./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/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_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/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_ea02c5ce-c3a2-482c-8100-16046caeb7bf/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 a775ba6b744ab5ffb556747687a592ac2a696b9fe34bb3e21dc1471ba5c99e1a --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 07:10:18,107 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 07:10:18,220 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-09 07:10:18,227 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 07:10:18,228 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 07:10:18,263 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 07:10:18,266 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 07:10:18,267 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 07:10:18,268 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 07:10:18,269 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 07:10:18,269 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 07:10:18,270 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 07:10:18,270 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 07:10:18,270 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 07:10:18,271 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 07:10:18,273 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 07:10:18,273 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 07:10:18,274 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 07:10:18,274 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 07:10:18,274 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 07:10:18,275 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 07:10:18,279 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 07:10:18,279 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 07:10:18,280 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 07:10:18,280 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 07:10:18,280 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 07:10:18,281 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 07:10:18,281 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 07:10:18,281 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 07:10:18,281 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 07:10:18,282 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 07:10:18,282 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 07:10:18,282 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 07:10:18,282 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 07:10:18,285 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 07:10:18,285 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 07:10:18,285 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 07:10:18,286 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 07:10:18,286 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 07:10:18,287 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 07:10:18,287 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 07:10:18,288 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:10:18,288 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 07:10:18,288 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 07:10:18,288 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 07:10:18,289 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 07:10:18,289 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 07:10:18,289 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 07:10:18,290 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 07:10:18,290 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_ea02c5ce-c3a2-482c-8100-16046caeb7bf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a775ba6b744ab5ffb556747687a592ac2a696b9fe34bb3e21dc1471ba5c99e1a [2024-11-09 07:10:18,590 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 07:10:18,620 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 07:10:18,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 07:10:18,624 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 07:10:18,624 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 07:10:18,627 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i Unable to find full path for "g++" [2024-11-09 07:10:20,536 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 07:10:20,941 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 07:10:20,945 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i [2024-11-09 07:10:20,957 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/data/47288448c/d2775863be114fb9b018b299861b82ec/FLAG52852a426 [2024-11-09 07:10:21,160 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/data/47288448c/d2775863be114fb9b018b299861b82ec [2024-11-09 07:10:21,164 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 07:10:21,166 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 07:10:21,169 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 07:10:21,169 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 07:10:21,180 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 07:10:21,183 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:10:21" (1/1) ... [2024-11-09 07:10:21,184 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@194f402 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:21, skipping insertion in model container [2024-11-09 07:10:21,184 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:10:21" (1/1) ... [2024-11-09 07:10:21,243 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 07:10:21,701 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 07:10:21,702 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 07:10:21,707 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:10:21,722 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 07:10:21,773 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:10:21,803 INFO L204 MainTranslator]: Completed translation [2024-11-09 07:10:21,804 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:21 WrapperNode [2024-11-09 07:10:21,804 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 07:10:21,805 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 07:10:21,806 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 07:10:21,806 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 07:10:21,814 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:21" (1/1) ... [2024-11-09 07:10:21,828 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:21" (1/1) ... [2024-11-09 07:10:21,854 INFO L138 Inliner]: procedures = 117, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 101 [2024-11-09 07:10:21,855 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 07:10:21,856 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 07:10:21,856 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 07:10:21,856 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 07:10:21,865 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:21" (1/1) ... [2024-11-09 07:10:21,865 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:21" (1/1) ... [2024-11-09 07:10:21,869 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:21" (1/1) ... [2024-11-09 07:10:21,869 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:21" (1/1) ... [2024-11-09 07:10:21,881 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:21" (1/1) ... [2024-11-09 07:10:21,892 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:21" (1/1) ... [2024-11-09 07:10:21,893 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:21" (1/1) ... [2024-11-09 07:10:21,894 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:21" (1/1) ... [2024-11-09 07:10:21,901 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 07:10:21,902 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 07:10:21,902 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 07:10:21,902 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 07:10:21,907 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:21" (1/1) ... [2024-11-09 07:10:21,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:10:21,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:10:21,956 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 07:10:21,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 07:10:22,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 07:10:22,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 07:10:22,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 07:10:22,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 07:10:22,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 07:10:22,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 07:10:22,154 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 07:10:22,156 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 07:10:22,513 INFO L? ?]: Removed 69 outVars from TransFormulas that were not future-live. [2024-11-09 07:10:22,514 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 07:10:22,593 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 07:10:22,596 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-09 07:10:22,596 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:10:22 BoogieIcfgContainer [2024-11-09 07:10:22,597 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 07:10:22,600 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 07:10:22,600 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 07:10:22,605 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 07:10:22,605 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 07:10:21" (1/3) ... [2024-11-09 07:10:22,606 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e976b8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:10:22, skipping insertion in model container [2024-11-09 07:10:22,606 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:10:21" (2/3) ... [2024-11-09 07:10:22,609 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e976b8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:10:22, skipping insertion in model container [2024-11-09 07:10:22,609 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:10:22" (3/3) ... [2024-11-09 07:10:22,612 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrlcpy-alloca-1.i [2024-11-09 07:10:22,637 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 07:10:22,638 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2024-11-09 07:10:22,711 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 07:10:22,718 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;@39f4e967, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 07:10:22,718 INFO L334 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2024-11-09 07:10:22,722 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 25 states have (on average 2.16) internal successors, (54), 42 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 07:10:22,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-09 07:10:22,728 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:22,728 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-09 07:10:22,729 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:22,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:22,750 INFO L85 PathProgramCache]: Analyzing trace with hash 4874962, now seen corresponding path program 1 times [2024-11-09 07:10:22,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:22,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092238909] [2024-11-09 07:10:22,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:22,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:22,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:23,038 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 07:10:23,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:23,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092238909] [2024-11-09 07:10:23,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092238909] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:23,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:10:23,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 07:10:23,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574316079] [2024-11-09 07:10:23,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:23,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:10:23,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:23,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:10:23,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:10:23,086 INFO L87 Difference]: Start difference. First operand has 43 states, 25 states have (on average 2.16) internal successors, (54), 42 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) 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 07:10:23,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:23,160 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2024-11-09 07:10:23,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:10:23,162 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 07:10:23,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:23,170 INFO L225 Difference]: With dead ends: 41 [2024-11-09 07:10:23,170 INFO L226 Difference]: Without dead ends: 40 [2024-11-09 07:10:23,171 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 07:10:23,175 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 15 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 57 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 07:10:23,176 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 57 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:10:23,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-09 07:10:23,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-09 07:10:23,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.96) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:23,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2024-11-09 07:10:23,210 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 4 [2024-11-09 07:10:23,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:23,210 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2024-11-09 07:10:23,211 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 07:10:23,211 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2024-11-09 07:10:23,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-09 07:10:23,211 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:23,211 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-09 07:10:23,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 07:10:23,212 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:23,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:23,213 INFO L85 PathProgramCache]: Analyzing trace with hash 4874963, now seen corresponding path program 1 times [2024-11-09 07:10:23,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:23,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445915272] [2024-11-09 07:10:23,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:23,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:23,668 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 07:10:23,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:23,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445915272] [2024-11-09 07:10:23,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445915272] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:23,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:10:23,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:10:23,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265000677] [2024-11-09 07:10:23,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:23,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:10:23,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:23,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:10:23,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:10:23,675 INFO L87 Difference]: Start difference. First operand 40 states and 49 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 07:10:23,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:23,867 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2024-11-09 07:10:23,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 07:10:23,871 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 07:10:23,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:23,873 INFO L225 Difference]: With dead ends: 43 [2024-11-09 07:10:23,873 INFO L226 Difference]: Without dead ends: 43 [2024-11-09 07:10:23,874 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 07:10:23,875 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 3 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:23,876 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 118 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:10:23,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-09 07:10:23,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-09 07:10:23,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 42 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 07:10:23,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2024-11-09 07:10:23,883 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 4 [2024-11-09 07:10:23,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:23,886 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2024-11-09 07:10:23,886 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 07:10:23,886 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2024-11-09 07:10:23,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 07:10:23,887 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:23,887 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 07:10:23,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 07:10:23,887 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:23,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:23,889 INFO L85 PathProgramCache]: Analyzing trace with hash 400279169, now seen corresponding path program 1 times [2024-11-09 07:10:23,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:23,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915482197] [2024-11-09 07:10:23,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:23,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:24,335 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 07:10:24,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:24,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915482197] [2024-11-09 07:10:24,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915482197] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:24,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:10:24,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 07:10:24,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460213735] [2024-11-09 07:10:24,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:24,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 07:10:24,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:24,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 07:10:24,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:10:24,339 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:24,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:24,439 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2024-11-09 07:10:24,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 07:10:24,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-09 07:10:24,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:24,441 INFO L225 Difference]: With dead ends: 41 [2024-11-09 07:10:24,441 INFO L226 Difference]: Without dead ends: 41 [2024-11-09 07:10:24,441 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:10:24,442 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 18 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:24,443 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 76 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:10:24,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-09 07:10:24,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-11-09 07:10:24,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 40 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 07:10:24,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2024-11-09 07:10:24,448 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 6 [2024-11-09 07:10:24,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:24,448 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2024-11-09 07:10:24,448 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:24,448 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2024-11-09 07:10:24,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 07:10:24,449 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:24,449 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 07:10:24,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 07:10:24,450 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:24,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:24,450 INFO L85 PathProgramCache]: Analyzing trace with hash 400279170, now seen corresponding path program 1 times [2024-11-09 07:10:24,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:24,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861056675] [2024-11-09 07:10:24,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:24,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:24,771 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 07:10:24,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:24,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861056675] [2024-11-09 07:10:24,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861056675] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:24,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:10:24,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 07:10:24,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842548576] [2024-11-09 07:10:24,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:24,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 07:10:24,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:24,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 07:10:24,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:10:24,775 INFO L87 Difference]: Start difference. First operand 41 states and 52 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 07:10:24,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:24,899 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2024-11-09 07:10:24,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 07:10:24,900 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 07:10:24,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:24,901 INFO L225 Difference]: With dead ends: 44 [2024-11-09 07:10:24,903 INFO L226 Difference]: Without dead ends: 44 [2024-11-09 07:10:24,903 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 07:10:24,906 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 17 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:24,909 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 98 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:10:24,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-09 07:10:24,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-11-09 07:10:24,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 43 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:24,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2024-11-09 07:10:24,920 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 6 [2024-11-09 07:10:24,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:24,920 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2024-11-09 07:10:24,921 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 07:10:24,921 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2024-11-09 07:10:24,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 07:10:24,923 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:24,923 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 07:10:24,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 07:10:24,924 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:24,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:24,925 INFO L85 PathProgramCache]: Analyzing trace with hash 400289997, now seen corresponding path program 1 times [2024-11-09 07:10:24,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:24,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84691476] [2024-11-09 07:10:24,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:24,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:25,225 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 07:10:25,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:25,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84691476] [2024-11-09 07:10:25,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84691476] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:25,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:10:25,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:10:25,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424833864] [2024-11-09 07:10:25,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:25,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:10:25,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:25,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:10:25,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:10:25,231 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:25,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:25,321 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2024-11-09 07:10:25,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:10:25,322 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-09 07:10:25,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:25,323 INFO L225 Difference]: With dead ends: 43 [2024-11-09 07:10:25,323 INFO L226 Difference]: Without dead ends: 43 [2024-11-09 07:10:25,323 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 07:10:25,324 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 25 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:25,325 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 71 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:10:25,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-09 07:10:25,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-09 07:10:25,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 42 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 07:10:25,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2024-11-09 07:10:25,333 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 6 [2024-11-09 07:10:25,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:25,334 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2024-11-09 07:10:25,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:25,334 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2024-11-09 07:10:25,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 07:10:25,335 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:25,335 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2024-11-09 07:10:25,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 07:10:25,335 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:25,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:25,340 INFO L85 PathProgramCache]: Analyzing trace with hash -795867201, now seen corresponding path program 1 times [2024-11-09 07:10:25,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:25,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408306051] [2024-11-09 07:10:25,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:25,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:25,604 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 07:10:25,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:25,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408306051] [2024-11-09 07:10:25,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408306051] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:10:25,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187335630] [2024-11-09 07:10:25,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:25,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:25,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:10:25,608 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:10:25,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 07:10:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:25,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 07:10:25,709 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:10:25,820 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 07:10:25,833 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 8 treesize of output 1 [2024-11-09 07:10:26,040 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 07:10:26,042 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:10:26,241 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 07:10:26,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187335630] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:10:26,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1178124608] [2024-11-09 07:10:26,267 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2024-11-09 07:10:26,267 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:10:26,272 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:10:26,279 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:10:26,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:10:27,244 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:10:27,611 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '544#(and (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet12#1|)) (exists ((|v_ULTIMATE.start_main_~nondetString2~0#1.offset_27| Int) (|v_ULTIMATE.start_main_~i~0#1_34| Int) (|v_ULTIMATE.start_main_~nondetString2~0#1.base_29| Int)) (and (<= |ULTIMATE.start_main_~length~0#1| 2147483647) (<= 1 |#StackHeapBarrier|) (<= (select |#length| |v_ULTIMATE.start_main_~nondetString2~0#1.base_29|) |v_ULTIMATE.start_main_~i~0#1_34|) (<= 0 |v_ULTIMATE.start_main_~i~0#1_34|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |v_ULTIMATE.start_main_~nondetString2~0#1.base_29|) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= (+ |v_ULTIMATE.start_main_~i~0#1_34| 2) |ULTIMATE.start_main_~length~0#1|) (= |v_ULTIMATE.start_main_~nondetString2~0#1.offset_27| 0) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|))) (<= |ULTIMATE.start_main_#t~nondet12#1| 127))' at error location [2024-11-09 07:10:27,612 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:10:27,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:10:27,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-09 07:10:27,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331591505] [2024-11-09 07:10:27,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:10:27,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 07:10:27,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:27,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 07:10:27,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-11-09 07:10:27,614 INFO L87 Difference]: Start difference. First operand 43 states and 55 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 07:10:27,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:27,827 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2024-11-09 07:10:27,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 07:10:27,828 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 07:10:27,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:27,829 INFO L225 Difference]: With dead ends: 43 [2024-11-09 07:10:27,829 INFO L226 Difference]: Without dead ends: 43 [2024-11-09 07:10:27,829 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 07:10:27,830 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:27,831 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 132 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:10:27,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-09 07:10:27,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2024-11-09 07:10:27,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 40 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 07:10:27,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2024-11-09 07:10:27,834 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 7 [2024-11-09 07:10:27,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:27,835 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2024-11-09 07:10:27,835 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 07:10:27,835 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2024-11-09 07:10:27,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 07:10:27,836 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:27,836 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:27,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 07:10:28,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:28,041 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:28,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:28,041 INFO L85 PathProgramCache]: Analyzing trace with hash -475911988, now seen corresponding path program 1 times [2024-11-09 07:10:28,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:28,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116045257] [2024-11-09 07:10:28,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:28,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:28,211 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 07:10:28,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:28,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116045257] [2024-11-09 07:10:28,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116045257] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:28,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:10:28,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 07:10:28,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641417588] [2024-11-09 07:10:28,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:28,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 07:10:28,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:28,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 07:10:28,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:10:28,213 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:28,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:28,275 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2024-11-09 07:10:28,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:10:28,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 07:10:28,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:28,277 INFO L225 Difference]: With dead ends: 40 [2024-11-09 07:10:28,277 INFO L226 Difference]: Without dead ends: 40 [2024-11-09 07:10:28,277 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:10:28,278 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 18 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:28,278 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 52 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:10:28,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-09 07:10:28,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-09 07:10:28,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.7) internal successors, (51), 39 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:28,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2024-11-09 07:10:28,282 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 7 [2024-11-09 07:10:28,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:28,282 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2024-11-09 07:10:28,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:28,282 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2024-11-09 07:10:28,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 07:10:28,283 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:28,283 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-09 07:10:28,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 07:10:28,283 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:28,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:28,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1889988756, now seen corresponding path program 1 times [2024-11-09 07:10:28,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:28,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347312944] [2024-11-09 07:10:28,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:28,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:28,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:28,623 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 07:10:28,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:28,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347312944] [2024-11-09 07:10:28,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347312944] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:10:28,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222811832] [2024-11-09 07:10:28,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:28,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:28,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:10:28,627 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:10:28,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 07:10:28,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:28,697 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 07:10:28,699 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:10:28,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:10:28,737 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 07:10:28,747 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 07:10:28,946 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 07:10:28,946 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:10:29,184 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 07:10:29,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222811832] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:10:29,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [661253022] [2024-11-09 07:10:29,186 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-09 07:10:29,186 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:10:29,186 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:10:29,187 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:10:29,187 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:10:29,871 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:10:30,753 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '785#(exists ((|v_ULTIMATE.start_main_~nondetString1~0#1.offset_27| Int) (|v_ULTIMATE.start_main_~i~1#1_32| 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~1#1_32|) (<= |ULTIMATE.start_main_~length~0#1| 1) (= |v_ULTIMATE.start_main_~nondetString1~0#1.offset_27| 0) (= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_main_~n~1#1|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= |ULTIMATE.start_main_#t~nondet14#1| 127) (<= (select |#length| |v_ULTIMATE.start_main_~nondetString1~0#1.base_29|) |v_ULTIMATE.start_main_~i~1#1_32|) (<= 2 |v_ULTIMATE.start_main_~nondetString1~0#1.base_29|) (<= |ULTIMATE.start_main_~n~1#1| 2147483647) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet14#1|))))' at error location [2024-11-09 07:10:30,753 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:10:30,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:10:30,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2024-11-09 07:10:30,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922047530] [2024-11-09 07:10:30,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:10:30,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 07:10:30,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:30,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 07:10:30,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2024-11-09 07:10:30,756 INFO L87 Difference]: Start difference. First operand 40 states and 51 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 07:10:31,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:31,020 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2024-11-09 07:10:31,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 07:10:31,021 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 07:10:31,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:31,022 INFO L225 Difference]: With dead ends: 40 [2024-11-09 07:10:31,022 INFO L226 Difference]: Without dead ends: 40 [2024-11-09 07:10:31,022 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2024-11-09 07:10:31,025 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 19 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:31,026 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 144 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:10:31,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-09 07:10:31,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2024-11-09 07:10:31,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 35 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 07:10:31,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-11-09 07:10:31,033 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 9 [2024-11-09 07:10:31,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:31,033 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-11-09 07:10:31,035 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 07:10:31,035 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-11-09 07:10:31,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 07:10:31,036 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:31,036 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:31,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 07:10:31,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-09 07:10:31,238 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:31,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:31,243 INFO L85 PathProgramCache]: Analyzing trace with hash -2057244569, now seen corresponding path program 1 times [2024-11-09 07:10:31,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:31,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558505080] [2024-11-09 07:10:31,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:31,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:31,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:31,330 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 07:10:31,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:31,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558505080] [2024-11-09 07:10:31,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558505080] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:31,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:10:31,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:10:31,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394335995] [2024-11-09 07:10:31,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:31,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:10:31,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:31,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:10:31,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:10:31,332 INFO L87 Difference]: Start difference. First operand 36 states and 45 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 07:10:31,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:31,364 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2024-11-09 07:10:31,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:10:31,364 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 07:10:31,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:31,365 INFO L225 Difference]: With dead ends: 37 [2024-11-09 07:10:31,365 INFO L226 Difference]: Without dead ends: 37 [2024-11-09 07:10:31,365 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 07:10:31,366 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:31,368 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 07:10:31,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-09 07:10:31,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-11-09 07:10:31,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 36 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 07:10:31,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2024-11-09 07:10:31,373 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 11 [2024-11-09 07:10:31,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:31,373 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2024-11-09 07:10:31,373 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 07:10:31,374 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2024-11-09 07:10:31,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 07:10:31,375 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:31,375 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:31,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 07:10:31,375 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:31,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:31,376 INFO L85 PathProgramCache]: Analyzing trace with hash -2057269643, now seen corresponding path program 1 times [2024-11-09 07:10:31,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:31,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502954826] [2024-11-09 07:10:31,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:31,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:31,436 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 07:10:31,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:31,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502954826] [2024-11-09 07:10:31,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502954826] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:31,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:10:31,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:10:31,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616734401] [2024-11-09 07:10:31,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:31,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 07:10:31,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:31,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 07:10:31,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:10:31,438 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:31,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:31,488 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2024-11-09 07:10:31,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 07:10:31,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-09 07:10:31,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:31,489 INFO L225 Difference]: With dead ends: 42 [2024-11-09 07:10:31,489 INFO L226 Difference]: Without dead ends: 42 [2024-11-09 07:10:31,489 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 07:10:31,490 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 30 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:31,490 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 55 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 07:10:31,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-09 07:10:31,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2024-11-09 07:10:31,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 35 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 07:10:31,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-11-09 07:10:31,498 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 11 [2024-11-09 07:10:31,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:31,499 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-11-09 07:10:31,499 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:31,499 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-11-09 07:10:31,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 07:10:31,500 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:31,502 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:31,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 07:10:31,502 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:31,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:31,503 INFO L85 PathProgramCache]: Analyzing trace with hash -2057269642, now seen corresponding path program 1 times [2024-11-09 07:10:31,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:31,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709237685] [2024-11-09 07:10:31,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:31,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:31,591 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 07:10:31,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:31,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709237685] [2024-11-09 07:10:31,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709237685] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:31,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:10:31,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:10:31,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743826914] [2024-11-09 07:10:31,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:31,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:10:31,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:31,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:10:31,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:10:31,596 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:31,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:31,645 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2024-11-09 07:10:31,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 07:10:31,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-09 07:10:31,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:31,646 INFO L225 Difference]: With dead ends: 47 [2024-11-09 07:10:31,646 INFO L226 Difference]: Without dead ends: 47 [2024-11-09 07:10:31,646 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 07:10:31,647 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 29 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:31,647 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 77 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 07:10:31,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-09 07:10:31,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2024-11-09 07:10:31,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.606060606060606) internal successors, (53), 40 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 07:10:31,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2024-11-09 07:10:31,650 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 11 [2024-11-09 07:10:31,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:31,651 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2024-11-09 07:10:31,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:31,651 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2024-11-09 07:10:31,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 07:10:31,651 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:31,652 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:31,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 07:10:31,652 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:31,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:31,652 INFO L85 PathProgramCache]: Analyzing trace with hash -2058039179, now seen corresponding path program 1 times [2024-11-09 07:10:31,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:31,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600739858] [2024-11-09 07:10:31,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:31,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:31,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:31,713 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 07:10:31,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:31,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600739858] [2024-11-09 07:10:31,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600739858] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:31,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:10:31,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:10:31,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248266953] [2024-11-09 07:10:31,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:31,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 07:10:31,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:31,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 07:10:31,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:10:31,715 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:31,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:31,771 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2024-11-09 07:10:31,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 07:10:31,772 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-09 07:10:31,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:31,772 INFO L225 Difference]: With dead ends: 40 [2024-11-09 07:10:31,772 INFO L226 Difference]: Without dead ends: 40 [2024-11-09 07:10:31,772 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:10:31,773 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:31,773 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 57 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 07:10:31,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-09 07:10:31,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-09 07:10:31,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 39 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 07:10:31,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2024-11-09 07:10:31,776 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 11 [2024-11-09 07:10:31,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:31,777 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2024-11-09 07:10:31,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:31,777 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2024-11-09 07:10:31,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 07:10:31,778 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:31,778 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:31,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 07:10:31,778 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:31,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:31,779 INFO L85 PathProgramCache]: Analyzing trace with hash -2058039178, now seen corresponding path program 1 times [2024-11-09 07:10:31,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:31,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279533178] [2024-11-09 07:10:31,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:31,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:31,930 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 07:10:31,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:31,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279533178] [2024-11-09 07:10:31,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279533178] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:31,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:10:31,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:10:31,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675398977] [2024-11-09 07:10:31,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:31,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:10:31,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:31,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:10:31,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:10:31,932 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:32,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:32,014 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2024-11-09 07:10:32,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 07:10:32,015 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-09 07:10:32,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:32,016 INFO L225 Difference]: With dead ends: 43 [2024-11-09 07:10:32,016 INFO L226 Difference]: Without dead ends: 43 [2024-11-09 07:10:32,016 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:10:32,017 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:32,017 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 77 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:10:32,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-09 07:10:32,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2024-11-09 07:10:32,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 40 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 07:10:32,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2024-11-09 07:10:32,020 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 11 [2024-11-09 07:10:32,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:32,021 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2024-11-09 07:10:32,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:32,021 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2024-11-09 07:10:32,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-09 07:10:32,021 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:32,022 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:32,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-09 07:10:32,022 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:32,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:32,023 INFO L85 PathProgramCache]: Analyzing trace with hash 649155631, now seen corresponding path program 1 times [2024-11-09 07:10:32,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:32,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450582235] [2024-11-09 07:10:32,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:32,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:32,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:32,109 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 07:10:32,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:32,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450582235] [2024-11-09 07:10:32,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450582235] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:32,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:10:32,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:10:32,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275234752] [2024-11-09 07:10:32,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:32,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 07:10:32,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:32,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 07:10:32,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:10:32,112 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:32,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:32,164 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2024-11-09 07:10:32,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 07:10:32,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-09 07:10:32,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:32,165 INFO L225 Difference]: With dead ends: 40 [2024-11-09 07:10:32,165 INFO L226 Difference]: Without dead ends: 40 [2024-11-09 07:10:32,166 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:10:32,166 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 18 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:32,166 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 57 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 07:10:32,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-09 07:10:32,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-09 07:10:32,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 39 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 07:10:32,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2024-11-09 07:10:32,171 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 12 [2024-11-09 07:10:32,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:32,172 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2024-11-09 07:10:32,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:32,172 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2024-11-09 07:10:32,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-09 07:10:32,172 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:32,172 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:32,173 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-09 07:10:32,173 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:32,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:32,173 INFO L85 PathProgramCache]: Analyzing trace with hash 649155632, now seen corresponding path program 1 times [2024-11-09 07:10:32,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:32,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412313047] [2024-11-09 07:10:32,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:32,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:32,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:32,370 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 07:10:32,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:32,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412313047] [2024-11-09 07:10:32,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412313047] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:32,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:10:32,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:10:32,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223031320] [2024-11-09 07:10:32,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:32,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:10:32,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:32,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:10:32,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:10:32,372 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:32,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:32,455 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2024-11-09 07:10:32,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 07:10:32,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-09 07:10:32,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:32,456 INFO L225 Difference]: With dead ends: 43 [2024-11-09 07:10:32,456 INFO L226 Difference]: Without dead ends: 43 [2024-11-09 07:10:32,457 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:10:32,457 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 13 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:32,457 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 73 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:10:32,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-09 07:10:32,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2024-11-09 07:10:32,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 36 states have (on average 1.5) internal successors, (54), 41 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 07:10:32,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2024-11-09 07:10:32,459 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 12 [2024-11-09 07:10:32,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:32,462 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2024-11-09 07:10:32,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:32,462 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2024-11-09 07:10:32,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-09 07:10:32,463 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:32,463 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:32,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-09 07:10:32,463 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:32,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:32,464 INFO L85 PathProgramCache]: Analyzing trace with hash 625294933, now seen corresponding path program 1 times [2024-11-09 07:10:32,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:32,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246855450] [2024-11-09 07:10:32,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:32,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:32,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:32,533 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 07:10:32,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:32,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246855450] [2024-11-09 07:10:32,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246855450] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:32,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:10:32,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 07:10:32,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774508967] [2024-11-09 07:10:32,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:32,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:10:32,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:32,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:10:32,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:10:32,535 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:32,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:32,587 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2024-11-09 07:10:32,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 07:10:32,587 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-09 07:10:32,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:32,588 INFO L225 Difference]: With dead ends: 48 [2024-11-09 07:10:32,588 INFO L226 Difference]: Without dead ends: 48 [2024-11-09 07:10:32,588 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:10:32,589 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 29 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:32,589 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 74 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 07:10:32,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-09 07:10:32,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2024-11-09 07:10:32,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 40 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 07:10:32,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2024-11-09 07:10:32,592 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 12 [2024-11-09 07:10:32,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:32,592 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2024-11-09 07:10:32,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:32,592 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2024-11-09 07:10:32,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-09 07:10:32,593 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:32,593 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:32,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-09 07:10:32,594 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:32,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:32,594 INFO L85 PathProgramCache]: Analyzing trace with hash 625294934, now seen corresponding path program 1 times [2024-11-09 07:10:32,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:32,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156180469] [2024-11-09 07:10:32,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:32,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:32,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:32,706 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 07:10:32,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:32,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156180469] [2024-11-09 07:10:32,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156180469] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:32,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:10:32,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 07:10:32,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785918259] [2024-11-09 07:10:32,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:32,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 07:10:32,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:32,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 07:10:32,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:10:32,708 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:32,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:32,774 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2024-11-09 07:10:32,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 07:10:32,775 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-09 07:10:32,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:32,775 INFO L225 Difference]: With dead ends: 49 [2024-11-09 07:10:32,775 INFO L226 Difference]: Without dead ends: 49 [2024-11-09 07:10:32,776 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:10:32,776 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 22 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:32,777 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 99 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:10:32,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-09 07:10:32,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2024-11-09 07:10:32,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 41 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 07:10:32,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2024-11-09 07:10:32,779 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 12 [2024-11-09 07:10:32,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:32,779 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2024-11-09 07:10:32,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:32,780 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2024-11-09 07:10:32,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 07:10:32,780 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:32,780 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:32,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-09 07:10:32,780 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:32,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:32,781 INFO L85 PathProgramCache]: Analyzing trace with hash -2090709155, now seen corresponding path program 1 times [2024-11-09 07:10:32,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:32,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207686372] [2024-11-09 07:10:32,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:32,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:32,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:32,914 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 07:10:32,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:32,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207686372] [2024-11-09 07:10:32,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207686372] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:32,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:10:32,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 07:10:32,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685178928] [2024-11-09 07:10:32,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:32,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 07:10:32,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:32,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 07:10:32,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:10:32,917 INFO L87 Difference]: Start difference. First operand 42 states and 54 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 07:10:32,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:32,944 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2024-11-09 07:10:32,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 07:10:32,944 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 07:10:32,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:32,945 INFO L225 Difference]: With dead ends: 41 [2024-11-09 07:10:32,945 INFO L226 Difference]: Without dead ends: 39 [2024-11-09 07:10:32,945 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 07:10:32,946 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 25 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 54 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 07:10:32,946 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 54 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 07:10:32,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-09 07:10:32,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2024-11-09 07:10:32,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.411764705882353) internal successors, (48), 37 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 07:10:32,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2024-11-09 07:10:32,948 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 13 [2024-11-09 07:10:32,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:32,948 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2024-11-09 07:10:32,949 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 07:10:32,949 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2024-11-09 07:10:32,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 07:10:32,949 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:32,949 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:32,950 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-09 07:10:32,950 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:32,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:32,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1242253567, now seen corresponding path program 1 times [2024-11-09 07:10:32,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:32,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63802921] [2024-11-09 07:10:32,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:32,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:33,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:10:33,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:33,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63802921] [2024-11-09 07:10:33,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63802921] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:33,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:10:33,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 07:10:33,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111069164] [2024-11-09 07:10:33,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:33,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 07:10:33,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:33,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 07:10:33,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:10:33,084 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:33,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:33,136 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2024-11-09 07:10:33,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 07:10:33,136 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-09 07:10:33,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:33,137 INFO L225 Difference]: With dead ends: 46 [2024-11-09 07:10:33,137 INFO L226 Difference]: Without dead ends: 46 [2024-11-09 07:10:33,137 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:10:33,137 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:33,138 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 78 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 07:10:33,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-09 07:10:33,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2024-11-09 07:10:33,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 42 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 07:10:33,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2024-11-09 07:10:33,139 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 15 [2024-11-09 07:10:33,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:33,144 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2024-11-09 07:10:33,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:33,144 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2024-11-09 07:10:33,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-09 07:10:33,145 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:33,145 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:33,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-09 07:10:33,149 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:33,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:33,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1765427874, now seen corresponding path program 1 times [2024-11-09 07:10:33,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:33,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695719268] [2024-11-09 07:10:33,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:33,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:33,306 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 07:10:33,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:33,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695719268] [2024-11-09 07:10:33,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695719268] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:33,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:10:33,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-09 07:10:33,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003162000] [2024-11-09 07:10:33,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:33,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 07:10:33,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:33,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 07:10:33,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-09 07:10:33,310 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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 07:10:33,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:33,373 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2024-11-09 07:10:33,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 07:10:33,374 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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 07:10:33,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:33,374 INFO L225 Difference]: With dead ends: 47 [2024-11-09 07:10:33,374 INFO L226 Difference]: Without dead ends: 47 [2024-11-09 07:10:33,374 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-09 07:10:33,375 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 13 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:33,376 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 133 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:10:33,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-09 07:10:33,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2024-11-09 07:10:33,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 44 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:33,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2024-11-09 07:10:33,378 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 16 [2024-11-09 07:10:33,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:33,378 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2024-11-09 07:10:33,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 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 07:10:33,379 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2024-11-09 07:10:33,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-09 07:10:33,379 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:33,380 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:33,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-09 07:10:33,380 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:33,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:33,380 INFO L85 PathProgramCache]: Analyzing trace with hash 94481143, now seen corresponding path program 1 times [2024-11-09 07:10:33,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:33,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690691260] [2024-11-09 07:10:33,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:33,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:33,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:33,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:10:33,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:33,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690691260] [2024-11-09 07:10:33,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690691260] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:33,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:10:33,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 07:10:33,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097278719] [2024-11-09 07:10:33,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:33,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 07:10:33,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:33,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 07:10:33,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:10:33,541 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 07:10:33,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:33,586 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2024-11-09 07:10:33,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 07:10:33,587 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 17 [2024-11-09 07:10:33,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:33,587 INFO L225 Difference]: With dead ends: 49 [2024-11-09 07:10:33,588 INFO L226 Difference]: Without dead ends: 49 [2024-11-09 07:10:33,588 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:10:33,589 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:33,589 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 84 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 07:10:33,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-09 07:10:33,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2024-11-09 07:10:33,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 46 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:33,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2024-11-09 07:10:33,591 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 17 [2024-11-09 07:10:33,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:33,592 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2024-11-09 07:10:33,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 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 07:10:33,592 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2024-11-09 07:10:33,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-09 07:10:33,593 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:33,593 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:33,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-09 07:10:33,593 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:33,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:33,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1262666031, now seen corresponding path program 1 times [2024-11-09 07:10:33,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:33,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157665895] [2024-11-09 07:10:33,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:33,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:33,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:10:33,722 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:33,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157665895] [2024-11-09 07:10:33,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157665895] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:10:33,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016265384] [2024-11-09 07:10:33,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:33,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:33,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:10:33,725 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:10:33,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 07:10:33,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:33,810 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 07:10:33,811 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:10:33,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-09 07:10:34,001 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:10:34,008 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:10:34,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2024-11-09 07:10:34,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:10:34,025 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:10:34,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016265384] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:34,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:10:34,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2024-11-09 07:10:34,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770018590] [2024-11-09 07:10:34,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:34,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 07:10:34,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:34,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 07:10:34,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-11-09 07:10:34,027 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:34,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:34,126 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2024-11-09 07:10:34,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 07:10:34,127 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2024-11-09 07:10:34,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:34,127 INFO L225 Difference]: With dead ends: 73 [2024-11-09 07:10:34,128 INFO L226 Difference]: Without dead ends: 59 [2024-11-09 07:10:34,128 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-11-09 07:10:34,128 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:34,129 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 122 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:10:34,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-09 07:10:34,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-11-09 07:10:34,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:34,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2024-11-09 07:10:34,131 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 18 [2024-11-09 07:10:34,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:34,132 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2024-11-09 07:10:34,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:34,132 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2024-11-09 07:10:34,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 07:10:34,133 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:34,133 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 07:10:34,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 07:10:34,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-09 07:10:34,334 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:34,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:34,334 INFO L85 PathProgramCache]: Analyzing trace with hash 2108524084, now seen corresponding path program 1 times [2024-11-09 07:10:34,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:34,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275875448] [2024-11-09 07:10:34,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:34,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:34,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:10:34,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:34,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275875448] [2024-11-09 07:10:34,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275875448] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:10:34,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104420649] [2024-11-09 07:10:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:34,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:34,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:10:34,594 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:10:34,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 07:10:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:34,681 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 07:10:34,682 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:10:34,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:10:34,724 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:10:34,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104420649] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:34,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:10:34,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 12 [2024-11-09 07:10:34,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744400916] [2024-11-09 07:10:34,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:34,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 07:10:34,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:34,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 07:10:34,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-09 07:10:34,728 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:34,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:34,755 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2024-11-09 07:10:34,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 07:10:34,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-09 07:10:34,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:34,756 INFO L225 Difference]: With dead ends: 59 [2024-11-09 07:10:34,756 INFO L226 Difference]: Without dead ends: 58 [2024-11-09 07:10:34,756 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-09 07:10:34,757 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:34,757 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 69 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 07:10:34,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-09 07:10:34,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-11-09 07:10:34,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 57 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:34,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2024-11-09 07:10:34,760 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 19 [2024-11-09 07:10:34,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:34,760 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2024-11-09 07:10:34,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:34,761 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2024-11-09 07:10:34,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 07:10:34,761 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:34,761 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:34,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 07:10:34,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-09 07:10:34,962 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:34,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:34,962 INFO L85 PathProgramCache]: Analyzing trace with hash 2108558905, now seen corresponding path program 1 times [2024-11-09 07:10:34,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:34,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533008197] [2024-11-09 07:10:34,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:34,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:34,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:10:35,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:35,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533008197] [2024-11-09 07:10:35,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533008197] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:10:35,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732597259] [2024-11-09 07:10:35,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:35,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:35,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:10:35,126 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:10:35,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 07:10:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:35,222 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 07:10:35,224 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:10:35,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-09 07:10:35,407 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 07:10:35,410 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:10:35,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2024-11-09 07:10:35,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:10:35,431 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:10:35,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732597259] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:35,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:10:35,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 14 [2024-11-09 07:10:35,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536074007] [2024-11-09 07:10:35,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:35,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 07:10:35,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:35,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 07:10:35,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-11-09 07:10:35,433 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:35,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:35,524 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2024-11-09 07:10:35,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 07:10:35,525 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-09 07:10:35,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:35,525 INFO L225 Difference]: With dead ends: 62 [2024-11-09 07:10:35,526 INFO L226 Difference]: Without dead ends: 48 [2024-11-09 07:10:35,526 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-11-09 07:10:35,526 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:35,527 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 144 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:10:35,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-09 07:10:35,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2024-11-09 07:10:35,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 45 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 07:10:35,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2024-11-09 07:10:35,529 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 19 [2024-11-09 07:10:35,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:35,529 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2024-11-09 07:10:35,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:35,529 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2024-11-09 07:10:35,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-09 07:10:35,530 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:35,530 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:35,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 07:10:35,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-09 07:10:35,731 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:35,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:35,731 INFO L85 PathProgramCache]: Analyzing trace with hash 622811419, now seen corresponding path program 1 times [2024-11-09 07:10:35,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:35,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608174420] [2024-11-09 07:10:35,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:35,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:35,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:36,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:10:36,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:36,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608174420] [2024-11-09 07:10:36,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608174420] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:10:36,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309482770] [2024-11-09 07:10:36,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:36,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:36,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:10:36,033 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:10:36,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 07:10:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:36,123 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 07:10:36,125 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:10:36,136 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 07:10:36,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:10:36,231 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:10:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:10:36,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309482770] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:10:36,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1979153122] [2024-11-09 07:10:36,454 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 07:10:36,455 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:10:36,455 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:10:36,455 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:10:36,455 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:10:37,409 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:10:38,390 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2743#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| 0))' at error location [2024-11-09 07:10:38,390 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:10:38,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:10:38,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2024-11-09 07:10:38,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876709438] [2024-11-09 07:10:38,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:10:38,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 07:10:38,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:38,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 07:10:38,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 07:10:38,392 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:38,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:38,601 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2024-11-09 07:10:38,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 07:10:38,602 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-09 07:10:38,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:38,602 INFO L225 Difference]: With dead ends: 58 [2024-11-09 07:10:38,602 INFO L226 Difference]: Without dead ends: 58 [2024-11-09 07:10:38,603 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=143, Invalid=1047, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 07:10:38,603 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 40 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:38,603 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 193 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:10:38,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-09 07:10:38,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2024-11-09 07:10:38,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 54 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:38,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2024-11-09 07:10:38,606 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 21 [2024-11-09 07:10:38,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:38,606 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2024-11-09 07:10:38,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:38,607 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2024-11-09 07:10:38,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 07:10:38,607 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:38,607 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:38,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 07:10:38,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:38,811 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:38,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:38,812 INFO L85 PathProgramCache]: Analyzing trace with hash -547064883, now seen corresponding path program 1 times [2024-11-09 07:10:38,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:38,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901907963] [2024-11-09 07:10:38,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:38,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:38,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:10:39,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:39,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901907963] [2024-11-09 07:10:39,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901907963] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:10:39,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202761062] [2024-11-09 07:10:39,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:39,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:39,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:10:39,230 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:10:39,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 07:10:39,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:39,320 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 07:10:39,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:10:39,328 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 07:10:39,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:10:39,426 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:10:39,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:10:39,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202761062] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:10:39,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1537122222] [2024-11-09 07:10:39,654 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 07:10:39,655 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:10:39,655 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:10:39,655 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:10:39,655 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:10:41,060 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:10:42,816 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3019#(and (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_23| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_23| Int)) (and (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_21| Int)) (and (not (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_21| 4294967296) 0)) (= |ULTIMATE.start_cstrlcpy_~n~0#1| |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_21|) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_20| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_21| Int) (|v_#memory_int_71| (Array Int (Array Int Int)))) (and (<= 1 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_21|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_20|) 0)) (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 2 |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_23|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (= 1 (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_21|)) (<= 2 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_21|) (<= (+ |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_20| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_21|)) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_23|) (<= 2 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_20|) (= |#memory_int| (store |v_#memory_int_71| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_21| (store (select |v_#memory_int_71| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_21|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_20| (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_21|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_20|)))))))) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_23|) |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_23|) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_23|) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_23| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|))) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0))' at error location [2024-11-09 07:10:42,816 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:10:42,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:10:42,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2024-11-09 07:10:42,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889781223] [2024-11-09 07:10:42,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:10:42,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 07:10:42,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:42,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 07:10:42,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1004, Unknown=2, NotChecked=0, Total=1122 [2024-11-09 07:10:42,819 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 19 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 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 07:10:43,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:43,061 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2024-11-09 07:10:43,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 07:10:43,061 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 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 22 [2024-11-09 07:10:43,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:43,062 INFO L225 Difference]: With dead ends: 59 [2024-11-09 07:10:43,062 INFO L226 Difference]: Without dead ends: 59 [2024-11-09 07:10:43,063 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=132, Invalid=1126, Unknown=2, NotChecked=0, Total=1260 [2024-11-09 07:10:43,063 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 41 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:43,063 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 205 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:10:43,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-09 07:10:43,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2024-11-09 07:10:43,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 55 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:43,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2024-11-09 07:10:43,066 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 22 [2024-11-09 07:10:43,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:43,066 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2024-11-09 07:10:43,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 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 07:10:43,067 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2024-11-09 07:10:43,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-09 07:10:43,067 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:43,067 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:43,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 07:10:43,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:43,271 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:43,272 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:43,272 INFO L85 PathProgramCache]: Analyzing trace with hash 220857823, now seen corresponding path program 1 times [2024-11-09 07:10:43,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:43,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750000623] [2024-11-09 07:10:43,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:43,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:43,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:43,556 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 07:10:43,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:43,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750000623] [2024-11-09 07:10:43,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750000623] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:10:43,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243900574] [2024-11-09 07:10:43,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:43,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:43,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:10:43,559 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:10:43,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 07:10:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:43,653 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 07:10:43,655 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:10:43,777 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 07:10:43,777 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:10:43,950 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 07:10:43,993 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 07:10:43,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243900574] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:10:43,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1323682623] [2024-11-09 07:10:44,001 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 07:10:44,001 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:10:44,002 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:10:44,002 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:10:44,002 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:10:45,200 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:10:46,853 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3306#(and (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_30| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_30| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_30|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_30|) (<= 1 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_30|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 2 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_30|) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.base|))))' at error location [2024-11-09 07:10:46,853 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:10:46,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:10:46,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-11-09 07:10:46,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101719761] [2024-11-09 07:10:46,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:10:46,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 07:10:46,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:46,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 07:10:46,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1130, Unknown=2, NotChecked=0, Total=1260 [2024-11-09 07:10:46,855 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 21 states, 20 states have (on average 2.65) internal successors, (53), 21 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 07:10:47,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:47,132 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2024-11-09 07:10:47,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 07:10:47,133 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 21 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) Word has length 23 [2024-11-09 07:10:47,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:47,133 INFO L225 Difference]: With dead ends: 75 [2024-11-09 07:10:47,134 INFO L226 Difference]: Without dead ends: 75 [2024-11-09 07:10:47,134 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=153, Invalid=1327, Unknown=2, NotChecked=0, Total=1482 [2024-11-09 07:10:47,135 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 63 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:47,135 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 336 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:10:47,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-09 07:10:47,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 57. [2024-11-09 07:10:47,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:47,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2024-11-09 07:10:47,137 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 23 [2024-11-09 07:10:47,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:47,138 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2024-11-09 07:10:47,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 21 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 07:10:47,138 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2024-11-09 07:10:47,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-09 07:10:47,139 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:47,139 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:47,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 07:10:47,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-09 07:10:47,339 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:47,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:47,340 INFO L85 PathProgramCache]: Analyzing trace with hash -83687882, now seen corresponding path program 2 times [2024-11-09 07:10:47,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:47,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437256863] [2024-11-09 07:10:47,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:47,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:10:47,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:47,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437256863] [2024-11-09 07:10:47,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437256863] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:10:47,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328211983] [2024-11-09 07:10:47,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:10:47,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:47,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:10:47,483 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:10:47,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 07:10:47,572 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-09 07:10:47,572 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:10:47,573 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 07:10:47,575 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:10:47,591 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 07:10:47,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:10:47,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2024-11-09 07:10:47,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 07:10:47,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 07:10:47,719 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:10:47,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328211983] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:10:47,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:10:47,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2024-11-09 07:10:47,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694834717] [2024-11-09 07:10:47,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:10:47,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:10:47,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:47,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:10:47,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-09 07:10:47,721 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:47,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:47,777 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2024-11-09 07:10:47,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 07:10:47,777 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-09 07:10:47,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:47,778 INFO L225 Difference]: With dead ends: 57 [2024-11-09 07:10:47,778 INFO L226 Difference]: Without dead ends: 57 [2024-11-09 07:10:47,778 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-09 07:10:47,779 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:47,779 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 59 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 07:10:47,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-09 07:10:47,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2024-11-09 07:10:47,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 54 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:47,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2024-11-09 07:10:47,781 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 24 [2024-11-09 07:10:47,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:47,796 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2024-11-09 07:10:47,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:47,796 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2024-11-09 07:10:47,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-09 07:10:47,797 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:47,797 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:47,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 07:10:47,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:47,998 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:47,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:47,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1341470881, now seen corresponding path program 1 times [2024-11-09 07:10:47,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:47,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318145314] [2024-11-09 07:10:47,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:48,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:48,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:10:48,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:48,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318145314] [2024-11-09 07:10:48,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318145314] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:10:48,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216963595] [2024-11-09 07:10:48,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:48,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:48,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:10:48,456 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:10:48,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 07:10:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:48,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-09 07:10:48,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:10:48,571 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 07:10:48,671 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 07:10:48,712 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 07:10:48,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:10:48,768 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:10:48,835 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:10:48,835 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 07:10:48,843 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:10:48,843 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 07:10:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:10:48,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216963595] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:10:48,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1086132676] [2024-11-09 07:10:48,940 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 07:10:48,940 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:10:48,940 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:10:48,941 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:10:48,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:10:49,546 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:10:50,639 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3813#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.base|))' at error location [2024-11-09 07:10:50,639 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:10:50,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:10:50,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2024-11-09 07:10:50,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222694353] [2024-11-09 07:10:50,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:10:50,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 07:10:50,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:50,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 07:10:50,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1271, Unknown=9, NotChecked=0, Total=1406 [2024-11-09 07:10:50,641 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:50,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:50,912 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2024-11-09 07:10:50,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 07:10:50,913 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 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 07:10:50,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:50,914 INFO L225 Difference]: With dead ends: 88 [2024-11-09 07:10:50,914 INFO L226 Difference]: Without dead ends: 73 [2024-11-09 07:10:50,915 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=147, Invalid=1483, Unknown=10, NotChecked=0, Total=1640 [2024-11-09 07:10:50,916 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:50,920 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 199 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:10:50,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-11-09 07:10:50,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2024-11-09 07:10:50,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 65 states have (on average 1.2) internal successors, (78), 68 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:50,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2024-11-09 07:10:50,922 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 24 [2024-11-09 07:10:50,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:50,922 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2024-11-09 07:10:50,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:50,923 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2024-11-09 07:10:50,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-09 07:10:50,923 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:50,923 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:50,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 07:10:51,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-09 07:10:51,124 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:51,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:51,125 INFO L85 PathProgramCache]: Analyzing trace with hash -435998835, now seen corresponding path program 2 times [2024-11-09 07:10:51,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:51,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040316592] [2024-11-09 07:10:51,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:51,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:51,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:51,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:10:51,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:51,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040316592] [2024-11-09 07:10:51,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040316592] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:10:51,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847074484] [2024-11-09 07:10:51,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:10:51,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:51,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:10:51,508 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:10:51,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 07:10:51,619 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 07:10:51,619 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:10:51,621 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-09 07:10:51,624 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:10:51,632 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 07:10:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:10:51,779 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:10:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:10:52,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847074484] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:10:52,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [677930414] [2024-11-09 07:10:52,117 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 07:10:52,117 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:10:52,118 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:10:52,118 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:10:52,118 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:10:52,810 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:10:53,857 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4168#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.base|))' at error location [2024-11-09 07:10:53,857 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:10:53,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:10:53,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2024-11-09 07:10:53,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111428619] [2024-11-09 07:10:53,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:10:53,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 07:10:53,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:53,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 07:10:53,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 07:10:53,860 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 21 states, 20 states have (on average 3.75) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:54,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:54,200 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2024-11-09 07:10:54,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 07:10:54,201 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.75) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-09 07:10:54,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:54,202 INFO L225 Difference]: With dead ends: 91 [2024-11-09 07:10:54,202 INFO L226 Difference]: Without dead ends: 91 [2024-11-09 07:10:54,203 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=154, Invalid=1328, Unknown=0, NotChecked=0, Total=1482 [2024-11-09 07:10:54,203 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 54 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:54,204 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 278 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 07:10:54,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-11-09 07:10:54,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2024-11-09 07:10:54,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 87 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:54,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2024-11-09 07:10:54,206 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 27 [2024-11-09 07:10:54,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:54,207 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2024-11-09 07:10:54,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.75) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:54,207 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2024-11-09 07:10:54,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-09 07:10:54,208 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:54,208 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:54,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 07:10:54,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:54,412 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:54,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:54,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1158763088, now seen corresponding path program 2 times [2024-11-09 07:10:54,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:54,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116135344] [2024-11-09 07:10:54,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:54,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:10:54,623 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:10:54,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:54,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116135344] [2024-11-09 07:10:54,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116135344] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:10:54,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197333111] [2024-11-09 07:10:54,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:10:54,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:54,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:10:54,628 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:10:54,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 07:10:54,767 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 07:10:54,768 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:10:54,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-09 07:10:54,772 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:10:54,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 07:10:54,926 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 07:10:54,987 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 07:10:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:10:55,050 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:10:55,066 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_438 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_438) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) is different from false [2024-11-09 07:10:55,076 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_438 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_438) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2024-11-09 07:10:55,089 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:10:55,090 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 07:10:55,098 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:10:55,098 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 07:10:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2024-11-09 07:10:55,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197333111] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:10:55,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1055840974] [2024-11-09 07:10:55,216 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 07:10:55,216 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:10:55,216 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:10:55,216 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:10:55,217 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:10:56,476 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:10:58,502 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4546#(and (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_45| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_45| Int)) (and (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_45| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_45|) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_45|) |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_45|) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_44| Int)) (and (= |ULTIMATE.start_cstrlcpy_~n~0#1| |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_44|) (not (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_44| 4294967296) 0)) (exists ((|v_#memory_int_136| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_42| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_43| Int)) (and (<= 1 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_45|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 2 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_43|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= (+ |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_42| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_43|)) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_45|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_43|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_42|) 0)) (= |#memory_int| (store |v_#memory_int_136| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_43| (store (select |v_#memory_int_136| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_43|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_42| (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_43|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_42|)))) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_43|) 1) (<= 2 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_42|))))) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|))) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0))' at error location [2024-11-09 07:10:58,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:10:58,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:10:58,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2024-11-09 07:10:58,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927363476] [2024-11-09 07:10:58,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:10:58,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 07:10:58,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:58,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 07:10:58,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1097, Unknown=4, NotChecked=134, Total=1332 [2024-11-09 07:10:58,505 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 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 07:10:59,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:59,265 INFO L93 Difference]: Finished difference Result 125 states and 138 transitions. [2024-11-09 07:10:59,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-09 07:10:59,266 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 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 27 [2024-11-09 07:10:59,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:59,266 INFO L225 Difference]: With dead ends: 125 [2024-11-09 07:10:59,266 INFO L226 Difference]: Without dead ends: 121 [2024-11-09 07:10:59,267 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=147, Invalid=1749, Unknown=4, NotChecked=170, Total=2070 [2024-11-09 07:10:59,268 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:59,268 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 302 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 435 Invalid, 0 Unknown, 153 Unchecked, 0.4s Time] [2024-11-09 07:10:59,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-11-09 07:10:59,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 100. [2024-11-09 07:10:59,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 96 states have (on average 1.1666666666666667) internal successors, (112), 99 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 07:10:59,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 112 transitions. [2024-11-09 07:10:59,276 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 112 transitions. Word has length 27 [2024-11-09 07:10:59,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:59,276 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 112 transitions. [2024-11-09 07:10:59,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 22 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 07:10:59,276 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 112 transitions. [2024-11-09 07:10:59,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-09 07:10:59,277 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:59,277 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:10:59,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 07:10:59,477 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:59,478 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:10:59,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:59,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1283840877, now seen corresponding path program 1 times [2024-11-09 07:10:59,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:59,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017302824] [2024-11-09 07:10:59,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:59,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:11:00,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:11:00,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:11:00,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017302824] [2024-11-09 07:11:00,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017302824] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:11:00,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21011530] [2024-11-09 07:11:00,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:11:00,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:11:00,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:11:00,117 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:11:00,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 07:11:00,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:11:00,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-09 07:11:00,253 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:11:00,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-09 07:11:00,409 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 07:11:00,514 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 07:11:00,566 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 07:11:00,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:11:00,612 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:11:00,620 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_474 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_474) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) is different from false [2024-11-09 07:11:00,688 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_474 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_474) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2024-11-09 07:11:00,702 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:11:00,702 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 07:11:00,710 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:11:00,710 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 07:11:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2024-11-09 07:11:00,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21011530] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:11:00,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [409597568] [2024-11-09 07:11:00,881 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 07:11:00,883 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:11:00,883 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:11:00,884 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:11:00,884 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:11:06,807 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:11:20,080 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5001#(and (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_56| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_56| Int)) (and (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_56|) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_56|) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_56|) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_56| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (= |ULTIMATE.start_cstrlcpy_~s~0#1.offset| (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_56| 1)))) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0))' at error location [2024-11-09 07:11:20,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:11:20,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:11:20,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 26 [2024-11-09 07:11:20,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952999139] [2024-11-09 07:11:20,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:11:20,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-09 07:11:20,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:11:20,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-09 07:11:20,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1896, Unknown=23, NotChecked=178, Total=2256 [2024-11-09 07:11:20,083 INFO L87 Difference]: Start difference. First operand 100 states and 112 transitions. Second operand has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 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 07:11:20,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:11:20,706 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2024-11-09 07:11:20,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 07:11:20,706 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 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 29 [2024-11-09 07:11:20,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:11:20,707 INFO L225 Difference]: With dead ends: 105 [2024-11-09 07:11:20,707 INFO L226 Difference]: Without dead ends: 83 [2024-11-09 07:11:20,708 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=200, Invalid=2335, Unknown=23, NotChecked=198, Total=2756 [2024-11-09 07:11:20,708 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 5 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:11:20,709 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 446 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 337 Invalid, 0 Unknown, 73 Unchecked, 0.3s Time] [2024-11-09 07:11:20,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-09 07:11:20,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2024-11-09 07:11:20,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 80 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:11:20,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2024-11-09 07:11:20,712 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 29 [2024-11-09 07:11:20,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:11:20,712 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2024-11-09 07:11:20,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 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 07:11:20,712 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2024-11-09 07:11:20,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-09 07:11:20,712 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:11:20,713 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:11:20,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 07:11:20,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:11:20,913 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:11:20,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:11:20,914 INFO L85 PathProgramCache]: Analyzing trace with hash -860142972, now seen corresponding path program 3 times [2024-11-09 07:11:20,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:11:20,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33477268] [2024-11-09 07:11:20,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:11:20,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:11:20,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:11:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:11:21,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:11:21,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33477268] [2024-11-09 07:11:21,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33477268] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:11:21,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588919088] [2024-11-09 07:11:21,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:11:21,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:11:21,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:11:21,824 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:11:21,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 07:11:21,971 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:11:21,971 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:11:21,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-09 07:11:21,976 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:11:22,386 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 07:11:22,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:11:22,529 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 21 treesize of output 20 [2024-11-09 07:11:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:11:22,897 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:11:23,083 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 07:11:23,087 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 07:11:23,435 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:11:23,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588919088] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:11:23,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1920521179] [2024-11-09 07:11:23,437 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 07:11:23,437 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:11:23,437 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:11:23,438 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:11:23,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:11:23,953 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:11:26,205 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5425#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.base|))' at error location [2024-11-09 07:11:26,205 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:11:26,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:11:26,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 11] total 30 [2024-11-09 07:11:26,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467991022] [2024-11-09 07:11:26,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:11:26,206 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 07:11:26,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:11:26,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 07:11:26,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1925, Unknown=0, NotChecked=0, Total=2070 [2024-11-09 07:11:26,207 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 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 07:11:27,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:11:27,501 INFO L93 Difference]: Finished difference Result 128 states and 143 transitions. [2024-11-09 07:11:27,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 07:11:27,502 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 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) Word has length 30 [2024-11-09 07:11:27,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:11:27,503 INFO L225 Difference]: With dead ends: 128 [2024-11-09 07:11:27,503 INFO L226 Difference]: Without dead ends: 110 [2024-11-09 07:11:27,504 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=204, Invalid=2766, Unknown=0, NotChecked=0, Total=2970 [2024-11-09 07:11:27,504 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 32 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 07:11:27,505 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 303 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 07:11:27,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-09 07:11:27,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 98. [2024-11-09 07:11:27,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 94 states have (on average 1.1808510638297873) internal successors, (111), 97 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:11:27,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 111 transitions. [2024-11-09 07:11:27,508 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 111 transitions. Word has length 30 [2024-11-09 07:11:27,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:11:27,509 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 111 transitions. [2024-11-09 07:11:27,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 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 07:11:27,509 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 111 transitions. [2024-11-09 07:11:27,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 07:11:27,510 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:11:27,510 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:11:27,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-09 07:11:27,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:11:27,716 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:11:27,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:11:27,717 INFO L85 PathProgramCache]: Analyzing trace with hash -432580496, now seen corresponding path program 4 times [2024-11-09 07:11:27,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:11:27,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589502087] [2024-11-09 07:11:27,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:11:27,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:11:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:11:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:11:28,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:11:28,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589502087] [2024-11-09 07:11:28,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589502087] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:11:28,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118691222] [2024-11-09 07:11:28,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 07:11:28,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:11:28,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:11:28,234 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:11:28,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 07:11:28,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:11:28,347 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-09 07:11:28,349 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:11:28,358 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 07:11:28,710 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:11:28,710 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:11:29,383 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:11:29,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118691222] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:11:29,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1249564822] [2024-11-09 07:11:29,386 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 07:11:29,386 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:11:29,386 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:11:29,386 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:11:29,386 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:11:29,840 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:11:31,774 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5904#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.base|))' at error location [2024-11-09 07:11:31,774 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:11:31,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:11:31,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2024-11-09 07:11:31,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202751910] [2024-11-09 07:11:31,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:11:31,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 07:11:31,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:11:31,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 07:11:31,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1638, Unknown=0, NotChecked=0, Total=1806 [2024-11-09 07:11:31,776 INFO L87 Difference]: Start difference. First operand 98 states and 111 transitions. Second operand has 28 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 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 07:11:32,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:11:32,679 INFO L93 Difference]: Finished difference Result 145 states and 161 transitions. [2024-11-09 07:11:32,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 07:11:32,680 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 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) Word has length 33 [2024-11-09 07:11:32,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:11:32,681 INFO L225 Difference]: With dead ends: 145 [2024-11-09 07:11:32,681 INFO L226 Difference]: Without dead ends: 145 [2024-11-09 07:11:32,681 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=202, Invalid=1960, Unknown=0, NotChecked=0, Total=2162 [2024-11-09 07:11:32,682 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 85 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 07:11:32,682 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 442 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 07:11:32,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-11-09 07:11:32,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 130. [2024-11-09 07:11:32,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 126 states have (on average 1.1746031746031746) internal successors, (148), 129 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:11:32,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 148 transitions. [2024-11-09 07:11:32,693 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 148 transitions. Word has length 33 [2024-11-09 07:11:32,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:11:32,693 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 148 transitions. [2024-11-09 07:11:32,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 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 07:11:32,695 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 148 transitions. [2024-11-09 07:11:32,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 07:11:32,695 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:11:32,696 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:11:32,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-09 07:11:32,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-09 07:11:32,896 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:11:32,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:11:32,897 INFO L85 PathProgramCache]: Analyzing trace with hash -2021791786, now seen corresponding path program 3 times [2024-11-09 07:11:32,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:11:32,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755764342] [2024-11-09 07:11:32,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:11:32,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:11:32,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:11:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:11:33,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:11:33,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755764342] [2024-11-09 07:11:33,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755764342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:11:33,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554701350] [2024-11-09 07:11:33,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:11:33,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:11:33,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:11:33,418 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:11:33,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 07:11:33,604 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:11:33,604 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:11:33,610 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-09 07:11:33,611 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:11:33,619 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 07:11:33,874 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:11:33,874 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:11:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:11:34,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554701350] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:11:34,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [307725322] [2024-11-09 07:11:34,415 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 07:11:34,416 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:11:34,416 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:11:34,416 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:11:34,417 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:11:35,325 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:11:37,756 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6415#(and (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_65| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_65| Int)) (and (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_65|) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_68| Int)) (and (= |ULTIMATE.start_cstrlcpy_~n~0#1| |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_68|) (not (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_68| 4294967296) 0)) (exists ((|v_#memory_int_209| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_61| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_63| Int)) (and (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_63|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_61|) 0)) (<= 1 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= (+ |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_61| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_63|)) (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_61|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (= (store |v_#memory_int_209| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_63| (store (select |v_#memory_int_209| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_63|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_61| (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_63|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_61|))) |#memory_int|) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_65|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= 2 |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_65|) (<= 2 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_63|) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_63|) 1))))) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_65| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_65|) |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_65|) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|))) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0))' at error location [2024-11-09 07:11:37,756 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:11:37,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:11:37,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2024-11-09 07:11:37,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401363157] [2024-11-09 07:11:37,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:11:37,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 07:11:37,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:11:37,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 07:11:37,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1141, Unknown=1, NotChecked=0, Total=1260 [2024-11-09 07:11:37,759 INFO L87 Difference]: Start difference. First operand 130 states and 148 transitions. Second operand has 21 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:11:38,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:11:38,325 INFO L93 Difference]: Finished difference Result 142 states and 160 transitions. [2024-11-09 07:11:38,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 07:11:38,326 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 0 states have call successors, (0), 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 07:11:38,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:11:38,327 INFO L225 Difference]: With dead ends: 142 [2024-11-09 07:11:38,327 INFO L226 Difference]: Without dead ends: 142 [2024-11-09 07:11:38,328 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=140, Invalid=1341, Unknown=1, NotChecked=0, Total=1482 [2024-11-09 07:11:38,328 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 49 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:11:38,328 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 250 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 07:11:38,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-09 07:11:38,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 134. [2024-11-09 07:11:38,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 130 states have (on average 1.1692307692307693) internal successors, (152), 133 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:11:38,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 152 transitions. [2024-11-09 07:11:38,339 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 152 transitions. Word has length 33 [2024-11-09 07:11:38,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:11:38,339 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 152 transitions. [2024-11-09 07:11:38,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.0) internal successors, (80), 20 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:11:38,339 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 152 transitions. [2024-11-09 07:11:38,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-09 07:11:38,340 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:11:38,340 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:11:38,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-09 07:11:38,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-09 07:11:38,541 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:11:38,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:11:38,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1748964086, now seen corresponding path program 2 times [2024-11-09 07:11:38,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:11:38,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261379911] [2024-11-09 07:11:38,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:11:38,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:11:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:11:39,041 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 07:11:39,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:11:39,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261379911] [2024-11-09 07:11:39,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261379911] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:11:39,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914612945] [2024-11-09 07:11:39,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:11:39,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:11:39,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:11:39,044 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:11:39,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 07:11:39,291 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 07:11:39,291 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:11:39,292 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-09 07:11:39,294 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:11:39,603 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 07:11:39,603 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:11:39,927 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 07:11:39,997 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 07:11:39,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914612945] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:11:39,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [170099512] [2024-11-09 07:11:39,999 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 07:11:39,999 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:11:40,000 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:11:40,000 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:11:40,000 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:11:40,891 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:11:43,334 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6937#(and (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_73| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_74| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 2 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_74|) (<= 1 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_73|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_74|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_73|) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0))' at error location [2024-11-09 07:11:43,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:11:43,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:11:43,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2024-11-09 07:11:43,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713236233] [2024-11-09 07:11:43,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:11:43,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-09 07:11:43,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:11:43,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-09 07:11:43,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1566, Unknown=2, NotChecked=0, Total=1722 [2024-11-09 07:11:43,336 INFO L87 Difference]: Start difference. First operand 134 states and 152 transitions. Second operand has 27 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 27 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 07:11:44,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:11:44,005 INFO L93 Difference]: Finished difference Result 147 states and 163 transitions. [2024-11-09 07:11:44,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 07:11:44,006 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 27 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) Word has length 34 [2024-11-09 07:11:44,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:11:44,007 INFO L225 Difference]: With dead ends: 147 [2024-11-09 07:11:44,007 INFO L226 Difference]: Without dead ends: 147 [2024-11-09 07:11:44,008 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=190, Invalid=1878, Unknown=2, NotChecked=0, Total=2070 [2024-11-09 07:11:44,008 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 07:11:44,008 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 398 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 07:11:44,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-09 07:11:44,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 135. [2024-11-09 07:11:44,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 131 states have (on average 1.1526717557251909) internal successors, (151), 134 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 07:11:44,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 151 transitions. [2024-11-09 07:11:44,013 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 151 transitions. Word has length 34 [2024-11-09 07:11:44,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:11:44,013 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 151 transitions. [2024-11-09 07:11:44,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 27 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 07:11:44,013 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 151 transitions. [2024-11-09 07:11:44,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 07:11:44,014 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:11:44,014 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:11:44,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-09 07:11:44,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-09 07:11:44,215 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:11:44,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:11:44,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1209477744, now seen corresponding path program 2 times [2024-11-09 07:11:44,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:11:44,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966089635] [2024-11-09 07:11:44,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:11:44,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:11:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:11:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:11:46,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:11:46,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966089635] [2024-11-09 07:11:46,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966089635] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:11:46,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501200159] [2024-11-09 07:11:46,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:11:46,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:11:46,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:11:46,145 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:11:46,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 07:11:46,335 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 07:11:46,336 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:11:46,338 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-09 07:11:46,341 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:11:46,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 07:11:47,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:11:47,124 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 23 treesize of output 11 [2024-11-09 07:11:47,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:11:47,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-09 07:11:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:11:47,634 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:11:54,824 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 264 treesize of output 252 [2024-11-09 07:11:55,650 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:11:55,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501200159] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:11:55,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [23493761] [2024-11-09 07:11:55,653 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 07:11:55,653 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:11:55,653 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:11:55,654 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:11:55,654 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:11:59,359 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:12:15,505 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7490#(and (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_96| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_95| Int)) (and (= |ULTIMATE.start_cstrlcpy_~s~0#1.offset| (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_96| 1)) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_95|) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_96|) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_95| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_96|))) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0))' at error location [2024-11-09 07:12:15,505 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:12:15,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:12:15,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 15] total 43 [2024-11-09 07:12:15,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473383214] [2024-11-09 07:12:15,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:12:15,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-09 07:12:15,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:12:15,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-09 07:12:15,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=3917, Unknown=14, NotChecked=0, Total=4160 [2024-11-09 07:12:15,508 INFO L87 Difference]: Start difference. First operand 135 states and 151 transitions. Second operand has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 43 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 07:12:18,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:12:18,168 INFO L93 Difference]: Finished difference Result 151 states and 166 transitions. [2024-11-09 07:12:18,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-09 07:12:18,168 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 43 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) Word has length 35 [2024-11-09 07:12:18,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:12:18,169 INFO L225 Difference]: With dead ends: 151 [2024-11-09 07:12:18,169 INFO L226 Difference]: Without dead ends: 128 [2024-11-09 07:12:18,170 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 26.9s TimeCoverageRelationStatistics Valid=379, Invalid=6087, Unknown=14, NotChecked=0, Total=6480 [2024-11-09 07:12:18,171 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 54 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:12:18,171 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 603 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 07:12:18,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-09 07:12:18,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2024-11-09 07:12:18,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 120 states have (on average 1.15) internal successors, (138), 123 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:12:18,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 138 transitions. [2024-11-09 07:12:18,175 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 138 transitions. Word has length 35 [2024-11-09 07:12:18,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:12:18,175 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 138 transitions. [2024-11-09 07:12:18,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 43 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 07:12:18,176 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 138 transitions. [2024-11-09 07:12:18,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-09 07:12:18,177 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:12:18,177 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:12:18,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-09 07:12:18,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-09 07:12:18,381 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:12:18,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:12:18,382 INFO L85 PathProgramCache]: Analyzing trace with hash -2103620927, now seen corresponding path program 5 times [2024-11-09 07:12:18,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:12:18,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667479945] [2024-11-09 07:12:18,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:12:18,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:12:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:12:19,304 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:12:19,305 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:12:19,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667479945] [2024-11-09 07:12:19,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667479945] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:12:19,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467967464] [2024-11-09 07:12:19,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:12:19,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:12:19,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:12:19,306 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:12:19,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 07:12:19,456 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 07:12:19,456 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:12:19,458 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-09 07:12:19,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:12:19,469 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 18 treesize of output 16 [2024-11-09 07:12:19,786 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 07:12:19,873 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 07:12:19,948 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:12:19,948 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:12:20,099 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:12:20,100 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 07:12:20,114 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:12:20,115 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 07:12:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:12:20,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467967464] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:12:20,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [712024676] [2024-11-09 07:12:20,377 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 07:12:20,378 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:12:20,378 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:12:20,378 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:12:20,378 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:12:20,825 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:12:23,319 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8056#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.base|))' at error location [2024-11-09 07:12:23,319 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:12:23,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:12:23,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 27 [2024-11-09 07:12:23,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881375400] [2024-11-09 07:12:23,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:12:23,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 07:12:23,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:12:23,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 07:12:23,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1674, Unknown=10, NotChecked=0, Total=1806 [2024-11-09 07:12:23,321 INFO L87 Difference]: Start difference. First operand 124 states and 138 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 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 07:12:24,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:12:24,605 INFO L93 Difference]: Finished difference Result 174 states and 193 transitions. [2024-11-09 07:12:24,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 07:12:24,606 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 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 36 [2024-11-09 07:12:24,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:12:24,607 INFO L225 Difference]: With dead ends: 174 [2024-11-09 07:12:24,607 INFO L226 Difference]: Without dead ends: 153 [2024-11-09 07:12:24,608 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=186, Invalid=2665, Unknown=11, NotChecked=0, Total=2862 [2024-11-09 07:12:24,609 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 28 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 07:12:24,609 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 466 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 07:12:24,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-11-09 07:12:24,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 141. [2024-11-09 07:12:24,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 137 states have (on average 1.1532846715328466) internal successors, (158), 140 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:12:24,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 158 transitions. [2024-11-09 07:12:24,615 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 158 transitions. Word has length 36 [2024-11-09 07:12:24,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:12:24,615 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 158 transitions. [2024-11-09 07:12:24,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 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 07:12:24,615 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 158 transitions. [2024-11-09 07:12:24,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-09 07:12:24,616 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:12:24,616 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:12:24,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-09 07:12:24,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-09 07:12:24,817 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:12:24,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:12:24,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1006196551, now seen corresponding path program 4 times [2024-11-09 07:12:24,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:12:24,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931495600] [2024-11-09 07:12:24,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:12:24,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:12:24,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:12:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 07:12:25,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:12:25,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931495600] [2024-11-09 07:12:25,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931495600] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:12:25,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264506714] [2024-11-09 07:12:25,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 07:12:25,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:12:25,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:12:25,086 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:12:25,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 07:12:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:12:25,226 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-09 07:12:25,228 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:12:25,235 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 07:12:25,459 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 07:12:25,577 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 07:12:25,695 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 07:12:25,820 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:12:25,820 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:12:26,115 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_744 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_744) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-09 07:12:26,132 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:12:26,132 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 07:12:26,144 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:12:26,145 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 07:12:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 4 not checked. [2024-11-09 07:12:26,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264506714] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:12:26,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [641346362] [2024-11-09 07:12:26,376 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 07:12:26,377 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:12:26,377 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:12:26,377 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:12:26,377 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:12:27,429 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:12:30,531 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8659#(and (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_97| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_97| Int)) (and (= |ULTIMATE.start_cstrlcpy_~s~0#1.base| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_97|) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_99| Int)) (and (not (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_99| 4294967296) 0)) (= |ULTIMATE.start_cstrlcpy_~n~0#1| |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_99|) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_94| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_97| Int) (|v_#memory_int_295| (Array Int (Array Int Int)))) (and (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_97|) (<= 1 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 2 |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_97|) (<= 2 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_97|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_97|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_94|) 0)) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= (+ |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_94| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_97|)) (= |#memory_int| (store |v_#memory_int_295| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_97| (store (select |v_#memory_int_295| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_97|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_94| (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_97|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_94|)))) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_94|) (= 1 (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_97|)))))) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_97| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_97|) |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_97|) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|))))' at error location [2024-11-09 07:12:30,531 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:12:30,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:12:30,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 29 [2024-11-09 07:12:30,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62148343] [2024-11-09 07:12:30,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:12:30,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-09 07:12:30,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:12:30,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-09 07:12:30,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1659, Unknown=36, NotChecked=82, Total=1892 [2024-11-09 07:12:30,534 INFO L87 Difference]: Start difference. First operand 141 states and 158 transitions. Second operand has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 29 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 07:12:32,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:12:32,789 INFO L93 Difference]: Finished difference Result 198 states and 217 transitions. [2024-11-09 07:12:32,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-09 07:12:32,790 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 29 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 38 [2024-11-09 07:12:32,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:12:32,791 INFO L225 Difference]: With dead ends: 198 [2024-11-09 07:12:32,791 INFO L226 Difference]: Without dead ends: 193 [2024-11-09 07:12:32,792 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=200, Invalid=3068, Unknown=42, NotChecked=112, Total=3422 [2024-11-09 07:12:32,793 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:12:32,793 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 579 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1063 Invalid, 0 Unknown, 101 Unchecked, 1.3s Time] [2024-11-09 07:12:32,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-11-09 07:12:32,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 161. [2024-11-09 07:12:32,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 157 states have (on average 1.1401273885350318) internal successors, (179), 160 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:12:32,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 179 transitions. [2024-11-09 07:12:32,799 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 179 transitions. Word has length 38 [2024-11-09 07:12:32,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:12:32,799 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 179 transitions. [2024-11-09 07:12:32,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 29 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 07:12:32,800 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 179 transitions. [2024-11-09 07:12:32,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 07:12:32,800 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:12:32,800 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:12:32,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-09 07:12:33,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-09 07:12:33,005 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:12:33,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:12:33,006 INFO L85 PathProgramCache]: Analyzing trace with hash 909393837, now seen corresponding path program 6 times [2024-11-09 07:12:33,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:12:33,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693044395] [2024-11-09 07:12:33,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:12:33,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:12:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:12:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 5 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:12:33,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:12:33,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693044395] [2024-11-09 07:12:33,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693044395] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:12:33,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784076943] [2024-11-09 07:12:33,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:12:33,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:12:33,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:12:33,790 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:12:33,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 07:12:33,969 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:12:33,969 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:12:33,972 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-09 07:12:33,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:12:33,990 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 07:12:34,496 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:12:34,497 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:12:35,389 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:12:35,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784076943] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:12:35,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [529539772] [2024-11-09 07:12:35,390 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 07:12:35,390 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:12:35,391 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:12:35,391 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:12:35,391 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:12:35,912 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:12:38,087 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9323#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.base|))' at error location [2024-11-09 07:12:38,087 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:12:38,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:12:38,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2024-11-09 07:12:38,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50108840] [2024-11-09 07:12:38,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:12:38,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 07:12:38,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:12:38,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 07:12:38,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1871, Unknown=0, NotChecked=0, Total=2070 [2024-11-09 07:12:38,090 INFO L87 Difference]: Start difference. First operand 161 states and 179 transitions. Second operand has 31 states, 30 states have (on average 3.5) internal successors, (105), 30 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:12:39,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:12:39,477 INFO L93 Difference]: Finished difference Result 235 states and 257 transitions. [2024-11-09 07:12:39,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 07:12:39,478 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.5) internal successors, (105), 30 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-09 07:12:39,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:12:39,479 INFO L225 Difference]: With dead ends: 235 [2024-11-09 07:12:39,479 INFO L226 Difference]: Without dead ends: 235 [2024-11-09 07:12:39,479 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 79 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=242, Invalid=2308, Unknown=0, NotChecked=0, Total=2550 [2024-11-09 07:12:39,480 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 72 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:12:39,480 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 643 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 07:12:39,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-11-09 07:12:39,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 207. [2024-11-09 07:12:39,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 203 states have (on average 1.1379310344827587) internal successors, (231), 206 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 07:12:39,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 231 transitions. [2024-11-09 07:12:39,486 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 231 transitions. Word has length 39 [2024-11-09 07:12:39,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:12:39,486 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 231 transitions. [2024-11-09 07:12:39,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.5) internal successors, (105), 30 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:12:39,486 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 231 transitions. [2024-11-09 07:12:39,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-09 07:12:39,487 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:12:39,487 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:12:39,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-09 07:12:39,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-09 07:12:39,688 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:12:39,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:12:39,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1249084604, now seen corresponding path program 3 times [2024-11-09 07:12:39,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:12:39,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871314025] [2024-11-09 07:12:39,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:12:39,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:12:39,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:12:41,352 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:12:41,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:12:41,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871314025] [2024-11-09 07:12:41,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871314025] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:12:41,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209045589] [2024-11-09 07:12:41,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:12:41,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:12:41,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:12:41,355 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:12:41,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-09 07:12:41,553 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:12:41,553 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:12:41,555 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-09 07:12:41,558 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:12:41,566 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 07:12:42,036 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 07:12:42,224 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 07:12:42,390 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 07:12:42,503 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 07:12:42,625 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:12:42,626 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:12:42,783 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_831 (Array Int Int)) (v_ArrVal_830 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_830) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_831) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) is different from false [2024-11-09 07:12:42,798 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_831 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_831) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2024-11-09 07:12:43,052 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:12:43,053 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 07:12:43,063 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:12:43,063 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 07:12:43,075 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 07:12:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 7 not checked. [2024-11-09 07:12:43,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209045589] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:12:43,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1286059752] [2024-11-09 07:12:43,457 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 07:12:43,458 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:12:43,458 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:12:43,458 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:12:43,458 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:12:45,024 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:12:56,988 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10068#(and (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_135| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_136| Int)) (and (= |ULTIMATE.start_cstrlcpy_~s~0#1.offset| (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_136| 1)) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_135|) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_136|) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_136|) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_135| |ULTIMATE.start_cstrlcpy_~s~0#1.base|))))' at error location [2024-11-09 07:12:56,988 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:12:56,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:12:56,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14, 14] total 43 [2024-11-09 07:12:56,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118922331] [2024-11-09 07:12:56,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:12:56,989 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-09 07:12:56,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:12:56,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-09 07:12:56,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=3650, Unknown=44, NotChecked=246, Total=4160 [2024-11-09 07:12:56,991 INFO L87 Difference]: Start difference. First operand 207 states and 231 transitions. Second operand has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 43 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:12:58,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:12:58,358 INFO L93 Difference]: Finished difference Result 218 states and 242 transitions. [2024-11-09 07:12:58,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-09 07:12:58,358 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 43 states have internal predecessors, (106), 0 states have call successors, (0), 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 40 [2024-11-09 07:12:58,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:12:58,359 INFO L225 Difference]: With dead ends: 218 [2024-11-09 07:12:58,359 INFO L226 Difference]: Without dead ends: 180 [2024-11-09 07:12:58,360 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=296, Invalid=4638, Unknown=44, NotChecked=278, Total=5256 [2024-11-09 07:12:58,360 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 23 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 07:12:58,360 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 698 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 836 Invalid, 0 Unknown, 121 Unchecked, 0.7s Time] [2024-11-09 07:12:58,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-11-09 07:12:58,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2024-11-09 07:12:58,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 176 states have (on average 1.1477272727272727) internal successors, (202), 179 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:12:58,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 202 transitions. [2024-11-09 07:12:58,365 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 202 transitions. Word has length 40 [2024-11-09 07:12:58,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:12:58,365 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 202 transitions. [2024-11-09 07:12:58,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.409090909090909) internal successors, (106), 43 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:12:58,365 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 202 transitions. [2024-11-09 07:12:58,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-09 07:12:58,366 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:12:58,366 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:12:58,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-09 07:12:58,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:12:58,567 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:12:58,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:12:58,567 INFO L85 PathProgramCache]: Analyzing trace with hash -371547251, now seen corresponding path program 4 times [2024-11-09 07:12:58,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:12:58,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086520553] [2024-11-09 07:12:58,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:12:58,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:12:58,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:12:59,505 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:12:59,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:12:59,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086520553] [2024-11-09 07:12:59,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086520553] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:12:59,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855733887] [2024-11-09 07:12:59,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 07:12:59,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:12:59,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:12:59,508 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:12:59,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-09 07:12:59,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:12:59,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-09 07:12:59,660 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:12:59,666 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 07:12:59,992 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 07:13:00,119 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 07:13:00,157 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 07:13:00,184 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:13:00,185 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:13:00,214 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_875 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_875) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-09 07:13:00,342 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_875 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_875) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-09 07:13:00,361 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:13:00,361 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 07:13:00,372 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:13:00,372 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 07:13:00,572 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2024-11-09 07:13:00,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855733887] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:13:00,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1902322630] [2024-11-09 07:13:00,574 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 07:13:00,574 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:13:00,574 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:13:00,574 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:13:00,575 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:13:03,958 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:13:24,745 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10776#(and (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_148| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_147| Int)) (and (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_148| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_147|) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_148|) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_148|) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_147| |ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0))' at error location [2024-11-09 07:13:24,745 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:13:24,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:13:24,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 30 [2024-11-09 07:13:24,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714112917] [2024-11-09 07:13:24,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:13:24,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 07:13:24,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:13:24,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 07:13:24,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2268, Unknown=30, NotChecked=194, Total=2652 [2024-11-09 07:13:24,748 INFO L87 Difference]: Start difference. First operand 180 states and 202 transitions. Second operand has 31 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 30 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:13:25,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:13:25,834 INFO L93 Difference]: Finished difference Result 201 states and 222 transitions. [2024-11-09 07:13:25,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 07:13:25,835 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 30 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-09 07:13:25,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:13:25,836 INFO L225 Difference]: With dead ends: 201 [2024-11-09 07:13:25,837 INFO L226 Difference]: Without dead ends: 178 [2024-11-09 07:13:25,837 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=188, Invalid=2651, Unknown=31, NotChecked=210, Total=3080 [2024-11-09 07:13:25,838 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 07:13:25,838 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 499 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 584 Invalid, 0 Unknown, 103 Unchecked, 0.7s Time] [2024-11-09 07:13:25,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-09 07:13:25,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 176. [2024-11-09 07:13:25,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 172 states have (on average 1.1395348837209303) internal successors, (196), 175 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:13:25,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 196 transitions. [2024-11-09 07:13:25,842 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 196 transitions. Word has length 41 [2024-11-09 07:13:25,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:13:25,843 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 196 transitions. [2024-11-09 07:13:25,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 30 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:13:25,843 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 196 transitions. [2024-11-09 07:13:25,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-09 07:13:25,844 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:13:25,844 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:13:25,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-09 07:13:26,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-09 07:13:26,045 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:13:26,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:13:26,046 INFO L85 PathProgramCache]: Analyzing trace with hash -901857692, now seen corresponding path program 7 times [2024-11-09 07:13:26,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:13:26,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616523720] [2024-11-09 07:13:26,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:13:26,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:13:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:13:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 11 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:13:27,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:13:27,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616523720] [2024-11-09 07:13:27,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616523720] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:13:27,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45945839] [2024-11-09 07:13:27,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 07:13:27,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:13:27,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:13:27,441 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:13:27,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-09 07:13:27,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:13:27,593 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-09 07:13:27,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:13:27,602 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 07:13:28,084 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 07:13:28,196 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 07:13:28,297 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:13:28,297 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:13:28,349 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_914 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_914) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-09 07:13:28,377 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:13:28,378 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 07:13:28,394 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:13:28,394 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 07:13:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:13:28,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45945839] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:13:28,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [444894152] [2024-11-09 07:13:28,676 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 07:13:28,676 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:13:28,676 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:13:28,676 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:13:28,677 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:13:29,099 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:13:31,553 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11461#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.base|))' at error location [2024-11-09 07:13:31,553 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:13:31,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:13:31,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 30 [2024-11-09 07:13:31,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350852989] [2024-11-09 07:13:31,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:13:31,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 07:13:31,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:13:31,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 07:13:31,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1856, Unknown=1, NotChecked=86, Total=2070 [2024-11-09 07:13:31,555 INFO L87 Difference]: Start difference. First operand 176 states and 196 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:13:33,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:13:33,639 INFO L93 Difference]: Finished difference Result 240 states and 266 transitions. [2024-11-09 07:13:33,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 07:13:33,640 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-11-09 07:13:33,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:13:33,642 INFO L225 Difference]: With dead ends: 240 [2024-11-09 07:13:33,642 INFO L226 Difference]: Without dead ends: 216 [2024-11-09 07:13:33,642 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 93 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=200, Invalid=3109, Unknown=1, NotChecked=112, Total=3422 [2024-11-09 07:13:33,643 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 29 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:13:33,643 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 541 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 845 Invalid, 0 Unknown, 56 Unchecked, 1.1s Time] [2024-11-09 07:13:33,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2024-11-09 07:13:33,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 196. [2024-11-09 07:13:33,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 192 states have (on average 1.1458333333333333) internal successors, (220), 195 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:13:33,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 220 transitions. [2024-11-09 07:13:33,649 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 220 transitions. Word has length 42 [2024-11-09 07:13:33,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:13:33,650 INFO L471 AbstractCegarLoop]: Abstraction has 196 states and 220 transitions. [2024-11-09 07:13:33,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:13:33,650 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 220 transitions. [2024-11-09 07:13:33,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-09 07:13:33,651 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:13:33,651 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:13:33,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-09 07:13:33,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:13:33,852 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:13:33,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:13:33,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1146123155, now seen corresponding path program 5 times [2024-11-09 07:13:33,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:13:33,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424643055] [2024-11-09 07:13:33,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:13:33,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:13:33,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:13:34,557 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 07:13:34,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:13:34,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424643055] [2024-11-09 07:13:34,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424643055] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:13:34,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537325563] [2024-11-09 07:13:34,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:13:34,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:13:34,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:13:34,560 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:13:34,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-09 07:13:34,770 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 07:13:34,770 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:13:34,773 INFO L255 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-09 07:13:34,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:13:34,781 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 07:13:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 07:13:35,249 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:13:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 07:13:36,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537325563] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:13:36,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1645801443] [2024-11-09 07:13:36,109 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 07:13:36,109 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:13:36,110 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:13:36,110 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:13:36,110 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:13:36,948 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:13:40,109 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12229#(and (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_129| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_128| Int)) (and (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_134| Int)) (and (not (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_134| 4294967296) 0)) (exists ((|v_#memory_int_404| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_124| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_130| Int)) (and (<= 1 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_130|) 1) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_129|) (<= 2 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_130|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_128|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_130|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_124|) 0)) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_124|) (= |#memory_int| (store |v_#memory_int_404| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_130| (store (select |v_#memory_int_404| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_130|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_124| (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_130|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_124|)))) (<= (+ |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_124| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_130|)))) (= |ULTIMATE.start_cstrlcpy_~n~0#1| |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_134|))) (= |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_128| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_129| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_128|) |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_129|))) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0))' at error location [2024-11-09 07:13:40,109 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:13:40,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:13:40,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2024-11-09 07:13:40,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458220399] [2024-11-09 07:13:40,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:13:40,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-09 07:13:40,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:13:40,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-09 07:13:40,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1969, Unknown=2, NotChecked=0, Total=2162 [2024-11-09 07:13:40,111 INFO L87 Difference]: Start difference. First operand 196 states and 220 transitions. Second operand has 32 states, 31 states have (on average 3.6774193548387095) internal successors, (114), 31 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:13:40,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:13:40,899 INFO L93 Difference]: Finished difference Result 208 states and 232 transitions. [2024-11-09 07:13:40,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 07:13:40,900 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.6774193548387095) internal successors, (114), 31 states have internal predecessors, (114), 0 states have call successors, (0), 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 07:13:40,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:13:40,901 INFO L225 Difference]: With dead ends: 208 [2024-11-09 07:13:40,901 INFO L226 Difference]: Without dead ends: 208 [2024-11-09 07:13:40,902 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=237, Invalid=2311, Unknown=2, NotChecked=0, Total=2550 [2024-11-09 07:13:40,902 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 93 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 07:13:40,902 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 251 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 07:13:40,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2024-11-09 07:13:40,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 200. [2024-11-09 07:13:40,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 196 states have (on average 1.1428571428571428) internal successors, (224), 199 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:13:40,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 224 transitions. [2024-11-09 07:13:40,908 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 224 transitions. Word has length 44 [2024-11-09 07:13:40,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:13:40,909 INFO L471 AbstractCegarLoop]: Abstraction has 200 states and 224 transitions. [2024-11-09 07:13:40,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.6774193548387095) internal successors, (114), 31 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:13:40,909 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 224 transitions. [2024-11-09 07:13:40,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 07:13:40,910 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:13:40,910 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:13:40,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-09 07:13:41,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:13:41,111 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:13:41,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:13:41,111 INFO L85 PathProgramCache]: Analyzing trace with hash 705516112, now seen corresponding path program 8 times [2024-11-09 07:13:41,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:13:41,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376554449] [2024-11-09 07:13:41,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:13:41,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:13:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:13:42,169 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:13:42,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:13:42,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376554449] [2024-11-09 07:13:42,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376554449] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:13:42,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949478131] [2024-11-09 07:13:42,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:13:42,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:13:42,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:13:42,174 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:13:42,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-09 07:13:42,382 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-09 07:13:42,382 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:13:42,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-09 07:13:42,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:13:42,394 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 07:13:43,194 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 26 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:13:43,195 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:13:44,407 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 26 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:13:44,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949478131] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:13:44,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [470365841] [2024-11-09 07:13:44,409 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 07:13:44,409 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:13:44,410 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:13:44,410 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:13:44,410 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:13:44,863 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:13:47,625 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12968#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.base|))' at error location [2024-11-09 07:13:47,625 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:13:47,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:13:47,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2024-11-09 07:13:47,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134842334] [2024-11-09 07:13:47,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:13:47,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-09 07:13:47,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:13:47,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-09 07:13:47,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=3092, Unknown=0, NotChecked=0, Total=3422 [2024-11-09 07:13:47,627 INFO L87 Difference]: Start difference. First operand 200 states and 224 transitions. Second operand has 44 states, 43 states have (on average 3.13953488372093) internal successors, (135), 43 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 07:13:49,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:13:49,324 INFO L93 Difference]: Finished difference Result 287 states and 316 transitions. [2024-11-09 07:13:49,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 07:13:49,325 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 3.13953488372093) internal successors, (135), 43 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 45 [2024-11-09 07:13:49,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:13:49,326 INFO L225 Difference]: With dead ends: 287 [2024-11-09 07:13:49,326 INFO L226 Difference]: Without dead ends: 287 [2024-11-09 07:13:49,326 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1606 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=414, Invalid=3746, Unknown=0, NotChecked=0, Total=4160 [2024-11-09 07:13:49,327 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 162 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 954 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:13:49,327 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 628 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 954 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 07:13:49,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2024-11-09 07:13:49,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 250. [2024-11-09 07:13:49,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 246 states have (on average 1.1422764227642277) internal successors, (281), 249 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:13:49,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 281 transitions. [2024-11-09 07:13:49,332 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 281 transitions. Word has length 45 [2024-11-09 07:13:49,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:13:49,333 INFO L471 AbstractCegarLoop]: Abstraction has 250 states and 281 transitions. [2024-11-09 07:13:49,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 3.13953488372093) internal successors, (135), 43 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 07:13:49,333 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 281 transitions. [2024-11-09 07:13:49,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 07:13:49,333 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:13:49,334 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:13:49,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-09 07:13:49,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-09 07:13:49,534 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:13:49,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:13:49,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1170079425, now seen corresponding path program 3 times [2024-11-09 07:13:49,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:13:49,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966317627] [2024-11-09 07:13:49,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:13:49,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:13:49,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:13:50,129 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 07:13:50,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:13:50,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966317627] [2024-11-09 07:13:50,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966317627] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:13:50,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154432342] [2024-11-09 07:13:50,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:13:50,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:13:50,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:13:50,131 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:13:50,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-09 07:13:50,366 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:13:50,366 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:13:50,369 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-09 07:13:50,370 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:13:50,791 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 07:13:50,791 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:13:51,200 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 07:13:51,529 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 07:13:51,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154432342] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:13:51,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1526719174] [2024-11-09 07:13:51,530 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 07:13:51,530 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:13:51,530 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:13:51,531 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:13:51,531 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:13:52,270 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:13:55,012 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13828#(and (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_144| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_138| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 2 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_144|) (<= 1 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_144|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_138|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_138|) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.base|))))' at error location [2024-11-09 07:13:55,012 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:13:55,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:13:55,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2024-11-09 07:13:55,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490859267] [2024-11-09 07:13:55,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:13:55,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-09 07:13:55,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:13:55,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-09 07:13:55,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1938, Unknown=2, NotChecked=0, Total=2162 [2024-11-09 07:13:55,014 INFO L87 Difference]: Start difference. First operand 250 states and 281 transitions. Second operand has 32 states, 31 states have (on average 3.2903225806451615) internal successors, (102), 31 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 07:13:55,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:13:55,930 INFO L93 Difference]: Finished difference Result 276 states and 305 transitions. [2024-11-09 07:13:55,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 07:13:55,931 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.2903225806451615) internal successors, (102), 31 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 45 [2024-11-09 07:13:55,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:13:55,932 INFO L225 Difference]: With dead ends: 276 [2024-11-09 07:13:55,932 INFO L226 Difference]: Without dead ends: 276 [2024-11-09 07:13:55,932 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=260, Invalid=2288, Unknown=2, NotChecked=0, Total=2550 [2024-11-09 07:13:55,933 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 41 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 07:13:55,933 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 479 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 07:13:55,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2024-11-09 07:13:55,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 252. [2024-11-09 07:13:55,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 248 states have (on average 1.1330645161290323) internal successors, (281), 251 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:13:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 281 transitions. [2024-11-09 07:13:55,940 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 281 transitions. Word has length 45 [2024-11-09 07:13:55,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:13:55,940 INFO L471 AbstractCegarLoop]: Abstraction has 252 states and 281 transitions. [2024-11-09 07:13:55,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.2903225806451615) internal successors, (102), 31 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 07:13:55,941 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 281 transitions. [2024-11-09 07:13:55,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 07:13:55,942 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:13:55,942 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:13:55,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-09 07:13:56,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-09 07:13:56,143 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:13:56,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:13:56,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1593757439, now seen corresponding path program 5 times [2024-11-09 07:13:56,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:13:56,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088303892] [2024-11-09 07:13:56,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:13:56,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:13:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:13:59,250 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:13:59,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:13:59,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088303892] [2024-11-09 07:13:59,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088303892] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:13:59,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118689128] [2024-11-09 07:13:59,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:13:59,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:13:59,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:13:59,251 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:13:59,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-09 07:13:59,410 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 07:13:59,410 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:13:59,412 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-11-09 07:13:59,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:13:59,421 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 07:13:59,780 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 07:14:00,101 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 07:14:00,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2024-11-09 07:14:00,116 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 07:14:00,521 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 07:14:00,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2024-11-09 07:14:00,578 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-11-09 07:14:00,936 INFO L349 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2024-11-09 07:14:00,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 47 [2024-11-09 07:14:01,851 INFO L349 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2024-11-09 07:14:01,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 30 [2024-11-09 07:14:02,222 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:14:02,222 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:14:03,639 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:14:03,639 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 33 [2024-11-09 07:14:04,246 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:14:04,246 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 47 treesize of output 36 [2024-11-09 07:14:04,273 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:14:04,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 59 [2024-11-09 07:14:04,305 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:14:04,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 37 [2024-11-09 07:14:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:14:05,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118689128] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:14:05,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1496253570] [2024-11-09 07:14:05,799 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 07:14:05,799 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:14:05,800 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:14:05,800 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:14:05,800 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:14:09,385 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:14:27,037 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14706#(and (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_197| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_195| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_195|) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_197|) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_197|) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_197| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_195| |ULTIMATE.start_cstrlcpy_~s~0#1.base|))))' at error location [2024-11-09 07:14:27,037 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:14:27,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:14:27,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 16, 16] total 56 [2024-11-09 07:14:27,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310546259] [2024-11-09 07:14:27,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:14:27,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-09 07:14:27,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:14:27,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-09 07:14:27,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=5639, Unknown=17, NotChecked=0, Total=6006 [2024-11-09 07:14:27,039 INFO L87 Difference]: Start difference. First operand 252 states and 281 transitions. Second operand has 57 states, 57 states have (on average 2.245614035087719) internal successors, (128), 56 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:35,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:14:35,562 INFO L93 Difference]: Finished difference Result 325 states and 353 transitions. [2024-11-09 07:14:35,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-09 07:14:35,563 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.245614035087719) internal successors, (128), 56 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-11-09 07:14:35,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:14:35,564 INFO L225 Difference]: With dead ends: 325 [2024-11-09 07:14:35,564 INFO L226 Difference]: Without dead ends: 300 [2024-11-09 07:14:35,566 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2647 ImplicationChecksByTransitivity, 29.0s TimeCoverageRelationStatistics Valid=801, Invalid=11838, Unknown=17, NotChecked=0, Total=12656 [2024-11-09 07:14:35,566 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 124 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:14:35,567 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 684 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1394 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-09 07:14:35,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2024-11-09 07:14:35,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 220. [2024-11-09 07:14:35,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 216 states have (on average 1.1481481481481481) internal successors, (248), 219 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 248 transitions. [2024-11-09 07:14:35,573 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 248 transitions. Word has length 46 [2024-11-09 07:14:35,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:14:35,574 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 248 transitions. [2024-11-09 07:14:35,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.245614035087719) internal successors, (128), 56 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:14:35,574 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 248 transitions. [2024-11-09 07:14:35,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-09 07:14:35,575 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:14:35,575 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:14:35,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-09 07:14:35,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-09 07:14:35,776 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:14:35,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:14:35,777 INFO L85 PathProgramCache]: Analyzing trace with hash -2135386256, now seen corresponding path program 6 times [2024-11-09 07:14:35,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:14:35,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639599835] [2024-11-09 07:14:35,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:14:35,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:14:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:14:36,893 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:14:36,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:14:36,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639599835] [2024-11-09 07:14:36,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639599835] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:14:36,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760576553] [2024-11-09 07:14:36,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:14:36,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:14:36,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:14:36,895 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:14:36,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-09 07:14:37,078 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:14:37,078 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:14:37,080 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-09 07:14:37,082 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:14:37,518 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 07:14:37,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:14:37,776 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 25 treesize of output 13 [2024-11-09 07:14:37,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:14:37,934 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 21 treesize of output 20 [2024-11-09 07:14:38,507 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:14:38,507 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:15:06,980 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 264 treesize of output 252 [2024-11-09 07:15:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:15:08,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760576553] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:15:08,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [55593165] [2024-11-09 07:15:08,749 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 07:15:08,749 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:15:08,750 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:15:08,750 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:15:08,750 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:15:10,498 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:15:27,930 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15663#(and (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_211| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_209| Int)) (and (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_211| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_209|) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_211|) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_209| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_211|))) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0))' at error location [2024-11-09 07:15:27,930 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:15:27,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:15:27,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 44 [2024-11-09 07:15:27,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426584046] [2024-11-09 07:15:27,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:15:27,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-09 07:15:27,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:15:27,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-09 07:15:27,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=4071, Unknown=18, NotChecked=0, Total=4290 [2024-11-09 07:15:27,932 INFO L87 Difference]: Start difference. First operand 220 states and 248 transitions. Second operand has 45 states, 45 states have (on average 2.8) internal successors, (126), 44 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:15:34,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:15:34,020 INFO L93 Difference]: Finished difference Result 257 states and 284 transitions. [2024-11-09 07:15:34,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-09 07:15:34,021 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.8) internal successors, (126), 44 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-11-09 07:15:34,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:15:34,022 INFO L225 Difference]: With dead ends: 257 [2024-11-09 07:15:34,022 INFO L226 Difference]: Without dead ends: 231 [2024-11-09 07:15:34,023 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 51.5s TimeCoverageRelationStatistics Valid=305, Invalid=6157, Unknown=18, NotChecked=0, Total=6480 [2024-11-09 07:15:34,024 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:15:34,024 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 774 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-09 07:15:34,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-09 07:15:34,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 216. [2024-11-09 07:15:34,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 212 states have (on average 1.1415094339622642) internal successors, (242), 215 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 07:15:34,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 242 transitions. [2024-11-09 07:15:34,030 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 242 transitions. Word has length 47 [2024-11-09 07:15:34,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:15:34,031 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 242 transitions. [2024-11-09 07:15:34,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.8) internal successors, (126), 44 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:15:34,031 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 242 transitions. [2024-11-09 07:15:34,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-09 07:15:34,032 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:15:34,032 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:15:34,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-09 07:15:34,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-09 07:15:34,233 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:15:34,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:15:34,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1539406623, now seen corresponding path program 9 times [2024-11-09 07:15:34,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:15:34,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521342384] [2024-11-09 07:15:34,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:15:34,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:15:34,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:15:36,216 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:15:36,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:15:36,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521342384] [2024-11-09 07:15:36,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521342384] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:15:36,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420857071] [2024-11-09 07:15:36,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:15:36,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:15:36,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:15:36,218 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:15:36,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-09 07:15:36,435 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:15:36,435 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:15:36,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-11-09 07:15:36,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:15:38,035 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 07:15:38,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-09 07:15:40,556 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:15:40,556 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:15:41,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-09 07:15:41,607 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:15:41,607 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 29 treesize of output 23 [2024-11-09 07:15:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:15:43,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420857071] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:15:43,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1803547689] [2024-11-09 07:15:43,543 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 07:15:43,543 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:15:43,543 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:15:43,543 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:15:43,543 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:15:44,132 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:15:51,193 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16518#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.base|))' at error location [2024-11-09 07:15:51,193 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:15:51,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:15:51,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 19] total 48 [2024-11-09 07:15:51,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813916839] [2024-11-09 07:15:51,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:15:51,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-09 07:15:51,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:15:51,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-09 07:15:51,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=3821, Unknown=0, NotChecked=0, Total=4032 [2024-11-09 07:15:51,196 INFO L87 Difference]: Start difference. First operand 216 states and 242 transitions. Second operand has 49 states, 49 states have (on average 2.5306122448979593) internal successors, (124), 48 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:15:57,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:15:57,725 INFO L93 Difference]: Finished difference Result 283 states and 315 transitions. [2024-11-09 07:15:57,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-09 07:15:57,725 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.5306122448979593) internal successors, (124), 48 states have internal predecessors, (124), 0 states have call successors, (0), 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 48 [2024-11-09 07:15:57,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:15:57,727 INFO L225 Difference]: With dead ends: 283 [2024-11-09 07:15:57,727 INFO L226 Difference]: Without dead ends: 256 [2024-11-09 07:15:57,727 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 92 SyntacticMatches, 7 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=289, Invalid=5411, Unknown=0, NotChecked=0, Total=5700 [2024-11-09 07:15:57,728 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 24 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:15:57,728 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 623 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-11-09 07:15:57,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-11-09 07:15:57,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 236. [2024-11-09 07:15:57,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 232 states have (on average 1.146551724137931) internal successors, (266), 235 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:15:57,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 266 transitions. [2024-11-09 07:15:57,734 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 266 transitions. Word has length 48 [2024-11-09 07:15:57,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:15:57,734 INFO L471 AbstractCegarLoop]: Abstraction has 236 states and 266 transitions. [2024-11-09 07:15:57,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.5306122448979593) internal successors, (124), 48 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:15:57,735 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 266 transitions. [2024-11-09 07:15:57,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-09 07:15:57,736 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:15:57,736 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:15:57,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-09 07:15:57,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-09 07:15:57,937 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:15:57,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:15:57,937 INFO L85 PathProgramCache]: Analyzing trace with hash -623249136, now seen corresponding path program 6 times [2024-11-09 07:15:57,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:15:57,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819312794] [2024-11-09 07:15:57,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:15:57,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:15:57,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:15:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 20 proven. 33 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 07:15:58,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:15:58,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819312794] [2024-11-09 07:15:58,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819312794] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:15:58,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208700137] [2024-11-09 07:15:58,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:15:58,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:15:58,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:15:58,818 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:15:58,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-09 07:15:59,285 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:15:59,285 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:15:59,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-09 07:15:59,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:15:59,305 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 07:16:00,247 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 07:16:00,601 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 07:16:00,992 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 07:16:01,385 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 07:16:01,844 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 07:16:01,845 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:16:02,155 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1267 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1267) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2024-11-09 07:16:02,462 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1267 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1267) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-09 07:16:02,499 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1267 (Array Int Int)) (v_ArrVal_1265 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1265) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1267) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-09 07:16:02,537 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1267 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1267) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-09 07:16:02,588 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:16:02,588 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 07:16:02,628 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:16:02,628 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 07:16:03,492 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 23 not checked. [2024-11-09 07:16:03,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208700137] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:16:03,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [382045019] [2024-11-09 07:16:03,494 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 07:16:03,494 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:16:03,494 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:16:03,494 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:16:03,494 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:16:04,703 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:16:11,830 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17400#(and (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_175| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_174| Int)) (and (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_174|) |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_175|) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_175| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_174| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_180| Int)) (and (= |ULTIMATE.start_cstrlcpy_~n~0#1| |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_180|) (not (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_180| 4294967296) 0)) (exists ((|v_#memory_int_547| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_170| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_181| Int)) (and (<= 1 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 1 |#StackHeapBarrier|) (= |#memory_int| (store |v_#memory_int_547| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_181| (store (select |v_#memory_int_547| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_181|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_170| (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_181|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_170|)))) (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_170|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_175|) (<= (+ |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_170| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_181|)) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_181|) 1) (not (= 0 (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_181|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_170|))) (<= 2 |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_174|) (<= 2 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_181|))))))))' at error location [2024-11-09 07:16:11,830 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:16:11,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:16:11,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 16] total 36 [2024-11-09 07:16:11,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907641757] [2024-11-09 07:16:11,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:16:11,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-09 07:16:11,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:16:11,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-09 07:16:11,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2016, Unknown=34, NotChecked=372, Total=2550 [2024-11-09 07:16:11,832 INFO L87 Difference]: Start difference. First operand 236 states and 266 transitions. Second operand has 36 states, 36 states have (on average 2.861111111111111) internal successors, (103), 36 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:16:19,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:16:19,678 INFO L93 Difference]: Finished difference Result 334 states and 368 transitions. [2024-11-09 07:16:19,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-09 07:16:19,679 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.861111111111111) internal successors, (103), 36 states have internal predecessors, (103), 0 states have call successors, (0), 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 49 [2024-11-09 07:16:19,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:16:19,680 INFO L225 Difference]: With dead ends: 334 [2024-11-09 07:16:19,680 INFO L226 Difference]: Without dead ends: 327 [2024-11-09 07:16:19,681 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 110 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=234, Invalid=4158, Unknown=46, NotChecked=532, Total=4970 [2024-11-09 07:16:19,681 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 27 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 1877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 532 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:16:19,681 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 707 Invalid, 1877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1336 Invalid, 0 Unknown, 532 Unchecked, 4.3s Time] [2024-11-09 07:16:19,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2024-11-09 07:16:19,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 304. [2024-11-09 07:16:19,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 300 states have (on average 1.1233333333333333) internal successors, (337), 303 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:16:19,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 337 transitions. [2024-11-09 07:16:19,690 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 337 transitions. Word has length 49 [2024-11-09 07:16:19,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:16:19,690 INFO L471 AbstractCegarLoop]: Abstraction has 304 states and 337 transitions. [2024-11-09 07:16:19,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.861111111111111) internal successors, (103), 36 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:16:19,691 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 337 transitions. [2024-11-09 07:16:19,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-09 07:16:19,692 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:16:19,692 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:16:19,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-09 07:16:19,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-09 07:16:19,892 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:16:19,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:16:19,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1775335373, now seen corresponding path program 10 times [2024-11-09 07:16:19,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:16:19,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884583474] [2024-11-09 07:16:19,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:16:19,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:16:19,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:16:22,037 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 22 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:16:22,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:16:22,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884583474] [2024-11-09 07:16:22,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884583474] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:16:22,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843991511] [2024-11-09 07:16:22,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 07:16:22,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:16:22,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:16:22,039 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:16:22,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-09 07:16:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:16:22,238 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-09 07:16:22,242 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:16:22,256 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 07:16:23,658 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 35 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:16:23,659 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:16:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 35 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:16:26,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843991511] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:16:26,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [554053175] [2024-11-09 07:16:26,902 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 07:16:26,902 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:16:26,903 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:16:26,903 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:16:26,905 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:16:27,418 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:16:33,924 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18441#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.base|))' at error location [2024-11-09 07:16:33,925 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:16:33,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:16:33,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 41 [2024-11-09 07:16:33,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886499630] [2024-11-09 07:16:33,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:16:33,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-09 07:16:33,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:16:33,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-09 07:16:33,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=3009, Unknown=0, NotChecked=0, Total=3306 [2024-11-09 07:16:33,927 INFO L87 Difference]: Start difference. First operand 304 states and 337 transitions. Second operand has 43 states, 42 states have (on average 3.2142857142857144) internal successors, (135), 42 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 07:16:40,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:16:40,582 INFO L93 Difference]: Finished difference Result 424 states and 463 transitions. [2024-11-09 07:16:40,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 07:16:40,583 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 3.2142857142857144) internal successors, (135), 42 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 51 [2024-11-09 07:16:40,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:16:40,585 INFO L225 Difference]: With dead ends: 424 [2024-11-09 07:16:40,585 INFO L226 Difference]: Without dead ends: 424 [2024-11-09 07:16:40,586 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 105 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=367, Invalid=3793, Unknown=0, NotChecked=0, Total=4160 [2024-11-09 07:16:40,587 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 176 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 1495 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:16:40,587 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 992 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1495 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2024-11-09 07:16:40,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2024-11-09 07:16:40,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 364. [2024-11-09 07:16:40,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 360 states have (on average 1.1222222222222222) internal successors, (404), 363 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:16:40,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 404 transitions. [2024-11-09 07:16:40,599 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 404 transitions. Word has length 51 [2024-11-09 07:16:40,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:16:40,600 INFO L471 AbstractCegarLoop]: Abstraction has 364 states and 404 transitions. [2024-11-09 07:16:40,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 3.2142857142857144) internal successors, (135), 42 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 07:16:40,600 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 404 transitions. [2024-11-09 07:16:40,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-09 07:16:40,601 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:16:40,602 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:16:40,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-09 07:16:40,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2024-11-09 07:16:40,806 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:16:40,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:16:40,807 INFO L85 PathProgramCache]: Analyzing trace with hash 516673229, now seen corresponding path program 7 times [2024-11-09 07:16:40,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:16:40,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945752005] [2024-11-09 07:16:40,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:16:40,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:16:40,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:16:45,952 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:16:45,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:16:45,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945752005] [2024-11-09 07:16:45,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945752005] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:16:45,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917265186] [2024-11-09 07:16:45,953 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 07:16:45,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:16:45,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:16:45,955 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:16:45,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-09 07:16:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:16:46,177 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-09 07:16:46,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:16:46,197 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 07:16:47,622 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 07:16:48,090 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 07:16:48,581 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 07:16:49,098 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 07:16:49,415 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 07:16:49,440 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 33 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 07:16:49,440 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:16:49,835 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1376 (Array Int Int)) (v_ArrVal_1375 (Array Int Int))) (= 0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1375) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1376) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|))) is different from false [2024-11-09 07:16:49,862 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1376 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1376) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2024-11-09 07:16:49,899 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1376 (Array Int Int)) (v_ArrVal_1374 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1374) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1376) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2024-11-09 07:16:49,926 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1376 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1376) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-09 07:16:50,717 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:16:50,717 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 07:16:50,748 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:16:50,748 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 07:16:51,629 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 19 not checked. [2024-11-09 07:16:51,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917265186] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:16:51,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1846883578] [2024-11-09 07:16:51,631 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 07:16:51,631 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:16:51,631 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:16:51,632 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:16:51,632 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:16:57,322 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:17:23,420 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19607#(and (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_258| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_261| Int)) (and (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_261| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_258| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_261|) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_258|) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_261|))) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0))' at error location [2024-11-09 07:17:23,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:17:23,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:17:23,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 17, 17] total 48 [2024-11-09 07:17:23,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898514843] [2024-11-09 07:17:23,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:17:23,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-09 07:17:23,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:17:23,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-09 07:17:23,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=4041, Unknown=59, NotChecked=524, Total=4830 [2024-11-09 07:17:23,423 INFO L87 Difference]: Start difference. First operand 364 states and 404 transitions. Second operand has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 48 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:17:33,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:17:33,967 INFO L93 Difference]: Finished difference Result 372 states and 411 transitions. [2024-11-09 07:17:33,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-09 07:17:33,968 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 48 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2024-11-09 07:17:33,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:17:33,969 INFO L225 Difference]: With dead ends: 372 [2024-11-09 07:17:33,969 INFO L226 Difference]: Without dead ends: 345 [2024-11-09 07:17:33,970 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 38.6s TimeCoverageRelationStatistics Valid=362, Invalid=6899, Unknown=65, NotChecked=684, Total=8010 [2024-11-09 07:17:33,971 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 41 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 302 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-11-09 07:17:33,972 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 911 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1238 Invalid, 0 Unknown, 302 Unchecked, 4.9s Time] [2024-11-09 07:17:33,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2024-11-09 07:17:33,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 324. [2024-11-09 07:17:33,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 320 states have (on average 1.13125) internal successors, (362), 323 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:17:33,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 362 transitions. [2024-11-09 07:17:33,983 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 362 transitions. Word has length 51 [2024-11-09 07:17:33,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:17:33,983 INFO L471 AbstractCegarLoop]: Abstraction has 324 states and 362 transitions. [2024-11-09 07:17:33,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 48 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:17:33,983 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 362 transitions. [2024-11-09 07:17:33,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-09 07:17:33,984 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:17:33,985 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:17:34,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-11-09 07:17:34,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:17:34,185 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:17:34,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:17:34,186 INFO L85 PathProgramCache]: Analyzing trace with hash 365007789, now seen corresponding path program 8 times [2024-11-09 07:17:34,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:17:34,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664954989] [2024-11-09 07:17:34,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:17:34,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:17:34,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:17:37,473 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:17:37,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:17:37,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664954989] [2024-11-09 07:17:37,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664954989] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:17:37,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517810225] [2024-11-09 07:17:37,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:17:37,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:17:37,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:17:37,476 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:17:37,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-09 07:17:37,743 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-09 07:17:37,743 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:17:37,747 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-09 07:17:37,749 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:17:37,773 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 07:17:38,752 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 07:17:39,094 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 07:17:39,409 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 07:17:40,748 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:17:40,748 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:17:41,256 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1428 (Array Int Int)) (v_ArrVal_1427 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1427) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1428) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-09 07:17:41,293 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1428 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1428) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 5 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-09 07:17:41,339 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:17:41,340 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 07:17:41,369 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:17:41,369 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 07:17:41,377 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 07:17:43,287 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2024-11-09 07:17:43,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517810225] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:17:43,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1430184817] [2024-11-09 07:17:43,288 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 07:17:43,288 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:17:43,289 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:17:43,289 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:17:43,289 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:17:48,799 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:18:03,830 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20723#(and (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_274| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_277| Int)) (and (= |ULTIMATE.start_cstrlcpy_~s~0#1.offset| (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_277| 1)) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_277|) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_274| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_274|) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_277|))))' at error location [2024-11-09 07:18:03,830 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:18:03,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:18:03,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 42 [2024-11-09 07:18:03,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765742626] [2024-11-09 07:18:03,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:18:03,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-09 07:18:03,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:18:03,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-09 07:18:03,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=3569, Unknown=20, NotChecked=242, Total=4032 [2024-11-09 07:18:03,832 INFO L87 Difference]: Start difference. First operand 324 states and 362 transitions. Second operand has 43 states, 43 states have (on average 2.744186046511628) internal successors, (118), 42 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 07:18:09,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:18:09,270 INFO L93 Difference]: Finished difference Result 364 states and 401 transitions. [2024-11-09 07:18:09,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 07:18:09,271 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.744186046511628) internal successors, (118), 42 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) Word has length 53 [2024-11-09 07:18:09,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:18:09,272 INFO L225 Difference]: With dead ends: 364 [2024-11-09 07:18:09,272 INFO L226 Difference]: Without dead ends: 335 [2024-11-09 07:18:09,273 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=236, Invalid=4308, Unknown=20, NotChecked=266, Total=4830 [2024-11-09 07:18:09,273 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 10 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 1506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:18:09,273 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 971 Invalid, 1506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1362 Invalid, 0 Unknown, 137 Unchecked, 4.1s Time] [2024-11-09 07:18:09,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2024-11-09 07:18:09,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 320. [2024-11-09 07:18:09,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 316 states have (on average 1.1265822784810127) internal successors, (356), 319 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:18:09,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 356 transitions. [2024-11-09 07:18:09,280 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 356 transitions. Word has length 53 [2024-11-09 07:18:09,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:18:09,280 INFO L471 AbstractCegarLoop]: Abstraction has 320 states and 356 transitions. [2024-11-09 07:18:09,280 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.744186046511628) internal successors, (118), 42 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 07:18:09,281 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 356 transitions. [2024-11-09 07:18:09,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-09 07:18:09,282 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:18:09,282 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:18:09,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-11-09 07:18:09,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:18:09,483 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:18:09,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:18:09,483 INFO L85 PathProgramCache]: Analyzing trace with hash 788861508, now seen corresponding path program 11 times [2024-11-09 07:18:09,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:18:09,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861806726] [2024-11-09 07:18:09,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:18:09,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:18:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:18:12,140 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:18:12,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:18:12,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861806726] [2024-11-09 07:18:12,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861806726] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:18:12,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107159536] [2024-11-09 07:18:12,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:18:12,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:18:12,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:18:12,143 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:18:12,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-09 07:18:12,369 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-09 07:18:12,370 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:18:12,373 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-11-09 07:18:12,375 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:18:12,389 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 18 treesize of output 16 [2024-11-09 07:18:14,172 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 07:18:14,419 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 07:18:14,894 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 7 treesize of output 3 [2024-11-09 07:18:14,903 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 14 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:18:14,903 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:18:15,360 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:18:15,360 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 07:18:15,386 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:18:15,386 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 07:18:16,177 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 14 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:18:16,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107159536] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:18:16,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1131391334] [2024-11-09 07:18:16,178 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 07:18:16,178 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:18:16,179 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:18:16,179 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:18:16,179 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:18:16,658 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:18:23,294 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21798#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.base|))' at error location [2024-11-09 07:18:23,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:18:23,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:18:23,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 37 [2024-11-09 07:18:23,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620993736] [2024-11-09 07:18:23,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:18:23,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-09 07:18:23,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:18:23,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-09 07:18:23,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2596, Unknown=17, NotChecked=0, Total=2756 [2024-11-09 07:18:23,296 INFO L87 Difference]: Start difference. First operand 320 states and 356 transitions. Second operand has 38 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 37 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:18:31,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:18:31,148 INFO L93 Difference]: Finished difference Result 401 states and 444 transitions. [2024-11-09 07:18:31,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-09 07:18:31,149 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 37 states have internal predecessors, (100), 0 states have call successors, (0), 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 54 [2024-11-09 07:18:31,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:18:31,150 INFO L225 Difference]: With dead ends: 401 [2024-11-09 07:18:31,150 INFO L226 Difference]: Without dead ends: 371 [2024-11-09 07:18:31,151 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 124 SyntacticMatches, 7 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=237, Invalid=4574, Unknown=19, NotChecked=0, Total=4830 [2024-11-09 07:18:31,151 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 31 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 1608 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 1618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:18:31,151 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 834 Invalid, 1618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1608 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2024-11-09 07:18:31,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2024-11-09 07:18:31,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 343. [2024-11-09 07:18:31,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 339 states have (on average 1.1327433628318584) internal successors, (384), 342 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:18:31,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 384 transitions. [2024-11-09 07:18:31,158 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 384 transitions. Word has length 54 [2024-11-09 07:18:31,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:18:31,158 INFO L471 AbstractCegarLoop]: Abstraction has 343 states and 384 transitions. [2024-11-09 07:18:31,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.6315789473684212) internal successors, (100), 37 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:18:31,159 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 384 transitions. [2024-11-09 07:18:31,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-09 07:18:31,160 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:18:31,160 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:18:31,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-11-09 07:18:31,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-11-09 07:18:31,361 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:18:31,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:18:31,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1875867850, now seen corresponding path program 7 times [2024-11-09 07:18:31,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:18:31,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983164551] [2024-11-09 07:18:31,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:18:31,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:18:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:18:32,972 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 07:18:32,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:18:32,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983164551] [2024-11-09 07:18:32,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983164551] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:18:32,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127337899] [2024-11-09 07:18:32,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 07:18:32,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:18:32,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:18:32,974 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:18:32,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-09 07:18:33,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:18:33,187 INFO L255 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-09 07:18:33,188 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:18:33,198 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 07:18:34,276 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 07:18:34,276 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:18:36,548 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 07:18:36,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127337899] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:18:36,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [489099007] [2024-11-09 07:18:36,550 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 07:18:36,550 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:18:36,550 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:18:36,550 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:18:36,551 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:18:37,477 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:18:43,463 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22948#(and (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_211| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_209| Int)) (and (= |ULTIMATE.start_cstrlcpy_~s~0#1.offset| (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_211| 1)) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (= |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_209| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_217| Int)) (and (not (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_217| 4294967296) 0)) (exists ((|v_#memory_int_669| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_219| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_204| Int)) (and (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_219|) 1) (<= 1 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= (+ |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_204| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_219|)) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_219|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (= |#memory_int| (store |v_#memory_int_669| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_219| (store (select |v_#memory_int_669| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_219|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_204| (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_219|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_204|)))) (<= 2 |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_209|) (<= 2 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_204|) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_211|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_219|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_204|) 0)))) (= |ULTIMATE.start_cstrlcpy_~n~0#1| |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_217|))) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_209|) |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_211|))) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0))' at error location [2024-11-09 07:18:43,464 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:18:43,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:18:43,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2024-11-09 07:18:43,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459302019] [2024-11-09 07:18:43,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:18:43,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-09 07:18:43,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:18:43,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-09 07:18:43,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2064, Unknown=2, NotChecked=0, Total=2256 [2024-11-09 07:18:43,466 INFO L87 Difference]: Start difference. First operand 343 states and 384 transitions. Second operand has 33 states, 32 states have (on average 3.6875) internal successors, (118), 32 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 07:18:46,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:18:46,760 INFO L93 Difference]: Finished difference Result 407 states and 450 transitions. [2024-11-09 07:18:46,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 07:18:46,761 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.6875) internal successors, (118), 32 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) Word has length 55 [2024-11-09 07:18:46,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:18:46,762 INFO L225 Difference]: With dead ends: 407 [2024-11-09 07:18:46,762 INFO L226 Difference]: Without dead ends: 407 [2024-11-09 07:18:46,762 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=235, Invalid=2519, Unknown=2, NotChecked=0, Total=2756 [2024-11-09 07:18:46,763 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 89 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-09 07:18:46,763 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 596 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-09 07:18:46,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2024-11-09 07:18:46,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 351. [2024-11-09 07:18:46,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 347 states have (on average 1.1325648414985592) internal successors, (393), 350 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 07:18:46,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 393 transitions. [2024-11-09 07:18:46,778 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 393 transitions. Word has length 55 [2024-11-09 07:18:46,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:18:46,779 INFO L471 AbstractCegarLoop]: Abstraction has 351 states and 393 transitions. [2024-11-09 07:18:46,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.6875) internal successors, (118), 32 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 07:18:46,780 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 393 transitions. [2024-11-09 07:18:46,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-09 07:18:46,781 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:18:46,781 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:18:46,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-11-09 07:18:46,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-11-09 07:18:46,982 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:18:46,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:18:46,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1032458355, now seen corresponding path program 9 times [2024-11-09 07:18:46,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:18:46,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371124275] [2024-11-09 07:18:46,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:18:46,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:18:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:18:49,336 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:18:49,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:18:49,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371124275] [2024-11-09 07:18:49,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371124275] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:18:49,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626397566] [2024-11-09 07:18:49,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:18:49,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:18:49,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:18:49,338 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:18:49,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-09 07:18:49,584 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:18:49,584 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:18:49,587 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-09 07:18:49,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:18:49,607 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 07:18:50,891 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 07:18:51,311 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 07:18:51,740 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 07:18:52,008 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 07:18:52,880 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 7 treesize of output 3 [2024-11-09 07:18:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 07:18:53,082 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:18:53,716 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1598 (Array Int Int)) (v_ArrVal_1597 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1597) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1598) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-09 07:18:54,057 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1598 (Array Int Int)) (v_ArrVal_1596 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1596) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1598) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-09 07:18:54,080 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1598 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1598) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-09 07:18:54,114 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:18:54,114 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 07:18:54,140 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:18:54,141 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 07:18:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 6 not checked. [2024-11-09 07:18:54,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626397566] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:18:54,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1743360739] [2024-11-09 07:18:54,935 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 07:18:54,935 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:18:54,935 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:18:54,935 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:18:54,935 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:18:58,487 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:19:19,336 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24099#(and (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_314| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_311| Int)) (and (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_314|) (= |ULTIMATE.start_cstrlcpy_~s~0#1.offset| (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_314| 1)) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_311|) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_314|) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_311| |ULTIMATE.start_cstrlcpy_~s~0#1.base|))))' at error location [2024-11-09 07:19:19,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:19:19,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:19:19,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 43 [2024-11-09 07:19:19,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248735270] [2024-11-09 07:19:19,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:19:19,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-09 07:19:19,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:19:19,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-09 07:19:19,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3563, Unknown=52, NotChecked=366, Total=4160 [2024-11-09 07:19:19,339 INFO L87 Difference]: Start difference. First operand 351 states and 393 transitions. Second operand has 44 states, 44 states have (on average 2.8636363636363638) internal successors, (126), 43 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:19:30,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:19:30,431 INFO L93 Difference]: Finished difference Result 433 states and 476 transitions. [2024-11-09 07:19:30,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-09 07:19:30,432 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.8636363636363638) internal successors, (126), 43 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2024-11-09 07:19:30,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:19:30,433 INFO L225 Difference]: With dead ends: 433 [2024-11-09 07:19:30,433 INFO L226 Difference]: Without dead ends: 405 [2024-11-09 07:19:30,434 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=324, Invalid=6436, Unknown=58, NotChecked=492, Total=7310 [2024-11-09 07:19:30,435 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 36 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 2426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:19:30,435 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 1516 Invalid, 2426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2018 Invalid, 0 Unknown, 393 Unchecked, 6.4s Time] [2024-11-09 07:19:30,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2024-11-09 07:19:30,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 369. [2024-11-09 07:19:30,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 365 states have (on average 1.1342465753424658) internal successors, (414), 368 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:19:30,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 414 transitions. [2024-11-09 07:19:30,442 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 414 transitions. Word has length 55 [2024-11-09 07:19:30,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:19:30,443 INFO L471 AbstractCegarLoop]: Abstraction has 369 states and 414 transitions. [2024-11-09 07:19:30,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.8636363636363638) internal successors, (126), 43 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:19:30,443 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 414 transitions. [2024-11-09 07:19:30,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-09 07:19:30,444 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:19:30,445 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:19:30,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-09 07:19:30,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-11-09 07:19:30,646 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:19:30,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:19:30,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1977638806, now seen corresponding path program 4 times [2024-11-09 07:19:30,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:19:30,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973512047] [2024-11-09 07:19:30,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:19:30,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:19:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:19:31,878 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 07:19:31,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:19:31,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973512047] [2024-11-09 07:19:31,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973512047] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:19:31,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423891345] [2024-11-09 07:19:31,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 07:19:31,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:19:31,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:19:31,880 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:19:31,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-09 07:19:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:19:32,097 INFO L255 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-09 07:19:32,098 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:19:33,343 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 07:19:33,343 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:19:34,719 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 07:19:35,180 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 07:19:35,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423891345] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:19:35,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [250174939] [2024-11-09 07:19:35,182 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 07:19:35,182 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:19:35,182 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:19:35,182 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:19:35,182 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:19:36,085 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:19:41,644 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25326#(and (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_229| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_245| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_245|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_229|) (<= 1 |ULTIMATE.start_cstrlcpy_~d~0#1.offset|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_245|) (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_229|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrlcpy_~d~0#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.base|))))' at error location [2024-11-09 07:19:41,645 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:19:41,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:19:41,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2024-11-09 07:19:41,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380263537] [2024-11-09 07:19:41,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:19:41,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-09 07:19:41,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:19:41,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-09 07:19:41,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1983, Unknown=3, NotChecked=0, Total=2162 [2024-11-09 07:19:41,647 INFO L87 Difference]: Start difference. First operand 369 states and 414 transitions. Second operand has 32 states, 31 states have (on average 3.2580645161290325) internal successors, (101), 32 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 07:19:45,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:19:45,482 INFO L93 Difference]: Finished difference Result 410 states and 451 transitions. [2024-11-09 07:19:45,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 07:19:45,483 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.2580645161290325) internal successors, (101), 32 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) Word has length 56 [2024-11-09 07:19:45,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:19:45,485 INFO L225 Difference]: With dead ends: 410 [2024-11-09 07:19:45,485 INFO L226 Difference]: Without dead ends: 410 [2024-11-09 07:19:45,485 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 130 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=225, Invalid=2528, Unknown=3, NotChecked=0, Total=2756 [2024-11-09 07:19:45,486 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 50 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:19:45,486 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 814 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-11-09 07:19:45,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2024-11-09 07:19:45,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 370. [2024-11-09 07:19:45,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 366 states have (on average 1.1229508196721312) internal successors, (411), 369 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:19:45,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 411 transitions. [2024-11-09 07:19:45,494 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 411 transitions. Word has length 56 [2024-11-09 07:19:45,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:19:45,494 INFO L471 AbstractCegarLoop]: Abstraction has 370 states and 411 transitions. [2024-11-09 07:19:45,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.2580645161290325) internal successors, (101), 32 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 07:19:45,494 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 411 transitions. [2024-11-09 07:19:45,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-09 07:19:45,496 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:19:45,496 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:19:45,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-11-09 07:19:45,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-11-09 07:19:45,697 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:19:45,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:19:45,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1733895216, now seen corresponding path program 12 times [2024-11-09 07:19:45,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:19:45,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001146592] [2024-11-09 07:19:45,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:19:45,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:19:45,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:19:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 35 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:19:47,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:19:47,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001146592] [2024-11-09 07:19:47,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001146592] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:19:47,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037540695] [2024-11-09 07:19:47,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:19:47,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:19:47,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:19:47,512 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:19:47,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-09 07:19:47,785 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:19:47,785 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:19:47,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-09 07:19:47,791 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:19:47,813 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 07:19:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 51 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:19:49,635 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:19:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 51 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:19:53,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037540695] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:19:53,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [82406398] [2024-11-09 07:19:53,425 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 07:19:53,426 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:19:53,426 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:19:53,426 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:19:53,426 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:19:53,982 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:20:00,080 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26515#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.base|))' at error location [2024-11-09 07:20:00,080 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:20:00,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:20:00,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 44 [2024-11-09 07:20:00,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639999300] [2024-11-09 07:20:00,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:20:00,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-09 07:20:00,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:20:00,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-09 07:20:00,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=3308, Unknown=0, NotChecked=0, Total=3660 [2024-11-09 07:20:00,082 INFO L87 Difference]: Start difference. First operand 370 states and 411 transitions. Second operand has 46 states, 45 states have (on average 3.3333333333333335) internal successors, (150), 45 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:20:05,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:20:05,950 INFO L93 Difference]: Finished difference Result 501 states and 549 transitions. [2024-11-09 07:20:05,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 07:20:05,950 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.3333333333333335) internal successors, (150), 45 states have internal predecessors, (150), 0 states have call successors, (0), 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 07:20:05,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:20:05,953 INFO L225 Difference]: With dead ends: 501 [2024-11-09 07:20:05,953 INFO L226 Difference]: Without dead ends: 501 [2024-11-09 07:20:05,954 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 121 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1803 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=434, Invalid=4258, Unknown=0, NotChecked=0, Total=4692 [2024-11-09 07:20:05,954 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 185 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 1552 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-11-09 07:20:05,954 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 926 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1552 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-11-09 07:20:05,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2024-11-09 07:20:05,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 435. [2024-11-09 07:20:05,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 431 states have (on average 1.122969837587007) internal successors, (484), 434 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:20:05,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 484 transitions. [2024-11-09 07:20:05,963 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 484 transitions. Word has length 57 [2024-11-09 07:20:05,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:20:05,964 INFO L471 AbstractCegarLoop]: Abstraction has 435 states and 484 transitions. [2024-11-09 07:20:05,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.3333333333333335) internal successors, (150), 45 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:20:05,964 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 484 transitions. [2024-11-09 07:20:05,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-09 07:20:05,965 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:20:05,965 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:20:05,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-11-09 07:20:06,166 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-11-09 07:20:06,166 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:20:06,166 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:20:06,167 INFO L85 PathProgramCache]: Analyzing trace with hash -5542608, now seen corresponding path program 10 times [2024-11-09 07:20:06,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:20:06,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479709119] [2024-11-09 07:20:06,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:20:06,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:20:06,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:20:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:20:14,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:20:14,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479709119] [2024-11-09 07:20:14,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479709119] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:20:14,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879913643] [2024-11-09 07:20:14,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 07:20:14,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:20:14,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:20:14,537 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:20:14,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-09 07:20:14,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:20:14,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-11-09 07:20:14,765 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:20:14,780 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 07:20:16,575 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 07:20:17,113 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 07:20:17,440 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 07:20:17,780 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 07:20:17,874 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 07:20:17,920 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 07:20:17,921 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:20:18,359 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1778 (Array Int Int)) (v_ArrVal_1777 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1777) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1778) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2024-11-09 07:20:19,502 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1778 (Array Int Int)) (v_ArrVal_1775 (Array Int Int))) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1775) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1778) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 3 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-09 07:20:19,526 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1778 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1778) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 4 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-09 07:20:19,559 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:20:19,559 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 07:20:19,585 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:20:19,586 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 07:20:20,510 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 12 not checked. [2024-11-09 07:20:20,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879913643] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:20:20,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [63122658] [2024-11-09 07:20:20,511 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 07:20:20,512 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:20:20,512 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:20:20,512 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:20:20,512 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:20:26,003 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:20:51,811 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27869#(and (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_343| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_346| Int)) (and (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_346| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_343|) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_346|) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_343| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_346|))))' at error location [2024-11-09 07:20:51,811 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:20:51,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:20:51,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 19, 19] total 50 [2024-11-09 07:20:51,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426371216] [2024-11-09 07:20:51,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:20:51,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-09 07:20:51,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:20:51,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-09 07:20:51,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=4402, Unknown=80, NotChecked=408, Total=5112 [2024-11-09 07:20:51,813 INFO L87 Difference]: Start difference. First operand 435 states and 484 transitions. Second operand has 51 states, 51 states have (on average 2.3137254901960786) internal successors, (118), 50 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 07:21:04,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:21:04,861 INFO L93 Difference]: Finished difference Result 440 states and 488 transitions. [2024-11-09 07:21:04,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-09 07:21:04,862 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.3137254901960786) internal successors, (118), 50 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) Word has length 57 [2024-11-09 07:21:04,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:21:04,863 INFO L225 Difference]: With dead ends: 440 [2024-11-09 07:21:04,863 INFO L226 Difference]: Without dead ends: 410 [2024-11-09 07:21:04,864 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 130 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1637 ImplicationChecksByTransitivity, 41.7s TimeCoverageRelationStatistics Valid=367, Invalid=7393, Unknown=84, NotChecked=528, Total=8372 [2024-11-09 07:21:04,866 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 33 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 1858 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 2119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:21:04,866 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 956 Invalid, 2119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1858 Invalid, 0 Unknown, 256 Unchecked, 6.2s Time] [2024-11-09 07:21:04,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2024-11-09 07:21:04,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2024-11-09 07:21:04,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 404 states have (on average 1.1262376237623761) internal successors, (455), 407 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:21:04,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 455 transitions. [2024-11-09 07:21:04,873 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 455 transitions. Word has length 57 [2024-11-09 07:21:04,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:21:04,874 INFO L471 AbstractCegarLoop]: Abstraction has 408 states and 455 transitions. [2024-11-09 07:21:04,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.3137254901960786) internal successors, (118), 50 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 07:21:04,874 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 455 transitions. [2024-11-09 07:21:04,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-09 07:21:04,877 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:21:04,877 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:21:04,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-11-09 07:21:05,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-11-09 07:21:05,078 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:21:05,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:21:05,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1801184479, now seen corresponding path program 11 times [2024-11-09 07:21:05,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:21:05,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362373205] [2024-11-09 07:21:05,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:21:05,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:21:05,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:21:07,820 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:21:07,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:21:07,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362373205] [2024-11-09 07:21:07,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362373205] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:21:07,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900554634] [2024-11-09 07:21:07,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:21:07,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:21:07,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:21:07,830 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:21:07,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-09 07:21:08,089 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 07:21:08,089 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:21:08,092 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-09 07:21:08,094 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:21:08,113 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 07:21:09,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-09 07:21:10,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2024-11-09 07:21:10,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2024-11-09 07:21:11,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2024-11-09 07:21:17,724 INFO L349 Elim1Store]: treesize reduction 8, result has 87.3 percent of original size [2024-11-09 07:21:17,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 69 [2024-11-09 07:21:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 07:21:19,125 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:21:32,139 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_352| Int) (v_ArrVal_1839 (Array Int Int)) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_354| Int) (v_ArrVal_1838 (Array Int Int)) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_356| Int)) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1838) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1839) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (or (< (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_356| 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_354|) (= (select .cse0 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_354|) 0) (< (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_352| 1) (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (= (select .cse0 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_352|) 0) (< |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_352| 0) (= (select .cse0 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_356|) 0) (< (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_356|) (< (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_354| 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_352|)))) is different from false [2024-11-09 07:21:35,620 WARN L851 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_352| Int) (v_ArrVal_1839 (Array Int Int)) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_354| Int) (v_ArrVal_1837 (Array Int Int)) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_356| Int)) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1837) |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1839) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|))) (or (= (select .cse0 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_352|) 0) (< (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_356| 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_354|) (< (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_356|) (< (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_352| 1) (select |c_#length| |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|)) (< |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_352| 0) (= (select .cse0 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_356|) 0) (< (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_354| 1) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_352|) (= (select .cse0 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_354|) 0)))) is different from false [2024-11-09 07:21:40,981 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:21:40,982 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 64 treesize of output 42 [2024-11-09 07:21:41,168 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:21:41,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 116 [2024-11-09 07:21:41,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 07:21:41,296 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:21:41,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 46 [2024-11-09 07:21:43,781 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 2 proven. 57 refuted. 0 times theorem prover too weak. 14 trivial. 2 not checked. [2024-11-09 07:21:43,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900554634] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:21:43,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [248646431] [2024-11-09 07:21:43,782 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 07:21:43,782 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:21:43,783 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:21:43,783 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:21:43,783 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:21:49,301 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:22:11,175 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29190#(and (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_359| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_362| Int)) (and (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_362| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_362|) (= |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_359| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post6#1.base_359|) |v_ULTIMATE.start_cstrlcpy_#t~post6#1.offset_362|))))' at error location [2024-11-09 07:22:11,175 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:22:11,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:22:11,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 65 [2024-11-09 07:22:11,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902678641] [2024-11-09 07:22:11,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:22:11,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-09 07:22:11,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:22:11,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-09 07:22:11,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=6716, Unknown=37, NotChecked=334, Total=7482 [2024-11-09 07:22:11,177 INFO L87 Difference]: Start difference. First operand 408 states and 455 transitions. Second operand has 66 states, 66 states have (on average 2.3484848484848486) internal successors, (155), 65 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 07:22:19,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:22:25,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:22:28,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:22:37,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:22:42,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:22:46,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 07:23:06,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:23:06,539 INFO L93 Difference]: Finished difference Result 533 states and 579 transitions. [2024-11-09 07:23:06,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-09 07:23:06,540 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.3484848484848486) internal successors, (155), 65 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 58 [2024-11-09 07:23:06,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:23:06,541 INFO L225 Difference]: With dead ends: 533 [2024-11-09 07:23:06,541 INFO L226 Difference]: Without dead ends: 502 [2024-11-09 07:23:06,542 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 2 IntricatePredicates, 2 DeprecatedPredicates, 3611 ImplicationChecksByTransitivity, 86.9s TimeCoverageRelationStatistics Valid=1171, Invalid=16352, Unknown=41, NotChecked=526, Total=18090 [2024-11-09 07:23:06,543 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 74 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 2104 mSolverCounterSat, 14 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 2391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2104 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 21.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:23:06,543 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 1067 Invalid, 2391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2104 Invalid, 5 Unknown, 268 Unchecked, 21.1s Time] [2024-11-09 07:23:06,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2024-11-09 07:23:06,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 386. [2024-11-09 07:23:06,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 382 states have (on average 1.1282722513089005) internal successors, (431), 385 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:23:06,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 431 transitions. [2024-11-09 07:23:06,550 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 431 transitions. Word has length 58 [2024-11-09 07:23:06,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:23:06,550 INFO L471 AbstractCegarLoop]: Abstraction has 386 states and 431 transitions. [2024-11-09 07:23:06,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.3484848484848486) internal successors, (155), 65 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 07:23:06,551 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 431 transitions. [2024-11-09 07:23:06,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-09 07:23:06,552 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:23:06,552 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:23:06,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-11-09 07:23:06,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-11-09 07:23:06,753 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:23:06,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:23:06,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1099241727, now seen corresponding path program 13 times [2024-11-09 07:23:06,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:23:06,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022654208] [2024-11-09 07:23:06,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:23:06,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:23:06,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:23:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 16 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:23:09,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:23:09,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022654208] [2024-11-09 07:23:09,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022654208] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:23:09,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006745936] [2024-11-09 07:23:09,384 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 07:23:09,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:23:09,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:23:09,385 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:23:09,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-09 07:23:09,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:23:09,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-11-09 07:23:09,620 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:23:09,640 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 07:23:11,590 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 07:23:11,858 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 07:23:12,197 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 16 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:23:12,197 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:23:12,727 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:23:12,727 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 07:23:12,767 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:23:12,767 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 07:23:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 16 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:23:13,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006745936] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:23:13,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [226366455] [2024-11-09 07:23:13,605 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 07:23:13,605 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:23:13,605 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:23:13,605 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:23:13,606 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:23:14,131 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:23:21,087 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30619#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 1 |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= 2 |ULTIMATE.start_cstrlcpy_~s~0#1.base|))' at error location [2024-11-09 07:23:21,087 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:23:21,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:23:21,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 38 [2024-11-09 07:23:21,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216452616] [2024-11-09 07:23:21,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:23:21,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-09 07:23:21,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:23:21,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-09 07:23:21,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2689, Unknown=11, NotChecked=0, Total=2862 [2024-11-09 07:23:21,089 INFO L87 Difference]: Start difference. First operand 386 states and 431 transitions. Second operand has 39 states, 39 states have (on average 2.7435897435897436) internal successors, (107), 38 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:23:26,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:23:26,889 INFO L93 Difference]: Finished difference Result 470 states and 522 transitions. [2024-11-09 07:23:26,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-09 07:23:26,889 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.7435897435897436) internal successors, (107), 38 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2024-11-09 07:23:26,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:23:26,891 INFO L225 Difference]: With dead ends: 470 [2024-11-09 07:23:26,891 INFO L226 Difference]: Without dead ends: 437 [2024-11-09 07:23:26,891 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 141 SyntacticMatches, 8 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=202, Invalid=3447, Unknown=11, NotChecked=0, Total=3660 [2024-11-09 07:23:26,892 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 23 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:23:26,892 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 690 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1435 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-11-09 07:23:26,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2024-11-09 07:23:26,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 409. [2024-11-09 07:23:26,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 405 states have (on average 1.1333333333333333) internal successors, (459), 408 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:23:26,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 459 transitions. [2024-11-09 07:23:26,898 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 459 transitions. Word has length 60 [2024-11-09 07:23:26,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:23:26,898 INFO L471 AbstractCegarLoop]: Abstraction has 409 states and 459 transitions. [2024-11-09 07:23:26,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.7435897435897436) internal successors, (107), 38 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:23:26,899 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 459 transitions. [2024-11-09 07:23:26,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-09 07:23:26,900 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:23:26,900 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:23:26,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-11-09 07:23:27,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:23:27,101 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:23:27,101 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:23:27,101 INFO L85 PathProgramCache]: Analyzing trace with hash -924625945, now seen corresponding path program 8 times [2024-11-09 07:23:27,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:23:27,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928328658] [2024-11-09 07:23:27,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:23:27,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:23:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:23:27,957 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 26 proven. 60 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-09 07:23:27,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:23:27,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928328658] [2024-11-09 07:23:27,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928328658] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:23:27,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300063419] [2024-11-09 07:23:27,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:23:27,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:23:27,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:23:27,960 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:23:27,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-09 07:23:28,544 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-09 07:23:28,544 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:23:28,549 INFO L255 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 129 conjuncts are in the unsatisfiable core [2024-11-09 07:23:28,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:23:28,581 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 07:23:31,445 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 07:23:31,999 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 07:23:32,609 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 07:23:33,298 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 07:23:33,882 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 07:23:34,584 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 15 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:23:34,585 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:23:35,047 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1964 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_#t~post3#1.base| v_ArrVal_1964) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|) 0)) is different from false [2024-11-09 07:23:35,071 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1964 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1964) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset| 1)) 0)) is different from false [2024-11-09 07:23:35,432 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1964 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrlcpy_~d~0#1.base| v_ArrVal_1964) |c_ULTIMATE.start_cstrlcpy_~s~0#1.base|) (+ 2 |c_ULTIMATE.start_cstrlcpy_~s~0#1.offset|)) 0)) is different from false [2024-11-09 07:23:36,793 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:23:36,793 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 07:23:36,821 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:23:36,822 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 07:23:36,848 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 07:23:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 15 proven. 50 refuted. 0 times theorem prover too weak. 15 trivial. 29 not checked. [2024-11-09 07:23:39,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300063419] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:23:39,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2049524130] [2024-11-09 07:23:39,260 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-09 07:23:39,260 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:23:39,260 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:23:39,260 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:23:39,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:23:40,107 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:23:48,631 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31939#(and (= |ULTIMATE.start_cstrlcpy_~src#1.offset| 0) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_274| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_272| Int)) (and (= |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_272| |ULTIMATE.start_cstrlcpy_~s~0#1.base|) (= |ULTIMATE.start_cstrlcpy_~d~0#1.offset| (+ |ULTIMATE.start_cstrlcpy_#t~post3#1.offset| 1)) (exists ((|v_ULTIMATE.start_cstrlcpy_#t~pre2#1_277| Int)) (and (exists ((|v_#memory_int_857| (Array Int (Array Int Int))) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_292| Int) (|v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_267| Int)) (and (<= 1 |ULTIMATE.start_cstrlcpy_#t~post3#1.offset|) (<= 1 |#StackHeapBarrier|) (= (select |#valid| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_292|) 1) (<= 2 |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_272|) (<= 1 |ULTIMATE.start_cstrlcpy_~siz#1|) (<= 2 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_292|) (<= 0 |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_267|) (<= 2 |ULTIMATE.start_main_#t~malloc10#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc11#1.base|) (<= 2 |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (= |#memory_int| (store |v_#memory_int_857| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_292| (store (select |v_#memory_int_857| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_292|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_267| (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_292|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_267|)))) (<= (+ |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_267| 1) (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_292|)) (<= 1 |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_274|) (not (= (select (select |#memory_int| |v_ULTIMATE.start_cstrlcpy_#t~post3#1.base_292|) |v_ULTIMATE.start_cstrlcpy_#t~post3#1.offset_267|) 0)))) (= |ULTIMATE.start_cstrlcpy_~n~0#1| |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_277|) (not (= (mod |v_ULTIMATE.start_cstrlcpy_#t~pre2#1_277| 4294967296) 0)))) (= |ULTIMATE.start_cstrlcpy_~d~0#1.base| |ULTIMATE.start_cstrlcpy_#t~post3#1.base|) (= (+ |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_274| 1) |ULTIMATE.start_cstrlcpy_~s~0#1.offset|) (<= (select |#length| |v_ULTIMATE.start_cstrlcpy_#t~post4#1.base_272|) |v_ULTIMATE.start_cstrlcpy_#t~post4#1.offset_274|))))' at error location [2024-11-09 07:23:48,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:23:48,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:23:48,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25, 21] total 58 [2024-11-09 07:23:48,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664028072] [2024-11-09 07:23:48,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:23:48,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-09 07:23:48,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:23:48,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-09 07:23:48,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=4490, Unknown=113, NotChecked=414, Total=5256 [2024-11-09 07:23:48,634 INFO L87 Difference]: Start difference. First operand 409 states and 459 transitions. Second operand has 58 states, 58 states have (on average 2.689655172413793) internal successors, (156), 58 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 07:24:04,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:24:04,865 INFO L93 Difference]: Finished difference Result 566 states and 621 transitions. [2024-11-09 07:24:04,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-09 07:24:04,865 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.689655172413793) internal successors, (156), 58 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) Word has length 60 [2024-11-09 07:24:04,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:24:04,868 INFO L225 Difference]: With dead ends: 566 [2024-11-09 07:24:04,868 INFO L226 Difference]: Without dead ends: 541 [2024-11-09 07:24:04,868 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=368, Invalid=8076, Unknown=124, NotChecked=552, Total=9120 [2024-11-09 07:24:04,869 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 32 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 3355 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1277 SdHoareTripleChecker+Invalid, 3840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 3355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 468 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:24:04,869 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 1277 Invalid, 3840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 3355 Invalid, 0 Unknown, 468 Unchecked, 10.4s Time] [2024-11-09 07:24:04,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2024-11-09 07:24:04,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 460. [2024-11-09 07:24:04,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 456 states have (on average 1.1206140350877194) internal successors, (511), 459 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:24:04,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 511 transitions. [2024-11-09 07:24:04,875 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 511 transitions. Word has length 60 [2024-11-09 07:24:04,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:24:04,875 INFO L471 AbstractCegarLoop]: Abstraction has 460 states and 511 transitions. [2024-11-09 07:24:04,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.689655172413793) internal successors, (156), 58 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 07:24:04,876 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 511 transitions. [2024-11-09 07:24:04,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-09 07:24:04,877 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:24:04,877 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:24:04,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-09 07:24:05,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:24:05,078 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2024-11-09 07:24:05,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:24:05,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1173142047, now seen corresponding path program 12 times [2024-11-09 07:24:05,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:24:05,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006789020] [2024-11-09 07:24:05,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:24:05,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:24:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:24:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:24:08,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:24:08,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006789020] [2024-11-09 07:24:08,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006789020] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:24:08,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028070756] [2024-11-09 07:24:08,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:24:08,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:24:08,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:24:08,641 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:24:08,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea02c5ce-c3a2-482c-8100-16046caeb7bf/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-09 07:24:08,950 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:24:08,950 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:24:08,953 INFO L255 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-11-09 07:24:08,955 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:24:08,968 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 07:24:10,770 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 07:24:11,256 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 07:24:11,537 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 07:24:13,340 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 30 proven. 98 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 07:24:13,340 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:24:14,619 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:24:14,619 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 07:24:14,645 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:24:14,645 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 07:24:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 30 proven. 98 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 07:24:15,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028070756] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:24:15,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [522646113] [2024-11-09 07:24:15,625 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 07:24:15,625 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:24:15,625 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:24:15,625 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:24:15,625 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:24:21,021 INFO L180 IcfgInterpreter]: Interpretation finished