090909) internal successors, (311), 88 states have internal predecessors, (311), 0 states have call successors, (0), 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 06:30:48,600 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2024-11-09 06:30:48,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2024-11-09 06:30:48,601 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:30:48,601 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:30:48,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-11-09 06:30:48,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-11-09 06:30:48,802 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:30:48,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:30:48,802 INFO L85 PathProgramCache]: Analyzing trace with hash 585089688, now seen corresponding path program 35 times [2024-11-09 06:30:48,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:30:48,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654498214] [2024-11-09 06:30:48,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:30:48,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:30:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:30:50,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1737 backedges. 376 proven. 884 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2024-11-09 06:30:50,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:30:50,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654498214] [2024-11-09 06:30:50,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654498214] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:30:50,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83394508] [2024-11-09 06:30:50,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:30:50,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:30:50,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:30:50,728 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:30:50,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-11-09 06:31:14,881 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2024-11-09 06:31:14,881 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:31:14,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-11-09 06:31:14,905 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:31:14,910 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 06:31:17,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1737 backedges. 442 proven. 818 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2024-11-09 06:31:17,079 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:31:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1737 backedges. 442 proven. 818 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2024-11-09 06:31:21,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83394508] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:31:21,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1417025260] [2024-11-09 06:31:21,053 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:31:21,053 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:31:21,053 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:31:21,053 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:31:21,054 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:31:21,989 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:31:25,590 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '56971#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_980| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_970| Int)) (and (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_970|) 1) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_970|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_980|) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_970|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_980|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_980|) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:31:25,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:31:25,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:31:25,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40, 40] total 119 [2024-11-09 06:31:25,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988056811] [2024-11-09 06:31:25,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:31:25,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2024-11-09 06:31:25,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:31:25,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2024-11-09 06:31:25,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2172, Invalid=15917, Unknown=1, NotChecked=0, Total=18090 [2024-11-09 06:31:25,594 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand has 121 states, 120 states have (on average 3.875) internal successors, (465), 120 states have internal predecessors, (465), 0 states have call successors, (0), 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 06:31:27,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:31:27,955 INFO L93 Difference]: Finished difference Result 224 states and 227 transitions. [2024-11-09 06:31:27,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-09 06:31:27,956 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 120 states have (on average 3.875) internal successors, (465), 120 states have internal predecessors, (465), 0 states have call successors, (0), 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 206 [2024-11-09 06:31:27,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:31:27,956 INFO L225 Difference]: With dead ends: 224 [2024-11-09 06:31:27,957 INFO L226 Difference]: Without dead ends: 224 [2024-11-09 06:31:27,958 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 520 SyntacticMatches, 2 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8260 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=2230, Invalid=16129, Unknown=1, NotChecked=0, Total=18360 [2024-11-09 06:31:27,958 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 15 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 3489 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 3490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:31:27,958 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 682 Invalid, 3490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3489 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-09 06:31:27,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-11-09 06:31:27,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 217. [2024-11-09 06:31:27,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 214 states have (on average 1.0233644859813085) internal successors, (219), 216 states have internal predecessors, (219), 0 states have call successors, (0), 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 06:31:27,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2024-11-09 06:31:27,962 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 206 [2024-11-09 06:31:27,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:31:27,962 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2024-11-09 06:31:27,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 120 states have (on average 3.875) internal successors, (465), 120 states have internal predecessors, (465), 0 states have call successors, (0), 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 06:31:27,962 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2024-11-09 06:31:27,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2024-11-09 06:31:27,963 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:31:27,964 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:31:27,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2024-11-09 06:31:28,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-11-09 06:31:28,164 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:31:28,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:31:28,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1430984419, now seen corresponding path program 18 times [2024-11-09 06:31:28,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:31:28,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95131256] [2024-11-09 06:31:28,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:31:28,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:31:28,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:31:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 376 proven. 938 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2024-11-09 06:31:30,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:31:30,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95131256] [2024-11-09 06:31:30,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95131256] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:31:30,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036126664] [2024-11-09 06:31:30,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:31:30,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:31:30,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:31:30,486 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:31:30,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-11-09 06:31:31,116 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:31:31,116 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:31:31,122 INFO L255 TraceCheckSpWp]: Trace formula consists of 908 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-09 06:31:31,124 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:31:32,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 425 proven. 889 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2024-11-09 06:31:32,160 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:31:33,434 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 5 treesize of output 3 [2024-11-09 06:31:34,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 425 proven. 889 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2024-11-09 06:31:34,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036126664] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:31:34,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1292031666] [2024-11-09 06:31:34,133 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:31:34,134 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:31:34,134 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:31:34,134 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:31:34,134 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:31:34,964 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:31:37,463 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '58758#(and (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)))' at error location [2024-11-09 06:31:37,464 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:31:37,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:31:37,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40, 40] total 81 [2024-11-09 06:31:37,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543051079] [2024-11-09 06:31:37,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:31:37,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-11-09 06:31:37,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:31:37,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-11-09 06:31:37,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=914, Invalid=8206, Unknown=0, NotChecked=0, Total=9120 [2024-11-09 06:31:37,466 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand has 82 states, 81 states have (on average 3.9753086419753085) internal successors, (322), 82 states have internal predecessors, (322), 0 states have call successors, (0), 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 06:31:39,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:31:39,757 INFO L93 Difference]: Finished difference Result 224 states and 226 transitions. [2024-11-09 06:31:39,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-09 06:31:39,758 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 3.9753086419753085) internal successors, (322), 82 states have internal predecessors, (322), 0 states have call successors, (0), 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 209 [2024-11-09 06:31:39,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:31:39,758 INFO L225 Difference]: With dead ends: 224 [2024-11-09 06:31:39,758 INFO L226 Difference]: Without dead ends: 221 [2024-11-09 06:31:39,759 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 665 GetRequests, 549 SyntacticMatches, 21 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5110 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=954, Invalid=8358, Unknown=0, NotChecked=0, Total=9312 [2024-11-09 06:31:39,759 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 10 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 3854 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 3856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:31:39,759 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 758 Invalid, 3856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3854 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-09 06:31:39,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2024-11-09 06:31:39,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2024-11-09 06:31:39,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 217 states have (on average 1.023041474654378) internal successors, (222), 219 states have internal predecessors, (222), 0 states have call successors, (0), 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 06:31:39,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2024-11-09 06:31:39,763 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 209 [2024-11-09 06:31:39,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:31:39,763 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2024-11-09 06:31:39,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 3.9753086419753085) internal successors, (322), 82 states have internal predecessors, (322), 0 states have call successors, (0), 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 06:31:39,763 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2024-11-09 06:31:39,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2024-11-09 06:31:39,764 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:31:39,765 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:31:39,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-11-09 06:31:39,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2024-11-09 06:31:39,965 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:31:39,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:31:39,966 INFO L85 PathProgramCache]: Analyzing trace with hash 786528147, now seen corresponding path program 36 times [2024-11-09 06:31:39,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:31:39,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120110501] [2024-11-09 06:31:39,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:31:39,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:31:40,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:31:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 73 proven. 1278 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2024-11-09 06:31:43,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:31:43,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120110501] [2024-11-09 06:31:43,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120110501] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:31:43,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920644584] [2024-11-09 06:31:43,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:31:43,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:31:43,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:31:43,392 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:31:43,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-11-09 06:31:43,994 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:31:43,994 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:31:44,000 INFO L255 TraceCheckSpWp]: Trace formula consists of 922 conjuncts, 125 conjuncts are in the unsatisfiable core [2024-11-09 06:31:44,004 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:31:45,398 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 06:31:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 19 proven. 1332 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2024-11-09 06:31:47,723 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:31:48,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-09 06:31:48,344 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 16 treesize of output 12 [2024-11-09 06:31:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 19 proven. 1332 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2024-11-09 06:31:48,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920644584] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:31:48,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1966015131] [2024-11-09 06:31:48,597 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:31:48,597 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:31:48,597 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:31:48,598 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:31:48,598 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:31:49,147 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:31:53,382 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '60570#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_1018| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_1028| Int)) (and (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|)) (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_1018|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_1028|))) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_1028|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_1018|) 1) (= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_1018|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_1028|) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:31:53,382 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:31:53,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:31:53,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 46, 46] total 92 [2024-11-09 06:31:53,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664142000] [2024-11-09 06:31:53,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:31:53,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-11-09 06:31:53,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:31:53,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-11-09 06:31:53,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=10886, Unknown=0, NotChecked=0, Total=11130 [2024-11-09 06:31:53,385 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand has 92 states, 92 states have (on average 3.5543478260869565) internal successors, (327), 92 states have internal predecessors, (327), 0 states have call successors, (0), 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 06:32:08,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:32:08,626 INFO L93 Difference]: Finished difference Result 579 states and 582 transitions. [2024-11-09 06:32:08,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2024-11-09 06:32:08,626 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.5543478260869565) internal successors, (327), 92 states have internal predecessors, (327), 0 states have call successors, (0), 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 211 [2024-11-09 06:32:08,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:32:08,628 INFO L225 Difference]: With dead ends: 579 [2024-11-09 06:32:08,628 INFO L226 Difference]: Without dead ends: 230 [2024-11-09 06:32:08,630 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 755 GetRequests, 567 SyntacticMatches, 3 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4544 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=664, Invalid=34118, Unknown=0, NotChecked=0, Total=34782 [2024-11-09 06:32:08,631 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 1852 mSDsCounter, 0 mSdLazyCounter, 16561 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1876 SdHoareTripleChecker+Invalid, 16598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 16561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2024-11-09 06:32:08,631 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1876 Invalid, 16598 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [37 Valid, 16561 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2024-11-09 06:32:08,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2024-11-09 06:32:08,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 226. [2024-11-09 06:32:08,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 223 states have (on average 1.0224215246636772) internal successors, (228), 225 states have internal predecessors, (228), 0 states have call successors, (0), 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 06:32:08,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 228 transitions. [2024-11-09 06:32:08,636 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 228 transitions. Word has length 211 [2024-11-09 06:32:08,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:32:08,636 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 228 transitions. [2024-11-09 06:32:08,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.5543478260869565) internal successors, (327), 92 states have internal predecessors, (327), 0 states have call successors, (0), 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 06:32:08,637 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 228 transitions. [2024-11-09 06:32:08,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2024-11-09 06:32:08,638 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:32:08,638 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:32:08,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2024-11-09 06:32:08,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:32:08,839 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:32:08,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:32:08,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1926053710, now seen corresponding path program 37 times [2024-11-09 06:32:08,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:32:08,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040804620] [2024-11-09 06:32:08,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:32:08,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:32:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:32:11,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 425 proven. 981 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2024-11-09 06:32:11,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:32:11,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040804620] [2024-11-09 06:32:11,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040804620] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:32:11,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145673842] [2024-11-09 06:32:11,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:32:11,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:32:11,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:32:11,878 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:32:11,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-11-09 06:32:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:32:12,566 INFO L255 TraceCheckSpWp]: Trace formula consists of 1096 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-11-09 06:32:12,571 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:32:14,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 477 proven. 929 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2024-11-09 06:32:14,215 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:32:15,724 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 5 treesize of output 3 [2024-11-09 06:32:16,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 477 proven. 929 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2024-11-09 06:32:16,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145673842] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:32:16,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [663682015] [2024-11-09 06:32:16,569 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:32:16,569 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:32:16,569 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:32:16,569 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:32:16,570 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:32:17,407 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:32:20,070 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '62935#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_1072| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.base_1062| Int)) (and (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_1072|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_1062|) 1) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_1062|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_1072|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_1062|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_1072|) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:32:20,070 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:32:20,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:32:20,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42, 42] total 86 [2024-11-09 06:32:20,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482362526] [2024-11-09 06:32:20,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:32:20,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2024-11-09 06:32:20,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:32:20,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2024-11-09 06:32:20,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=999, Invalid=9302, Unknown=1, NotChecked=0, Total=10302 [2024-11-09 06:32:20,073 INFO L87 Difference]: Start difference. First operand 226 states and 228 transitions. Second operand has 88 states, 87 states have (on average 3.8275862068965516) internal successors, (333), 87 states have internal predecessors, (333), 0 states have call successors, (0), 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 06:32:22,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:32:22,401 INFO L93 Difference]: Finished difference Result 235 states and 238 transitions. [2024-11-09 06:32:22,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-09 06:32:22,401 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 3.8275862068965516) internal successors, (333), 87 states have internal predecessors, (333), 0 states have call successors, (0), 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 217 [2024-11-09 06:32:22,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:32:22,403 INFO L225 Difference]: With dead ends: 235 [2024-11-09 06:32:22,403 INFO L226 Difference]: Without dead ends: 235 [2024-11-09 06:32:22,404 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 568 SyntacticMatches, 22 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5529 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1040, Invalid=9465, Unknown=1, NotChecked=0, Total=10506 [2024-11-09 06:32:22,404 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 22 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 4618 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 4619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:32:22,404 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 839 Invalid, 4619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4618 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-09 06:32:22,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-11-09 06:32:22,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 228. [2024-11-09 06:32:22,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 225 states have (on average 1.0222222222222221) internal successors, (230), 227 states have internal predecessors, (230), 0 states have call successors, (0), 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 06:32:22,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 230 transitions. [2024-11-09 06:32:22,408 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 230 transitions. Word has length 217 [2024-11-09 06:32:22,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:32:22,409 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 230 transitions. [2024-11-09 06:32:22,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 87 states have (on average 3.8275862068965516) internal successors, (333), 87 states have internal predecessors, (333), 0 states have call successors, (0), 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 06:32:22,409 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 230 transitions. [2024-11-09 06:32:22,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2024-11-09 06:32:22,411 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:32:22,411 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:32:22,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2024-11-09 06:32:22,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:32:22,616 INFO L396 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:32:22,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:32:22,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1698376329, now seen corresponding path program 19 times [2024-11-09 06:32:22,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:32:22,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269432616] [2024-11-09 06:32:22,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:32:22,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:32:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:32:25,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1995 backedges. 425 proven. 1038 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2024-11-09 06:32:25,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:32:25,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269432616] [2024-11-09 06:32:25,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269432616] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:32:25,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903154546] [2024-11-09 06:32:25,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:32:25,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:32:25,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:32:25,418 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:32:25,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-11-09 06:32:25,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:32:25,931 INFO L255 TraceCheckSpWp]: Trace formula consists of 1108 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-11-09 06:32:25,934 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:32:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1995 backedges. 477 proven. 986 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2024-11-09 06:32:27,072 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:32:28,669 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 5 treesize of output 3 [2024-11-09 06:32:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1995 backedges. 477 proven. 986 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2024-11-09 06:32:29,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903154546] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:32:29,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1697495640] [2024-11-09 06:32:29,483 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:32:29,483 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:32:29,484 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:32:29,484 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:32:29,484 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:32:30,161 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:32:32,496 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '64814#(and (<= 0 |ULTIMATE.start_cstrcmp_~s1#1.offset|) (<= (+ |ULTIMATE.start_cstrcmp_~s1#1.offset| 1) (select |#length| |ULTIMATE.start_cstrcmp_~s1#1.base|)) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s1#1.base|) 1) (= |ULTIMATE.start_cstrcmp_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s1#1.base|) |ULTIMATE.start_cstrcmp_~s1#1.offset|)))' at error location [2024-11-09 06:32:32,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:32:32,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:32:32,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42, 42] total 85 [2024-11-09 06:32:32,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613246154] [2024-11-09 06:32:32,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:32:32,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-11-09 06:32:32,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:32:32,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-11-09 06:32:32,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=986, Invalid=8715, Unknown=1, NotChecked=0, Total=9702 [2024-11-09 06:32:32,498 INFO L87 Difference]: Start difference. First operand 228 states and 230 transitions. Second operand has 86 states, 85 states have (on average 3.976470588235294) internal successors, (338), 86 states have internal predecessors, (338), 0 states have call successors, (0), 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 06:32:35,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:32:35,089 INFO L93 Difference]: Finished difference Result 235 states and 237 transitions. [2024-11-09 06:32:35,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-09 06:32:35,089 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 3.976470588235294) internal successors, (338), 86 states have internal predecessors, (338), 0 states have call successors, (0), 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 220 [2024-11-09 06:32:35,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:32:35,090 INFO L225 Difference]: With dead ends: 235 [2024-11-09 06:32:35,090 INFO L226 Difference]: Without dead ends: 232 [2024-11-09 06:32:35,091 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 580 SyntacticMatches, 22 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5488 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1028, Invalid=8871, Unknown=1, NotChecked=0, Total=9900 [2024-11-09 06:32:35,092 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 6 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 4477 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 4479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:32:35,092 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 851 Invalid, 4479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4477 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-09 06:32:35,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-11-09 06:32:35,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2024-11-09 06:32:35,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 228 states have (on average 1.0219298245614035) internal successors, (233), 230 states have internal predecessors, (233), 0 states have call successors, (0), 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 06:32:35,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2024-11-09 06:32:35,095 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 220 [2024-11-09 06:32:35,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:32:35,096 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2024-11-09 06:32:35,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 3.976470588235294) internal successors, (338), 86 states have internal predecessors, (338), 0 states have call successors, (0), 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 06:32:35,096 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2024-11-09 06:32:35,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2024-11-09 06:32:35,097 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:32:35,097 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:32:35,119 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2024-11-09 06:32:35,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:32:35,298 INFO L396 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 06:32:35,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:32:35,298 INFO L85 PathProgramCache]: Analyzing trace with hash 52115897, now seen corresponding path program 38 times [2024-11-09 06:32:35,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:32:35,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393852836] [2024-11-09 06:32:35,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:32:35,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:32:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:32:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2034 backedges. 77 proven. 1425 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2024-11-09 06:32:39,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:32:39,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393852836] [2024-11-09 06:32:39,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393852836] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:32:39,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221233787] [2024-11-09 06:32:39,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:32:39,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:32:39,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:32:39,012 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:32:39,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_49cfc5b7-a5f7-45a2-ab8d-627853735aea/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-11-09 06:33:10,614 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2024-11-09 06:33:10,614 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:33:10,647 INFO L255 TraceCheckSpWp]: Trace formula consists of 1122 conjuncts, 219 conjuncts are in the unsatisfiable core [2024-11-09 06:33:10,650 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:33:14,299 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 11 treesize of output 7 [2024-11-09 06:33:17,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2034 backedges. 20 proven. 2014 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:33:17,152 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:33:22,082 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:33:22,082 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 99 treesize of output 99 [2024-11-09 06:33:22,101 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 30 treesize of output 26 [2024-11-09 06:33:22,114 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 06:33:22,114 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 45 treesize of output 37 [2024-11-09 06:33:24,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2034 backedges. 20 proven. 1482 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2024-11-09 06:33:24,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221233787] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:33:24,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [821341377] [2024-11-09 06:33:24,709 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2024-11-09 06:33:24,709 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:33:24,709 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:33:24,709 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:33:24,710 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:33:25,438 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:33:31,308 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '66779#(exists ((|v_ULTIMATE.start_cstrcmp_~s1#1.base_1111| Int) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_1140| Int)) (and (= (select |#length| |v_ULTIMATE.start_cstrcmp_~s1#1.base_1111|) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_1140|) (<= |ULTIMATE.start_cstrcmp_~s2#1.offset| (select |#length| |ULTIMATE.start_cstrcmp_~s2#1.base|)) (= (select (select |#memory_int| |v_ULTIMATE.start_cstrcmp_~s1#1.base_1111|) (+ (- 1) |v_ULTIMATE.start_cstrcmp_~s1#1.offset_1140|)) (select (select |#memory_int| |ULTIMATE.start_cstrcmp_~s2#1.base|) (+ (- 1) |ULTIMATE.start_cstrcmp_~s2#1.offset|))) (<= 1 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_1140|) (<= 1 |ULTIMATE.start_cstrcmp_~s2#1.offset|) (= (select |#valid| |v_ULTIMATE.start_cstrcmp_~s1#1.base_1111|) 1) (= (select |#valid| |ULTIMATE.start_cstrcmp_~s2#1.base|) 1)))' at error location [2024-11-09 06:33:31,309 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:33:31,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:33:31,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 69, 48] total 158 [2024-11-09 06:33:31,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699066669] [2024-11-09 06:33:31,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:33:31,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2024-11-09 06:33:31,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:33:31,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2024-11-09 06:33:31,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=28916, Unknown=1, NotChecked=0, Total=29412 [2024-11-09 06:33:31,313 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand has 158 states, 158 states have (on average 3.5126582278481013) internal successors, (555), 158 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)