./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/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_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/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_d501cbc4-54a8-441b-8d27-f8579b4edf73/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 4f4570e8b350d1c6ecce62e4659f1c324ac9794563382f5f25c3525057748138 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 04:51:25,654 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 04:51:25,763 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-09 04:51:25,770 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 04:51:25,773 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 04:51:25,817 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 04:51:25,818 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 04:51:25,819 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 04:51:25,820 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 04:51:25,821 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 04:51:25,823 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 04:51:25,824 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 04:51:25,824 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 04:51:25,824 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 04:51:25,828 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 04:51:25,829 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 04:51:25,829 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 04:51:25,830 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 04:51:25,830 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 04:51:25,830 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 04:51:25,830 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 04:51:25,832 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 04:51:25,832 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 04:51:25,833 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 04:51:25,833 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 04:51:25,834 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 04:51:25,834 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 04:51:25,835 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 04:51:25,835 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 04:51:25,835 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 04:51:25,836 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 04:51:25,836 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 04:51:25,837 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 04:51:25,837 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 04:51:25,838 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 04:51:25,838 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 04:51:25,838 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 04:51:25,839 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 04:51:25,839 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 04:51:25,839 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 04:51:25,840 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 04:51:25,841 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:51:25,841 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 04:51:25,841 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 04:51:25,841 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 04:51:25,842 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 04:51:25,842 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 04:51:25,843 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 04:51:25,843 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 04:51:25,843 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_d501cbc4-54a8-441b-8d27-f8579b4edf73/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f4570e8b350d1c6ecce62e4659f1c324ac9794563382f5f25c3525057748138 [2024-11-09 04:51:26,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 04:51:26,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 04:51:26,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 04:51:26,166 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 04:51:26,167 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 04:51:26,168 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i Unable to find full path for "g++" [2024-11-09 04:51:28,214 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 04:51:28,438 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 04:51:28,439 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i [2024-11-09 04:51:28,461 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/data/d60937aac/10270ea9e63c4b46825a12b31e366186/FLAG29a72bf06 [2024-11-09 04:51:28,768 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/data/d60937aac/10270ea9e63c4b46825a12b31e366186 [2024-11-09 04:51:28,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 04:51:28,772 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 04:51:28,773 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 04:51:28,774 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 04:51:28,782 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 04:51:28,783 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:51:28" (1/1) ... [2024-11-09 04:51:28,784 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a0d9ad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:51:28, skipping insertion in model container [2024-11-09 04:51:28,785 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:51:28" (1/1) ... [2024-11-09 04:51:28,842 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 04:51:29,251 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 04:51:29,252 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 04:51:29,258 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:51:29,271 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 04:51:29,338 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:51:29,378 INFO L204 MainTranslator]: Completed translation [2024-11-09 04:51:29,379 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:51:29 WrapperNode [2024-11-09 04:51:29,379 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 04:51:29,380 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 04:51:29,380 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 04:51:29,381 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 04:51:29,387 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:51:29" (1/1) ... [2024-11-09 04:51:29,400 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:51:29" (1/1) ... [2024-11-09 04:51:29,427 INFO L138 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 101 [2024-11-09 04:51:29,428 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 04:51:29,428 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 04:51:29,429 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 04:51:29,429 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 04:51:29,439 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:51:29" (1/1) ... [2024-11-09 04:51:29,440 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:51:29" (1/1) ... [2024-11-09 04:51:29,445 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:51:29" (1/1) ... [2024-11-09 04:51:29,446 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:51:29" (1/1) ... [2024-11-09 04:51:29,456 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:51:29" (1/1) ... [2024-11-09 04:51:29,464 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:51:29" (1/1) ... [2024-11-09 04:51:29,465 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:51:29" (1/1) ... [2024-11-09 04:51:29,469 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:51:29" (1/1) ... [2024-11-09 04:51:29,472 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 04:51:29,476 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 04:51:29,476 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 04:51:29,477 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 04:51:29,477 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:51:29" (1/1) ... [2024-11-09 04:51:29,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:51:29,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:51:29,515 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 04:51:29,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 04:51:29,557 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 04:51:29,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 04:51:29,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 04:51:29,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 04:51:29,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 04:51:29,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 04:51:29,702 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 04:51:29,704 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 04:51:29,971 INFO L? ?]: Removed 70 outVars from TransFormulas that were not future-live. [2024-11-09 04:51:29,971 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 04:51:30,044 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 04:51:30,044 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-09 04:51:30,045 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:51:30 BoogieIcfgContainer [2024-11-09 04:51:30,045 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 04:51:30,047 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 04:51:30,048 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 04:51:30,051 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 04:51:30,051 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 04:51:28" (1/3) ... [2024-11-09 04:51:30,052 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2372ee99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:51:30, skipping insertion in model container [2024-11-09 04:51:30,052 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:51:29" (2/3) ... [2024-11-09 04:51:30,052 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2372ee99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:51:30, skipping insertion in model container [2024-11-09 04:51:30,052 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:51:30" (3/3) ... [2024-11-09 04:51:30,054 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrpbrk-alloca-2.i [2024-11-09 04:51:30,089 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 04:51:30,090 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2024-11-09 04:51:30,158 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 04:51:30,164 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;@7b4a3577, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 04:51:30,164 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-09 04:51:30,168 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 23 states have (on average 2.260869565217391) internal successors, (52), 42 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 04:51:30,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-09 04:51:30,174 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:30,175 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-09 04:51:30,175 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:51:30,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:30,180 INFO L85 PathProgramCache]: Analyzing trace with hash 4726007, now seen corresponding path program 1 times [2024-11-09 04:51:30,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:51:30,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608831787] [2024-11-09 04:51:30,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:30,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:51:30,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:51:30,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:51:30,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608831787] [2024-11-09 04:51:30,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608831787] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:51:30,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:51:30,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 04:51:30,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199150482] [2024-11-09 04:51:30,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:51:30,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:51:30,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:51:30,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:51:30,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:51:30,564 INFO L87 Difference]: Start difference. First operand has 43 states, 23 states have (on average 2.260869565217391) internal successors, (52), 42 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) 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 04:51:30,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:51:30,632 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2024-11-09 04:51:30,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:51:30,635 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 04:51:30,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:51:30,642 INFO L225 Difference]: With dead ends: 41 [2024-11-09 04:51:30,642 INFO L226 Difference]: Without dead ends: 40 [2024-11-09 04:51:30,644 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:51:30,647 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 15 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 49 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 04:51:30,649 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 49 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:51:30,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-09 04:51:30,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-11-09 04:51:30,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 39 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:30,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2024-11-09 04:51:30,680 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 4 [2024-11-09 04:51:30,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:51:30,680 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2024-11-09 04:51:30,681 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 04:51:30,681 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2024-11-09 04:51:30,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-09 04:51:30,681 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:30,682 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-09 04:51:30,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 04:51:30,682 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:51:30,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:30,683 INFO L85 PathProgramCache]: Analyzing trace with hash 4726008, now seen corresponding path program 1 times [2024-11-09 04:51:30,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:51:30,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169641059] [2024-11-09 04:51:30,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:30,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:51:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:31,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:51:31,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:51:31,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169641059] [2024-11-09 04:51:31,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169641059] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:51:31,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:51:31,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:51:31,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189477665] [2024-11-09 04:51:31,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:51:31,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:51:31,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:51:31,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:51:31,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:51:31,104 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:31,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:51:31,273 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2024-11-09 04:51:31,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:51:31,274 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-09 04:51:31,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:51:31,276 INFO L225 Difference]: With dead ends: 43 [2024-11-09 04:51:31,278 INFO L226 Difference]: Without dead ends: 43 [2024-11-09 04:51:31,279 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 04:51:31,280 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:51:31,282 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 105 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:51:31,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-09 04:51:31,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-11-09 04:51:31,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 26 states have (on average 2.0) internal successors, (52), 42 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 04:51:31,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2024-11-09 04:51:31,288 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 4 [2024-11-09 04:51:31,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:51:31,289 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2024-11-09 04:51:31,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:31,289 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2024-11-09 04:51:31,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 04:51:31,290 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:31,290 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 04:51:31,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 04:51:31,291 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:51:31,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:31,291 INFO L85 PathProgramCache]: Analyzing trace with hash 257133414, now seen corresponding path program 1 times [2024-11-09 04:51:31,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:51:31,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120811810] [2024-11-09 04:51:31,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:31,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:51:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:31,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:51:31,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:51:31,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120811810] [2024-11-09 04:51:31,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120811810] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:51:31,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:51:31,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 04:51:31,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471791807] [2024-11-09 04:51:31,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:51:31,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:51:31,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:51:31,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:51:31,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:51:31,382 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:31,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:51:31,436 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2024-11-09 04:51:31,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:51:31,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-09 04:51:31,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:51:31,437 INFO L225 Difference]: With dead ends: 41 [2024-11-09 04:51:31,438 INFO L226 Difference]: Without dead ends: 41 [2024-11-09 04:51:31,438 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:51:31,439 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 11 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:51:31,440 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:51:31,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-09 04:51:31,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-11-09 04:51:31,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 40 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:31,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2024-11-09 04:51:31,444 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 6 [2024-11-09 04:51:31,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:51:31,445 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2024-11-09 04:51:31,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:31,445 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2024-11-09 04:51:31,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 04:51:31,445 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:31,446 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 04:51:31,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 04:51:31,446 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:51:31,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:31,447 INFO L85 PathProgramCache]: Analyzing trace with hash 257133415, now seen corresponding path program 1 times [2024-11-09 04:51:31,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:51:31,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188844917] [2024-11-09 04:51:31,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:31,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:51:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:31,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:51:31,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:51:31,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188844917] [2024-11-09 04:51:31,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188844917] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:51:31,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:51:31,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 04:51:31,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631185451] [2024-11-09 04:51:31,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:51:31,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:51:31,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:51:31,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:51:31,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:51:31,771 INFO L87 Difference]: Start difference. First operand 41 states and 50 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 04:51:31,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:51:31,927 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2024-11-09 04:51:31,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:51:31,928 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 04:51:31,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:51:31,929 INFO L225 Difference]: With dead ends: 44 [2024-11-09 04:51:31,929 INFO L226 Difference]: Without dead ends: 44 [2024-11-09 04:51:31,929 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:51:31,933 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:51:31,934 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 89 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:51:31,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-09 04:51:31,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-11-09 04:51:31,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.896551724137931) internal successors, (55), 43 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 04:51:31,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2024-11-09 04:51:31,941 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 6 [2024-11-09 04:51:31,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:51:31,942 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2024-11-09 04:51:31,942 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 04:51:31,942 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2024-11-09 04:51:31,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 04:51:31,942 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:31,943 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 04:51:31,943 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 04:51:31,943 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:51:31,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:31,944 INFO L85 PathProgramCache]: Analyzing trace with hash 257144242, now seen corresponding path program 1 times [2024-11-09 04:51:31,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:51:31,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753597062] [2024-11-09 04:51:31,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:31,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:51:31,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:32,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:51:32,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:51:32,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753597062] [2024-11-09 04:51:32,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753597062] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:51:32,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:51:32,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 04:51:32,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022605054] [2024-11-09 04:51:32,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:51:32,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:51:32,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:51:32,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:51:32,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:51:32,169 INFO L87 Difference]: Start difference. First operand 44 states and 55 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 04:51:32,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:51:32,251 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2024-11-09 04:51:32,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:51:32,252 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 04:51:32,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:51:32,253 INFO L225 Difference]: With dead ends: 54 [2024-11-09 04:51:32,253 INFO L226 Difference]: Without dead ends: 54 [2024-11-09 04:51:32,253 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:51:32,254 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:51:32,255 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 75 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:51:32,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-09 04:51:32,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2024-11-09 04:51:32,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:32,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 69 transitions. [2024-11-09 04:51:32,264 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 69 transitions. Word has length 6 [2024-11-09 04:51:32,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:51:32,264 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 69 transitions. [2024-11-09 04:51:32,264 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 04:51:32,265 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 69 transitions. [2024-11-09 04:51:32,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 04:51:32,265 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:32,265 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2024-11-09 04:51:32,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 04:51:32,268 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:51:32,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:32,269 INFO L85 PathProgramCache]: Analyzing trace with hash -938716220, now seen corresponding path program 1 times [2024-11-09 04:51:32,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:51:32,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140560936] [2024-11-09 04:51:32,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:32,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:51:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:32,763 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 04:51:32,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:51:32,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140560936] [2024-11-09 04:51:32,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140560936] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:51:32,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231616625] [2024-11-09 04:51:32,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:32,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:51:32,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:51:32,769 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:51:32,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 04:51:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:32,850 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 04:51:32,857 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:51:32,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:51:32,961 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 04:51:32,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 04:51:33,161 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 04:51:33,161 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:51:33,338 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 04:51:33,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231616625] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:51:33,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1899391875] [2024-11-09 04:51:33,368 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2024-11-09 04:51:33,368 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:51:33,372 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:51:33,377 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:51:33,377 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:51:34,307 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:51:34,628 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '563#(exists ((|v_ULTIMATE.start_main_~i~0#1_35| Int) (|v_ULTIMATE.start_main_~nondetString1~0#1.offset_27| Int) (|v_ULTIMATE.start_main_~nondetString1~0#1.base_29| Int)) (and (<= 2 |ULTIMATE.start_main_~nondetString2~0#1.base|) (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_main_~nondetString1~0#1.offset_27| 0) (= |ULTIMATE.start_main_~nondetString2~0#1.offset| 0) (<= 0 |v_ULTIMATE.start_main_~i~0#1_35|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= (select |#length| |v_ULTIMATE.start_main_~nondetString1~0#1.base_29|) |v_ULTIMATE.start_main_~i~0#1_35|) (<= |ULTIMATE.start_main_#t~nondet14#1| 127) (<= 2 |v_ULTIMATE.start_main_~nondetString1~0#1.base_29|) (<= |ULTIMATE.start_main_~length1~0#1| 2147483647) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 2 |ULTIMATE.start_main_~length1~0#1|) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet14#1|))))' at error location [2024-11-09 04:51:34,628 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:51:34,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:51:34,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-09 04:51:34,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497619894] [2024-11-09 04:51:34,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:51:34,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 04:51:34,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:51:34,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 04:51:34,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-09 04:51:34,631 INFO L87 Difference]: Start difference. First operand 53 states and 69 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 04:51:34,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:51:34,924 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2024-11-09 04:51:34,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:51:34,924 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 04:51:34,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:51:34,925 INFO L225 Difference]: With dead ends: 53 [2024-11-09 04:51:34,925 INFO L226 Difference]: Without dead ends: 53 [2024-11-09 04:51:34,925 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-11-09 04:51:34,926 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 3 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:51:34,926 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 180 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:51:34,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-09 04:51:34,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2024-11-09 04:51:34,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 50 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:34,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2024-11-09 04:51:34,934 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 7 [2024-11-09 04:51:34,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:51:34,934 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2024-11-09 04:51:34,934 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 04:51:34,934 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2024-11-09 04:51:34,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 04:51:34,938 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:34,938 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:51:34,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 04:51:35,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 04:51:35,156 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:51:35,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:35,157 INFO L85 PathProgramCache]: Analyzing trace with hash -618463097, now seen corresponding path program 1 times [2024-11-09 04:51:35,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:51:35,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242204783] [2024-11-09 04:51:35,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:35,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:51:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:35,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:51:35,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:51:35,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242204783] [2024-11-09 04:51:35,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242204783] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:51:35,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:51:35,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:51:35,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945357775] [2024-11-09 04:51:35,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:51:35,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:51:35,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:51:35,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:51:35,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:51:35,323 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:35,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:51:35,369 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2024-11-09 04:51:35,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:51:35,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 04:51:35,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:51:35,370 INFO L225 Difference]: With dead ends: 50 [2024-11-09 04:51:35,370 INFO L226 Difference]: Without dead ends: 50 [2024-11-09 04:51:35,370 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:51:35,371 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 20 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:51:35,372 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 45 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:51:35,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-09 04:51:35,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-11-09 04:51:35,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 49 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:35,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2024-11-09 04:51:35,376 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 7 [2024-11-09 04:51:35,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:51:35,376 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2024-11-09 04:51:35,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:35,376 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2024-11-09 04:51:35,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-09 04:51:35,377 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:35,377 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:51:35,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 04:51:35,378 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:51:35,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:35,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1992484809, now seen corresponding path program 1 times [2024-11-09 04:51:35,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:51:35,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595376124] [2024-11-09 04:51:35,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:35,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:51:35,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:35,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:51:35,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:51:35,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595376124] [2024-11-09 04:51:35,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595376124] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:51:35,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:51:35,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:51:35,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341659709] [2024-11-09 04:51:35,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:51:35,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:51:35,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:51:35,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:51:35,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:51:35,418 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:35,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:51:35,471 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2024-11-09 04:51:35,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:51:35,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-09 04:51:35,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:51:35,472 INFO L225 Difference]: With dead ends: 49 [2024-11-09 04:51:35,472 INFO L226 Difference]: Without dead ends: 49 [2024-11-09 04:51:35,472 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:51:35,473 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:51:35,473 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 43 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:51:35,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-09 04:51:35,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2024-11-09 04:51:35,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 47 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:35,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2024-11-09 04:51:35,477 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 8 [2024-11-09 04:51:35,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:51:35,477 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2024-11-09 04:51:35,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:35,478 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2024-11-09 04:51:35,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-09 04:51:35,478 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:35,478 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:51:35,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 04:51:35,478 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:51:35,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:35,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1992484808, now seen corresponding path program 1 times [2024-11-09 04:51:35,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:51:35,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904991966] [2024-11-09 04:51:35,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:35,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:51:35,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:51:35,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:51:35,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904991966] [2024-11-09 04:51:35,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904991966] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:51:35,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:51:35,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:51:35,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006961922] [2024-11-09 04:51:35,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:51:35,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:51:35,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:51:35,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:51:35,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:51:35,557 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:35,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:51:35,619 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2024-11-09 04:51:35,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:51:35,620 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-09 04:51:35,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:51:35,620 INFO L225 Difference]: With dead ends: 65 [2024-11-09 04:51:35,620 INFO L226 Difference]: Without dead ends: 65 [2024-11-09 04:51:35,620 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:51:35,621 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 40 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 59 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 04:51:35,621 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 59 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:51:35,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-09 04:51:35,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2024-11-09 04:51:35,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.675) internal successors, (67), 50 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:35,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2024-11-09 04:51:35,627 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 8 [2024-11-09 04:51:35,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:51:35,627 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2024-11-09 04:51:35,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:35,628 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2024-11-09 04:51:35,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 04:51:35,628 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:35,628 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:51:35,628 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 04:51:35,629 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:51:35,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:35,629 INFO L85 PathProgramCache]: Analyzing trace with hash -152737410, now seen corresponding path program 1 times [2024-11-09 04:51:35,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:51:35,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448025811] [2024-11-09 04:51:35,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:35,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:51:35,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:35,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:51:35,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:51:35,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448025811] [2024-11-09 04:51:35,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448025811] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:51:35,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665300131] [2024-11-09 04:51:35,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:35,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:51:35,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:51:35,904 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:51:35,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 04:51:35,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:35,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 04:51:35,970 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:51:36,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:51:36,015 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 04:51:36,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 04:51:36,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:51:36,134 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:51:36,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:51:36,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665300131] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 04:51:36,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 04:51:36,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 2] total 8 [2024-11-09 04:51:36,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555002007] [2024-11-09 04:51:36,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:51:36,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:51:36,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:51:36,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:51:36,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-09 04:51:36,214 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:36,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:51:36,262 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2024-11-09 04:51:36,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:51:36,263 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-09 04:51:36,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:51:36,263 INFO L225 Difference]: With dead ends: 50 [2024-11-09 04:51:36,263 INFO L226 Difference]: Without dead ends: 50 [2024-11-09 04:51:36,263 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-11-09 04:51:36,264 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:51:36,264 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 55 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:51:36,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-09 04:51:36,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2024-11-09 04:51:36,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.6774193548387097) 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 04:51:36,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2024-11-09 04:51:36,269 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 9 [2024-11-09 04:51:36,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:51:36,269 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2024-11-09 04:51:36,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:36,269 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2024-11-09 04:51:36,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 04:51:36,269 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:36,270 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-09 04:51:36,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 04:51:36,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:51:36,470 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:51:36,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:36,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1957938727, now seen corresponding path program 1 times [2024-11-09 04:51:36,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:51:36,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397251713] [2024-11-09 04:51:36,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:36,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:51:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:36,696 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 04:51:36,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:51:36,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397251713] [2024-11-09 04:51:36,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397251713] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:51:36,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149360562] [2024-11-09 04:51:36,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:36,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:51:36,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:51:36,698 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:51:36,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 04:51:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:36,764 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 04:51:36,766 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:51:36,794 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 04:51:36,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:51:36,803 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 04:51:36,972 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 04:51:36,972 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:51:37,207 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 04:51:37,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149360562] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:51:37,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1263523964] [2024-11-09 04:51:37,209 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2024-11-09 04:51:37,210 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:51:37,210 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:51:37,210 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:51:37,211 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:51:37,777 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:51:38,445 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1216#(and (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet16#1|)) (<= |ULTIMATE.start_main_#t~nondet16#1| 127) (exists ((|v_ULTIMATE.start_main_~nondetString2~0#1.base_29| Int) (|v_ULTIMATE.start_main_~i~1#1_33| Int)) (and (<= 0 |v_ULTIMATE.start_main_~i~1#1_33|) (<= (select |#length| |v_ULTIMATE.start_main_~nondetString2~0#1.base_29|) |v_ULTIMATE.start_main_~i~1#1_33|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~length1~0#1| 1) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |v_ULTIMATE.start_main_~nondetString2~0#1.base_29|) (<= (+ |v_ULTIMATE.start_main_~i~1#1_33| 2) |ULTIMATE.start_main_~length2~0#1|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|) (<= 2 |ULTIMATE.start_main_~nondetString1~0#1.base|) (<= |ULTIMATE.start_main_~length2~0#1| 2147483647))) (= |ULTIMATE.start_main_~nondetString1~0#1.offset| 0))' at error location [2024-11-09 04:51:38,445 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:51:38,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:51:38,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2024-11-09 04:51:38,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889587445] [2024-11-09 04:51:38,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:51:38,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 04:51:38,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:51:38,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 04:51:38,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-11-09 04:51:38,447 INFO L87 Difference]: Start difference. First operand 41 states and 52 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 04:51:38,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:51:38,644 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2024-11-09 04:51:38,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 04:51:38,645 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 04:51:38,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:51:38,645 INFO L225 Difference]: With dead ends: 41 [2024-11-09 04:51:38,646 INFO L226 Difference]: Without dead ends: 41 [2024-11-09 04:51:38,646 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2024-11-09 04:51:38,647 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 12 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:51:38,647 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 91 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:51:38,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-09 04:51:38,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2024-11-09 04:51:38,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 38 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 04:51:38,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2024-11-09 04:51:38,650 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 9 [2024-11-09 04:51:38,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:51:38,650 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2024-11-09 04:51:38,650 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 04:51:38,650 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2024-11-09 04:51:38,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 04:51:38,651 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:38,651 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:51:38,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 04:51:38,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:51:38,855 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:51:38,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:38,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1666875807, now seen corresponding path program 1 times [2024-11-09 04:51:38,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:51:38,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781030867] [2024-11-09 04:51:38,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:38,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:51:38,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:38,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:51:38,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:51:38,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781030867] [2024-11-09 04:51:38,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781030867] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:51:38,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:51:38,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:51:38,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268577037] [2024-11-09 04:51:38,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:51:38,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:51:38,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:51:38,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:51:38,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:51:38,922 INFO L87 Difference]: Start difference. First operand 39 states and 49 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 04:51:38,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:51:38,966 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2024-11-09 04:51:38,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:51:38,966 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 04:51:38,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:51:38,966 INFO L225 Difference]: With dead ends: 36 [2024-11-09 04:51:38,967 INFO L226 Difference]: Without dead ends: 36 [2024-11-09 04:51:38,967 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:51:38,967 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 24 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:51:38,968 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 46 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:51:38,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-09 04:51:38,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-11-09 04:51:38,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 35 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:38,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2024-11-09 04:51:38,970 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 11 [2024-11-09 04:51:38,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:51:38,970 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2024-11-09 04:51:38,970 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 04:51:38,970 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2024-11-09 04:51:38,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 04:51:38,971 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:38,971 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:51:38,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 04:51:38,971 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:51:38,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:38,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1666875806, now seen corresponding path program 1 times [2024-11-09 04:51:38,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:51:38,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852035594] [2024-11-09 04:51:38,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:38,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:51:38,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:51:39,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:51:39,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852035594] [2024-11-09 04:51:39,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852035594] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:51:39,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:51:39,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:51:39,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106529689] [2024-11-09 04:51:39,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:51:39,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:51:39,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:51:39,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:51:39,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:51:39,086 INFO L87 Difference]: Start difference. First operand 36 states and 46 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 04:51:39,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:51:39,149 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2024-11-09 04:51:39,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:51:39,149 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 04:51:39,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:51:39,150 INFO L225 Difference]: With dead ends: 41 [2024-11-09 04:51:39,150 INFO L226 Difference]: Without dead ends: 41 [2024-11-09 04:51:39,150 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:51:39,151 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 39 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:51:39,151 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 58 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:51:39,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-09 04:51:39,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-11-09 04:51:39,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.5142857142857142) 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 04:51:39,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2024-11-09 04:51:39,153 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 11 [2024-11-09 04:51:39,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:51:39,153 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2024-11-09 04:51:39,153 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 04:51:39,154 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2024-11-09 04:51:39,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-09 04:51:39,154 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:39,154 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:51:39,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-09 04:51:39,154 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:51:39,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:39,155 INFO L85 PathProgramCache]: Analyzing trace with hash -133612413, now seen corresponding path program 1 times [2024-11-09 04:51:39,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:51:39,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691541103] [2024-11-09 04:51:39,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:39,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:51:39,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:39,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:51:39,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:51:39,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691541103] [2024-11-09 04:51:39,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691541103] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:51:39,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:51:39,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 04:51:39,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095198943] [2024-11-09 04:51:39,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:51:39,266 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:51:39,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:51:39,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:51:39,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:51:39,267 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), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:39,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:51:39,296 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2024-11-09 04:51:39,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:51:39,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-11-09 04:51:39,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:51:39,297 INFO L225 Difference]: With dead ends: 40 [2024-11-09 04:51:39,297 INFO L226 Difference]: Without dead ends: 37 [2024-11-09 04:51:39,297 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:51:39,298 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 24 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:51:39,298 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 48 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:51:39,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-09 04:51:39,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-11-09 04:51:39,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.46875) internal successors, (47), 36 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:39,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2024-11-09 04:51:39,300 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 12 [2024-11-09 04:51:39,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:51:39,301 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2024-11-09 04:51:39,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:39,301 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2024-11-09 04:51:39,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-09 04:51:39,302 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:39,302 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:51:39,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-09 04:51:39,302 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:51:39,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:39,303 INFO L85 PathProgramCache]: Analyzing trace with hash 516137177, now seen corresponding path program 1 times [2024-11-09 04:51:39,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:51:39,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157299432] [2024-11-09 04:51:39,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:39,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:51:39,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:39,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:51:39,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:51:39,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157299432] [2024-11-09 04:51:39,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157299432] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:51:39,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:51:39,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:51:39,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578415973] [2024-11-09 04:51:39,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:51:39,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:51:39,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:51:39,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:51:39,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:51:39,338 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 04:51:39,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:51:39,357 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2024-11-09 04:51:39,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:51:39,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 14 [2024-11-09 04:51:39,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:51:39,358 INFO L225 Difference]: With dead ends: 39 [2024-11-09 04:51:39,358 INFO L226 Difference]: Without dead ends: 39 [2024-11-09 04:51:39,359 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:51:39,360 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:51:39,360 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 04:51:39,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-09 04:51:39,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-09 04:51:39,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 38 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 04:51:39,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2024-11-09 04:51:39,365 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 14 [2024-11-09 04:51:39,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:51:39,365 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2024-11-09 04:51:39,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 04:51:39,365 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2024-11-09 04:51:39,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 04:51:39,366 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:39,366 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:51:39,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-09 04:51:39,366 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:51:39,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:39,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1179767001, now seen corresponding path program 1 times [2024-11-09 04:51:39,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:51:39,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991595898] [2024-11-09 04:51:39,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:39,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:51:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:39,649 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 04:51:39,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:51:39,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991595898] [2024-11-09 04:51:39,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991595898] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:51:39,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:51:39,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 04:51:39,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898287752] [2024-11-09 04:51:39,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:51:39,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 04:51:39,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:51:39,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 04:51:39,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:51:39,651 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:39,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:51:39,757 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2024-11-09 04:51:39,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 04:51:39,757 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-09 04:51:39,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:51:39,758 INFO L225 Difference]: With dead ends: 51 [2024-11-09 04:51:39,758 INFO L226 Difference]: Without dead ends: 40 [2024-11-09 04:51:39,758 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-09 04:51:39,759 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:51:39,759 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 101 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:51:39,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-09 04:51:39,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2024-11-09 04:51:39,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.393939393939394) internal successors, (46), 37 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:39,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2024-11-09 04:51:39,761 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 15 [2024-11-09 04:51:39,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:51:39,761 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2024-11-09 04:51:39,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:39,761 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2024-11-09 04:51:39,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-09 04:51:39,762 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:39,762 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:51:39,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-09 04:51:39,762 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:51:39,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:39,763 INFO L85 PathProgramCache]: Analyzing trace with hash -908328741, now seen corresponding path program 1 times [2024-11-09 04:51:39,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:51:39,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913355006] [2024-11-09 04:51:39,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:39,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:51:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:39,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:51:39,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:51:39,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913355006] [2024-11-09 04:51:39,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913355006] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:51:39,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:51:39,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-09 04:51:39,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265436063] [2024-11-09 04:51:39,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:51:39,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 04:51:39,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:51:39,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 04:51:39,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-09 04:51:39,969 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 04:51:40,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:51:40,077 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2024-11-09 04:51:40,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 04:51:40,078 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 04:51:40,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:51:40,078 INFO L225 Difference]: With dead ends: 55 [2024-11-09 04:51:40,078 INFO L226 Difference]: Without dead ends: 55 [2024-11-09 04:51:40,079 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-09 04:51:40,079 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:51:40,080 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 84 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:51:40,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-09 04:51:40,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2024-11-09 04:51:40,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 51 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 04:51:40,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2024-11-09 04:51:40,082 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 18 [2024-11-09 04:51:40,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:51:40,082 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2024-11-09 04:51:40,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 04:51:40,083 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2024-11-09 04:51:40,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 04:51:40,083 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:40,083 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:51:40,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-09 04:51:40,084 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:51:40,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:40,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1911202449, now seen corresponding path program 1 times [2024-11-09 04:51:40,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:51:40,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214021986] [2024-11-09 04:51:40,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:40,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:51:40,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:40,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:51:40,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:51:40,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214021986] [2024-11-09 04:51:40,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214021986] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:51:40,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:51:40,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 04:51:40,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525312106] [2024-11-09 04:51:40,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:51:40,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 04:51:40,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:51:40,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 04:51:40,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-09 04:51:40,186 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:40,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:51:40,294 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2024-11-09 04:51:40,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 04:51:40,295 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-09 04:51:40,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:51:40,296 INFO L225 Difference]: With dead ends: 52 [2024-11-09 04:51:40,296 INFO L226 Difference]: Without dead ends: 38 [2024-11-09 04:51:40,296 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-09 04:51:40,297 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 27 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:51:40,297 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 76 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:51:40,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-09 04:51:40,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2024-11-09 04:51:40,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.3125) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:40,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2024-11-09 04:51:40,299 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 19 [2024-11-09 04:51:40,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:51:40,299 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2024-11-09 04:51:40,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:40,299 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2024-11-09 04:51:40,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-09 04:51:40,300 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:40,300 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:51:40,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-09 04:51:40,300 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:51:40,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:40,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1403780415, now seen corresponding path program 1 times [2024-11-09 04:51:40,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:51:40,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834391044] [2024-11-09 04:51:40,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:40,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:51:40,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:40,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:51:40,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:51:40,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834391044] [2024-11-09 04:51:40,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834391044] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:51:40,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741525658] [2024-11-09 04:51:40,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:40,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:51:40,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:51:40,579 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:51:40,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 04:51:40,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:40,691 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 04:51:40,695 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:51:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:51:40,839 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:51:40,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-09 04:51:41,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:51:41,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741525658] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:51:41,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1702237382] [2024-11-09 04:51:41,042 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:51:41,043 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:51:41,043 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:51:41,043 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:51:41,044 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:51:41,945 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:51:43,137 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2099#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:51:43,138 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:51:43,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:51:43,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2024-11-09 04:51:43,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42260940] [2024-11-09 04:51:43,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:51:43,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 04:51:43,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:51:43,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 04:51:43,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 04:51:43,140 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 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 04:51:43,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:51:43,330 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2024-11-09 04:51:43,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 04:51:43,331 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 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) Word has length 21 [2024-11-09 04:51:43,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:51:43,331 INFO L225 Difference]: With dead ends: 44 [2024-11-09 04:51:43,332 INFO L226 Difference]: Without dead ends: 40 [2024-11-09 04:51:43,332 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=211, Invalid=1349, Unknown=0, NotChecked=0, Total=1560 [2024-11-09 04:51:43,333 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 106 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:51:43,333 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 78 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:51:43,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-09 04:51:43,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2024-11-09 04:51:43,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:43,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-11-09 04:51:43,335 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 21 [2024-11-09 04:51:43,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:51:43,336 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-11-09 04:51:43,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 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 04:51:43,336 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-11-09 04:51:43,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-09 04:51:43,337 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:43,337 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:51:43,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 04:51:43,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:51:43,541 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:51:43,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:43,541 INFO L85 PathProgramCache]: Analyzing trace with hash -413284947, now seen corresponding path program 1 times [2024-11-09 04:51:43,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:51:43,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441401828] [2024-11-09 04:51:43,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:43,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:51:43,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:43,728 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:51:43,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:51:43,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441401828] [2024-11-09 04:51:43,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441401828] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:51:43,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660007792] [2024-11-09 04:51:43,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:43,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:51:43,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:51:43,731 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:51:43,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 04:51:43,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:43,822 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 04:51:43,824 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:51:43,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:51:43,950 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:51:44,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-09 04:51:44,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:51:44,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660007792] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:51:44,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1784816609] [2024-11-09 04:51:44,104 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 04:51:44,106 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:51:44,106 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:51:44,107 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:51:44,107 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:51:45,014 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:51:46,019 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2349#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:51:46,019 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:51:46,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:51:46,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2024-11-09 04:51:46,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694237189] [2024-11-09 04:51:46,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:51:46,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 04:51:46,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:51:46,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 04:51:46,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 04:51:46,022 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 17 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:46,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:51:46,146 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2024-11-09 04:51:46,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 04:51:46,147 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-09 04:51:46,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:51:46,147 INFO L225 Difference]: With dead ends: 61 [2024-11-09 04:51:46,147 INFO L226 Difference]: Without dead ends: 61 [2024-11-09 04:51:46,148 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=146, Invalid=1044, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 04:51:46,148 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:51:46,149 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 85 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:51:46,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-09 04:51:46,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 44. [2024-11-09 04:51:46,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 43 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 04:51:46,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2024-11-09 04:51:46,153 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 23 [2024-11-09 04:51:46,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:51:46,153 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2024-11-09 04:51:46,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:46,154 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2024-11-09 04:51:46,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 04:51:46,154 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:46,155 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:51:46,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 04:51:46,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:51:46,359 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:51:46,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:46,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1951044602, now seen corresponding path program 2 times [2024-11-09 04:51:46,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:51:46,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784961354] [2024-11-09 04:51:46,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:46,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:51:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:46,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:51:46,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:51:46,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784961354] [2024-11-09 04:51:46,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784961354] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:51:46,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506007335] [2024-11-09 04:51:46,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:51:46,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:51:46,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:51:46,846 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:51:46,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 04:51:46,973 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 04:51:46,973 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:51:46,975 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-09 04:51:46,976 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:51:47,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 04:51:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:51:47,088 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:51:47,107 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 04:51:47,110 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 04:51:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:51:47,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506007335] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:51:47,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [703327323] [2024-11-09 04:51:47,166 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:51:47,166 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:51:47,167 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:51:47,167 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:51:47,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:51:47,996 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:51:48,981 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2636#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:51:48,981 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:51:48,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:51:48,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2024-11-09 04:51:48,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869972352] [2024-11-09 04:51:48,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:51:48,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 04:51:48,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:51:48,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 04:51:48,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 04:51:48,983 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 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 04:51:49,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:51:49,199 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2024-11-09 04:51:49,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 04:51:49,199 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 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) Word has length 25 [2024-11-09 04:51:49,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:51:49,200 INFO L225 Difference]: With dead ends: 76 [2024-11-09 04:51:49,200 INFO L226 Difference]: Without dead ends: 72 [2024-11-09 04:51:49,200 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=161, Invalid=1399, Unknown=0, NotChecked=0, Total=1560 [2024-11-09 04:51:49,201 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:51:49,201 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 130 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:51:49,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-09 04:51:49,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2024-11-09 04:51:49,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 67 states have (on average 1.164179104477612) 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 04:51:49,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2024-11-09 04:51:49,204 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 25 [2024-11-09 04:51:49,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:51:49,204 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2024-11-09 04:51:49,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 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 04:51:49,204 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2024-11-09 04:51:49,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-09 04:51:49,205 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:49,205 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:51:49,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 04:51:49,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-09 04:51:49,406 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:51:49,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:49,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1481073824, now seen corresponding path program 3 times [2024-11-09 04:51:49,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:51:49,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099178920] [2024-11-09 04:51:49,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:49,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:51:49,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:51:49,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:51:49,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099178920] [2024-11-09 04:51:49,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099178920] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:51:49,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800672561] [2024-11-09 04:51:49,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:51:49,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:51:49,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:51:49,817 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:51:49,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 04:51:49,913 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:51:49,913 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:51:49,914 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-09 04:51:49,917 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:51:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:51:50,059 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:51:50,239 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 04:51:50,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:51:50,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800672561] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:51:50,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1350254034] [2024-11-09 04:51:50,303 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:51:50,303 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:51:50,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:51:50,304 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:51:50,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:51:51,025 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:51:52,039 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2990#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:51:52,039 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:51:52,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:51:52,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2024-11-09 04:51:52,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679921303] [2024-11-09 04:51:52,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:51:52,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 04:51:52,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:51:52,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 04:51:52,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1200, Unknown=0, NotChecked=0, Total=1332 [2024-11-09 04:51:52,041 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:52,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:51:52,386 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2024-11-09 04:51:52,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 04:51:52,387 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-09 04:51:52,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:51:52,387 INFO L225 Difference]: With dead ends: 90 [2024-11-09 04:51:52,388 INFO L226 Difference]: Without dead ends: 90 [2024-11-09 04:51:52,388 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=176, Invalid=1546, Unknown=0, NotChecked=0, Total=1722 [2024-11-09 04:51:52,389 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 49 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:51:52,389 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 185 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:51:52,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-09 04:51:52,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2024-11-09 04:51:52,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 76 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:52,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2024-11-09 04:51:52,392 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 28 [2024-11-09 04:51:52,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:51:52,393 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2024-11-09 04:51:52,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.2) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:52,393 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2024-11-09 04:51:52,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-09 04:51:52,394 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:52,394 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:51:52,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 04:51:52,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-09 04:51:52,598 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:51:52,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:52,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1680958171, now seen corresponding path program 4 times [2024-11-09 04:51:52,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:51:52,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454999243] [2024-11-09 04:51:52,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:52,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:51:52,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:53,780 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:51:53,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:51:53,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454999243] [2024-11-09 04:51:53,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454999243] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:51:53,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908564769] [2024-11-09 04:51:53,781 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:51:53,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:51:53,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:51:53,782 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:51:53,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 04:51:53,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:53,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-09 04:51:53,886 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:51:54,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 04:51:54,115 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:51:54,115 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:51:54,142 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 04:51:54,144 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 04:51:54,219 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:51:54,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908564769] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:51:54,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1071787997] [2024-11-09 04:51:54,222 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:51:54,222 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:51:54,223 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:51:54,223 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:51:54,223 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:51:54,974 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:51:56,182 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3395#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:51:56,182 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:51:56,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:51:56,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 26 [2024-11-09 04:51:56,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688823415] [2024-11-09 04:51:56,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:51:56,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 04:51:56,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:51:56,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 04:51:56,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1597, Unknown=0, NotChecked=0, Total=1722 [2024-11-09 04:51:56,184 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:57,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:51:57,120 INFO L93 Difference]: Finished difference Result 122 states and 137 transitions. [2024-11-09 04:51:57,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 04:51:57,120 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-09 04:51:57,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:51:57,121 INFO L225 Difference]: With dead ends: 122 [2024-11-09 04:51:57,121 INFO L226 Difference]: Without dead ends: 118 [2024-11-09 04:51:57,122 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=219, Invalid=2751, Unknown=0, NotChecked=0, Total=2970 [2024-11-09 04:51:57,123 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 66 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:51:57,123 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 239 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:51:57,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-09 04:51:57,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 110. [2024-11-09 04:51:57,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 108 states have (on average 1.1574074074074074) internal successors, (125), 109 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:57,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2024-11-09 04:51:57,127 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 32 [2024-11-09 04:51:57,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:51:57,127 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2024-11-09 04:51:57,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:51:57,127 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2024-11-09 04:51:57,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-09 04:51:57,128 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:51:57,128 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:51:57,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 04:51:57,328 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-09 04:51:57,329 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:51:57,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:51:57,329 INFO L85 PathProgramCache]: Analyzing trace with hash -742320450, now seen corresponding path program 2 times [2024-11-09 04:51:57,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:51:57,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635894479] [2024-11-09 04:51:57,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:51:57,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:51:57,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:51:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:51:57,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:51:57,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635894479] [2024-11-09 04:51:57,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635894479] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:51:57,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099243281] [2024-11-09 04:51:57,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:51:57,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:51:57,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:51:57,943 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:51:57,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 04:51:58,049 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 04:51:58,049 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:51:58,051 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-09 04:51:58,055 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:51:58,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-09 04:51:58,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-09 04:51:58,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-09 04:51:58,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2024-11-09 04:51:58,766 INFO L349 Elim1Store]: treesize reduction 4, result has 90.2 percent of original size [2024-11-09 04:51:58,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 50 [2024-11-09 04:51:58,919 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 04:51:58,920 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:51:59,671 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:51:59,671 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 62 treesize of output 40 [2024-11-09 04:51:59,702 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:51:59,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 114 [2024-11-09 04:51:59,740 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:51:59,740 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 64 treesize of output 62 [2024-11-09 04:52:00,101 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:00,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099243281] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:52:00,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [632137528] [2024-11-09 04:52:00,103 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2024-11-09 04:52:00,104 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:52:00,104 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:52:00,104 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:52:00,104 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:52:00,878 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:52:02,374 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3892#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:52:02,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:52:02,375 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:52:02,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 35 [2024-11-09 04:52:02,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940186624] [2024-11-09 04:52:02,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:52:02,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-09 04:52:02,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:52:02,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-09 04:52:02,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2551, Unknown=4, NotChecked=0, Total=2756 [2024-11-09 04:52:02,377 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:52:04,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:52:04,232 INFO L93 Difference]: Finished difference Result 225 states and 246 transitions. [2024-11-09 04:52:04,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-09 04:52:04,233 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 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 32 [2024-11-09 04:52:04,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:52:04,233 INFO L225 Difference]: With dead ends: 225 [2024-11-09 04:52:04,234 INFO L226 Difference]: Without dead ends: 117 [2024-11-09 04:52:04,235 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=504, Invalid=4894, Unknown=4, NotChecked=0, Total=5402 [2024-11-09 04:52:04,236 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 93 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 04:52:04,236 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 191 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 04:52:04,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-09 04:52:04,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 71. [2024-11-09 04:52:04,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1285714285714286) internal successors, (79), 70 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 04:52:04,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2024-11-09 04:52:04,242 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 32 [2024-11-09 04:52:04,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:52:04,243 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2024-11-09 04:52:04,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:52:04,243 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2024-11-09 04:52:04,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 04:52:04,243 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:52:04,244 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:52:04,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 04:52:04,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-09 04:52:04,449 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:52:04,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:52:04,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1657951371, now seen corresponding path program 5 times [2024-11-09 04:52:04,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:52:04,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810730011] [2024-11-09 04:52:04,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:52:04,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:52:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:52:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:04,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:52:04,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810730011] [2024-11-09 04:52:04,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810730011] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:52:04,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148806434] [2024-11-09 04:52:04,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:52:04,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:52:04,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:52:04,903 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:52:04,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 04:52:05,011 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-09 04:52:05,011 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:52:05,013 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-09 04:52:05,015 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:52:05,191 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:05,191 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:52:05,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-09 04:52:05,442 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:05,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148806434] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:52:05,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1911675661] [2024-11-09 04:52:05,444 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:52:05,444 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:52:05,445 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:52:05,445 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:52:05,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:52:06,117 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:52:07,181 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4479#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:52:07,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:52:07,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:52:07,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2024-11-09 04:52:07,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331729107] [2024-11-09 04:52:07,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:52:07,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 04:52:07,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:52:07,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 04:52:07,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1712, Unknown=0, NotChecked=0, Total=1892 [2024-11-09 04:52:07,183 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 28 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 28 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:52:07,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:52:07,501 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2024-11-09 04:52:07,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 04:52:07,502 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 28 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-09 04:52:07,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:52:07,502 INFO L225 Difference]: With dead ends: 82 [2024-11-09 04:52:07,502 INFO L226 Difference]: Without dead ends: 82 [2024-11-09 04:52:07,503 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 67 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=249, Invalid=2201, Unknown=0, NotChecked=0, Total=2450 [2024-11-09 04:52:07,503 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 51 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:52:07,504 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 134 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:52:07,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-09 04:52:07,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2024-11-09 04:52:07,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.135135135135135) internal successors, (84), 74 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:52:07,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2024-11-09 04:52:07,506 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 35 [2024-11-09 04:52:07,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:52:07,507 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2024-11-09 04:52:07,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 28 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:52:07,507 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2024-11-09 04:52:07,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 04:52:07,507 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:52:07,507 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:52:07,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 04:52:07,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-09 04:52:07,708 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:52:07,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:52:07,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1405208784, now seen corresponding path program 6 times [2024-11-09 04:52:07,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:52:07,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029150391] [2024-11-09 04:52:07,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:52:07,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:52:07,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:52:08,183 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:08,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:52:08,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029150391] [2024-11-09 04:52:08,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029150391] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:52:08,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161493242] [2024-11-09 04:52:08,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:52:08,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:52:08,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:52:08,186 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:52:08,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 04:52:08,287 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:52:08,288 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:52:08,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-09 04:52:08,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:52:08,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 04:52:08,470 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:08,470 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:52:08,504 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 04:52:08,506 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 04:52:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:08,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161493242] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:52:08,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1815080656] [2024-11-09 04:52:08,578 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:52:08,579 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:52:08,579 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:52:08,579 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:52:08,579 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:52:09,296 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:52:10,467 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4917#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:52:10,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:52:10,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:52:10,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 25 [2024-11-09 04:52:10,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196681896] [2024-11-09 04:52:10,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:52:10,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 04:52:10,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:52:10,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 04:52:10,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1499, Unknown=0, NotChecked=0, Total=1640 [2024-11-09 04:52:10,470 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:52:10,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:52:10,893 INFO L93 Difference]: Finished difference Result 128 states and 142 transitions. [2024-11-09 04:52:10,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 04:52:10,894 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-09 04:52:10,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:52:10,895 INFO L225 Difference]: With dead ends: 128 [2024-11-09 04:52:10,895 INFO L226 Difference]: Without dead ends: 85 [2024-11-09 04:52:10,896 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=202, Invalid=2248, Unknown=0, NotChecked=0, Total=2450 [2024-11-09 04:52:10,896 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 63 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:52:10,896 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 181 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:52:10,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-11-09 04:52:10,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2024-11-09 04:52:10,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.125) internal successors, (90), 80 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 04:52:10,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2024-11-09 04:52:10,904 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 39 [2024-11-09 04:52:10,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:52:10,904 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2024-11-09 04:52:10,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:52:10,904 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2024-11-09 04:52:10,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-09 04:52:10,905 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:52:10,905 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:52:10,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 04:52:11,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:52:11,105 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:52:11,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:52:11,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1909845334, now seen corresponding path program 7 times [2024-11-09 04:52:11,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:52:11,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234520847] [2024-11-09 04:52:11,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:52:11,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:52:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:52:11,701 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:11,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:52:11,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234520847] [2024-11-09 04:52:11,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234520847] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:52:11,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940030378] [2024-11-09 04:52:11,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:52:11,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:52:11,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:52:11,704 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:52:11,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 04:52:11,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:52:11,831 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-09 04:52:11,836 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:52:12,059 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:12,059 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:52:12,303 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 04:52:12,394 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:12,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940030378] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:52:12,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [880376303] [2024-11-09 04:52:12,396 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:52:12,396 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:52:12,396 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:52:12,397 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:52:12,397 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:52:13,096 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:52:14,340 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5435#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:52:14,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:52:14,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:52:14,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 28 [2024-11-09 04:52:14,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027528576] [2024-11-09 04:52:14,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:52:14,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-09 04:52:14,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:52:14,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-09 04:52:14,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1804, Unknown=0, NotChecked=0, Total=1980 [2024-11-09 04:52:14,344 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 29 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:52:14,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:52:14,781 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2024-11-09 04:52:14,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 04:52:14,781 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 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 04:52:14,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:52:14,782 INFO L225 Difference]: With dead ends: 93 [2024-11-09 04:52:14,782 INFO L226 Difference]: Without dead ends: 93 [2024-11-09 04:52:14,783 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=247, Invalid=2405, Unknown=0, NotChecked=0, Total=2652 [2024-11-09 04:52:14,784 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 65 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:52:14,784 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 185 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:52:14,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-09 04:52:14,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2024-11-09 04:52:14,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.130952380952381) internal successors, (95), 84 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:52:14,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2024-11-09 04:52:14,788 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 42 [2024-11-09 04:52:14,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:52:14,788 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2024-11-09 04:52:14,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.2857142857142856) internal successors, (92), 29 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:52:14,788 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2024-11-09 04:52:14,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 04:52:14,789 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:52:14,789 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:52:14,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 04:52:14,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:52:14,994 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:52:14,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:52:14,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1925144431, now seen corresponding path program 8 times [2024-11-09 04:52:14,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:52:14,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524356558] [2024-11-09 04:52:14,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:52:14,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:52:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:52:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 13 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:15,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:52:15,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524356558] [2024-11-09 04:52:15,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524356558] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:52:15,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597438463] [2024-11-09 04:52:15,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:52:15,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:52:15,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:52:15,585 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:52:15,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 04:52:15,845 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-09 04:52:15,845 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:52:15,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-09 04:52:15,854 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:52:15,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 04:52:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 13 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:16,073 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:52:16,113 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 04:52:16,116 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 16 treesize of output 12 [2024-11-09 04:52:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 13 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:16,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597438463] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:52:16,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [838018296] [2024-11-09 04:52:16,193 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:52:16,193 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:52:16,193 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:52:16,194 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:52:16,194 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:52:16,802 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:52:17,952 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5941#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:52:17,952 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:52:17,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:52:17,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 28 [2024-11-09 04:52:17,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580778080] [2024-11-09 04:52:17,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:52:17,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 04:52:17,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:52:17,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 04:52:17,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1743, Unknown=0, NotChecked=0, Total=1892 [2024-11-09 04:52:17,955 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 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 04:52:18,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:52:18,561 INFO L93 Difference]: Finished difference Result 143 states and 159 transitions. [2024-11-09 04:52:18,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 04:52:18,562 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 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) Word has length 46 [2024-11-09 04:52:18,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:52:18,562 INFO L225 Difference]: With dead ends: 143 [2024-11-09 04:52:18,562 INFO L226 Difference]: Without dead ends: 95 [2024-11-09 04:52:18,563 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=222, Invalid=2748, Unknown=0, NotChecked=0, Total=2970 [2024-11-09 04:52:18,564 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 52 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:52:18,564 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 231 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:52:18,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-09 04:52:18,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2024-11-09 04:52:18,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1222222222222222) internal successors, (101), 90 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 04:52:18,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2024-11-09 04:52:18,567 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 46 [2024-11-09 04:52:18,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:52:18,568 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2024-11-09 04:52:18,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 28 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 04:52:18,568 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2024-11-09 04:52:18,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-09 04:52:18,569 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:52:18,569 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:52:18,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-09 04:52:18,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 04:52:18,770 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:52:18,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:52:18,770 INFO L85 PathProgramCache]: Analyzing trace with hash -555537323, now seen corresponding path program 9 times [2024-11-09 04:52:18,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:52:18,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440789470] [2024-11-09 04:52:18,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:52:18,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:52:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:52:19,466 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:19,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:52:19,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440789470] [2024-11-09 04:52:19,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440789470] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:52:19,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806017670] [2024-11-09 04:52:19,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:52:19,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:52:19,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:52:19,469 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:52:19,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 04:52:19,591 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:52:19,591 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:52:19,593 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-09 04:52:19,596 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:52:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:19,865 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:52:20,183 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 04:52:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:20,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806017670] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:52:20,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [292094331] [2024-11-09 04:52:20,293 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:52:20,293 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:52:20,293 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:52:20,293 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:52:20,293 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:52:20,832 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:52:21,961 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6534#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:52:21,961 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:52:21,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:52:21,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 32 [2024-11-09 04:52:21,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797277229] [2024-11-09 04:52:21,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:52:21,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-09 04:52:21,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:52:21,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-09 04:52:21,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2148, Unknown=0, NotChecked=0, Total=2352 [2024-11-09 04:52:21,964 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 33 states, 32 states have (on average 3.3125) internal successors, (106), 33 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 04:52:22,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:52:22,558 INFO L93 Difference]: Finished difference Result 104 states and 116 transitions. [2024-11-09 04:52:22,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 04:52:22,559 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.3125) internal successors, (106), 33 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 49 [2024-11-09 04:52:22,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:52:22,559 INFO L225 Difference]: With dead ends: 104 [2024-11-09 04:52:22,559 INFO L226 Difference]: Without dead ends: 104 [2024-11-09 04:52:22,560 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 106 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=290, Invalid=2902, Unknown=0, NotChecked=0, Total=3192 [2024-11-09 04:52:22,561 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 76 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:52:22,561 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 263 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:52:22,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-09 04:52:22,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2024-11-09 04:52:22,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.127659574468085) internal successors, (106), 94 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 04:52:22,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2024-11-09 04:52:22,564 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 49 [2024-11-09 04:52:22,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:52:22,565 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2024-11-09 04:52:22,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.3125) internal successors, (106), 33 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 04:52:22,565 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2024-11-09 04:52:22,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-09 04:52:22,566 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:52:22,566 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:52:22,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 04:52:22,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-09 04:52:22,767 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:52:22,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:52:22,767 INFO L85 PathProgramCache]: Analyzing trace with hash 682470298, now seen corresponding path program 10 times [2024-11-09 04:52:22,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:52:22,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260070114] [2024-11-09 04:52:22,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:52:22,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:52:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:52:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 16 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:23,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:52:23,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260070114] [2024-11-09 04:52:23,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260070114] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:52:23,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380623037] [2024-11-09 04:52:23,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:52:23,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:52:23,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:52:23,533 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:52:23,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 04:52:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:52:23,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-09 04:52:23,686 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:52:23,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 04:52:23,929 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 16 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:23,929 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:52:23,974 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 04:52:23,975 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 04:52:24,048 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 16 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:24,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380623037] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:52:24,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1593173259] [2024-11-09 04:52:24,050 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:52:24,050 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:52:24,050 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:52:24,051 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:52:24,051 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:52:24,530 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:52:25,732 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7108#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:52:25,732 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:52:25,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:52:25,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 31 [2024-11-09 04:52:25,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842264507] [2024-11-09 04:52:25,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:52:25,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 04:52:25,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:52:25,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 04:52:25,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2005, Unknown=0, NotChecked=0, Total=2162 [2024-11-09 04:52:25,734 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand has 31 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:52:26,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:52:26,544 INFO L93 Difference]: Finished difference Result 158 states and 176 transitions. [2024-11-09 04:52:26,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 04:52:26,544 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2024-11-09 04:52:26,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:52:26,545 INFO L225 Difference]: With dead ends: 158 [2024-11-09 04:52:26,545 INFO L226 Difference]: Without dead ends: 105 [2024-11-09 04:52:26,546 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=242, Invalid=3298, Unknown=0, NotChecked=0, Total=3540 [2024-11-09 04:52:26,547 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 04:52:26,547 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 357 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 04:52:26,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-09 04:52:26,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2024-11-09 04:52:26,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.12) internal successors, (112), 100 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 04:52:26,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2024-11-09 04:52:26,550 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 53 [2024-11-09 04:52:26,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:52:26,550 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2024-11-09 04:52:26,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:52:26,551 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2024-11-09 04:52:26,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-09 04:52:26,551 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:52:26,551 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:52:26,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-09 04:52:26,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:52:26,756 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:52:26,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:52:26,756 INFO L85 PathProgramCache]: Analyzing trace with hash 591048692, now seen corresponding path program 11 times [2024-11-09 04:52:26,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:52:26,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016248176] [2024-11-09 04:52:26,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:52:26,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:52:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:52:27,559 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 22 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:27,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:52:27,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016248176] [2024-11-09 04:52:27,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016248176] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:52:27,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734094229] [2024-11-09 04:52:27,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:52:27,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:52:27,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:52:27,562 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:52:27,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 04:52:27,804 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-09 04:52:27,805 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:52:27,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-09 04:52:27,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:52:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 40 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:28,241 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:52:28,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-09 04:52:28,736 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 40 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:28,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734094229] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:52:28,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [959152793] [2024-11-09 04:52:28,737 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:52:28,737 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:52:28,738 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:52:28,738 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:52:28,738 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:52:29,344 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:52:30,597 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7782#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:52:30,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:52:30,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:52:30,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 42 [2024-11-09 04:52:30,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585382981] [2024-11-09 04:52:30,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:52:30,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-09 04:52:30,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:52:30,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-09 04:52:30,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=3092, Unknown=0, NotChecked=0, Total=3422 [2024-11-09 04:52:30,600 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand has 43 states, 42 states have (on average 3.357142857142857) internal successors, (141), 43 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:52:31,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:52:31,310 INFO L93 Difference]: Finished difference Result 115 states and 128 transitions. [2024-11-09 04:52:31,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 04:52:31,311 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 3.357142857142857) internal successors, (141), 43 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2024-11-09 04:52:31,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:52:31,311 INFO L225 Difference]: With dead ends: 115 [2024-11-09 04:52:31,311 INFO L226 Difference]: Without dead ends: 115 [2024-11-09 04:52:31,313 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 118 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1918 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=468, Invalid=4088, Unknown=0, NotChecked=0, Total=4556 [2024-11-09 04:52:31,314 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 150 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:52:31,314 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 278 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:52:31,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-09 04:52:31,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2024-11-09 04:52:31,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.125) internal successors, (117), 104 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 04:52:31,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2024-11-09 04:52:31,318 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 56 [2024-11-09 04:52:31,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:52:31,318 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2024-11-09 04:52:31,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 3.357142857142857) internal successors, (141), 43 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:52:31,319 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2024-11-09 04:52:31,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-09 04:52:31,319 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:52:31,319 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:52:31,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 04:52:31,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-09 04:52:31,526 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:52:31,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:52:31,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1471395911, now seen corresponding path program 12 times [2024-11-09 04:52:31,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:52:31,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232055936] [2024-11-09 04:52:31,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:52:31,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:52:31,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:52:32,482 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 19 proven. 123 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:32,482 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:52:32,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232055936] [2024-11-09 04:52:32,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232055936] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:52:32,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389144223] [2024-11-09 04:52:32,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:52:32,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:52:32,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:52:32,484 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:52:32,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 04:52:32,620 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:52:32,620 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:52:32,622 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-09 04:52:32,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:52:32,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 04:52:32,915 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 19 proven. 123 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:32,915 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:52:32,962 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 04:52:32,964 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 04:52:33,051 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 19 proven. 123 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:33,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389144223] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:52:33,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1992360180] [2024-11-09 04:52:33,052 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:52:33,052 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:52:33,053 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:52:33,053 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:52:33,053 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:52:33,604 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:52:34,880 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8424#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:52:34,880 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:52:34,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:52:34,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 34 [2024-11-09 04:52:34,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466964022] [2024-11-09 04:52:34,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:52:34,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-09 04:52:34,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:52:34,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-09 04:52:34,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2285, Unknown=0, NotChecked=0, Total=2450 [2024-11-09 04:52:34,882 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand has 34 states, 34 states have (on average 2.911764705882353) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:52:35,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:52:35,778 INFO L93 Difference]: Finished difference Result 173 states and 193 transitions. [2024-11-09 04:52:35,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 04:52:35,779 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.911764705882353) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 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 04:52:35,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:52:35,780 INFO L225 Difference]: With dead ends: 173 [2024-11-09 04:52:35,780 INFO L226 Difference]: Without dead ends: 115 [2024-11-09 04:52:35,781 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=262, Invalid=3898, Unknown=0, NotChecked=0, Total=4160 [2024-11-09 04:52:35,781 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 105 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 04:52:35,781 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 440 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 04:52:35,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-09 04:52:35,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2024-11-09 04:52:35,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1181818181818182) internal successors, (123), 110 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:52:35,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2024-11-09 04:52:35,785 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 60 [2024-11-09 04:52:35,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:52:35,785 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2024-11-09 04:52:35,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.911764705882353) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:52:35,785 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2024-11-09 04:52:35,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-09 04:52:35,786 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:52:35,786 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:52:35,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-09 04:52:35,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-09 04:52:35,987 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:52:35,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:52:35,987 INFO L85 PathProgramCache]: Analyzing trace with hash 788302367, now seen corresponding path program 13 times [2024-11-09 04:52:35,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:52:35,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215533566] [2024-11-09 04:52:35,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:52:35,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:52:36,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:52:36,868 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 35 proven. 126 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:36,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:52:36,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215533566] [2024-11-09 04:52:36,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215533566] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:52:36,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636791081] [2024-11-09 04:52:36,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:52:36,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:52:36,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:52:36,870 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:52:36,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 04:52:37,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:52:37,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-09 04:52:37,023 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:52:37,318 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 51 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:37,319 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:52:37,664 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 04:52:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 51 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:37,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636791081] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:52:37,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1026915425] [2024-11-09 04:52:37,808 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:52:37,808 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:52:37,808 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:52:37,809 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:52:37,809 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:52:38,268 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:52:39,535 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9167#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:52:39,535 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:52:39,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:52:39,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 40 [2024-11-09 04:52:39,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851442573] [2024-11-09 04:52:39,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:52:39,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-09 04:52:39,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:52:39,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-09 04:52:39,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=2912, Unknown=0, NotChecked=0, Total=3192 [2024-11-09 04:52:39,538 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand has 41 states, 40 states have (on average 3.35) internal successors, (134), 41 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:52:40,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:52:40,267 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2024-11-09 04:52:40,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 04:52:40,268 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.35) internal successors, (134), 41 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2024-11-09 04:52:40,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:52:40,268 INFO L225 Difference]: With dead ends: 126 [2024-11-09 04:52:40,269 INFO L226 Difference]: Without dead ends: 126 [2024-11-09 04:52:40,269 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 142 SyntacticMatches, 8 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1796 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=399, Invalid=4023, Unknown=0, NotChecked=0, Total=4422 [2024-11-09 04:52:40,270 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 210 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 04:52:40,270 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 353 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 04:52:40,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-09 04:52:40,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 115. [2024-11-09 04:52:40,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.1228070175438596) internal successors, (128), 114 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 04:52:40,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 128 transitions. [2024-11-09 04:52:40,276 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 128 transitions. Word has length 63 [2024-11-09 04:52:40,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:52:40,276 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 128 transitions. [2024-11-09 04:52:40,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.35) internal successors, (134), 41 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:52:40,276 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 128 transitions. [2024-11-09 04:52:40,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-09 04:52:40,277 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:52:40,277 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:52:40,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-09 04:52:40,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:52:40,478 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:52:40,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:52:40,478 INFO L85 PathProgramCache]: Analyzing trace with hash -303098780, now seen corresponding path program 14 times [2024-11-09 04:52:40,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:52:40,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269081557] [2024-11-09 04:52:40,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:52:40,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:52:40,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:52:41,436 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 22 proven. 168 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:41,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:52:41,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269081557] [2024-11-09 04:52:41,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269081557] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:52:41,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913410813] [2024-11-09 04:52:41,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:52:41,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:52:41,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:52:41,439 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:52:41,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 04:52:41,858 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-09 04:52:41,858 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:52:41,862 INFO L255 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-11-09 04:52:41,866 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:52:41,984 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 04:52:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 22 proven. 168 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:42,234 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:52:42,334 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 04:52:42,338 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 04:52:42,630 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 22 proven. 168 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:42,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913410813] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:52:42,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [151598043] [2024-11-09 04:52:42,632 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:52:42,632 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:52:42,632 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:52:42,632 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:52:42,632 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:52:43,246 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:52:44,687 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9883#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:52:44,687 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:52:44,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:52:44,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 43 [2024-11-09 04:52:44,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48480645] [2024-11-09 04:52:44,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:52:44,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-09 04:52:44,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:52:44,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-09 04:52:44,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3230, Unknown=0, NotChecked=0, Total=3422 [2024-11-09 04:52:44,690 INFO L87 Difference]: Start difference. First operand 115 states and 128 transitions. Second operand has 43 states, 43 states have (on average 3.116279069767442) internal successors, (134), 43 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:52:45,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:52:45,744 INFO L93 Difference]: Finished difference Result 188 states and 210 transitions. [2024-11-09 04:52:45,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-09 04:52:45,744 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.116279069767442) internal successors, (134), 43 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2024-11-09 04:52:45,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:52:45,745 INFO L225 Difference]: With dead ends: 188 [2024-11-09 04:52:45,745 INFO L226 Difference]: Without dead ends: 125 [2024-11-09 04:52:45,745 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=298, Invalid=5252, Unknown=0, NotChecked=0, Total=5550 [2024-11-09 04:52:45,746 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 79 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 1582 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 04:52:45,746 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 513 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1582 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 04:52:45,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-09 04:52:45,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 121. [2024-11-09 04:52:45,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.1166666666666667) internal successors, (134), 120 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:52:45,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2024-11-09 04:52:45,759 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 67 [2024-11-09 04:52:45,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:52:45,761 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2024-11-09 04:52:45,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.116279069767442) internal successors, (134), 43 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:52:45,761 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2024-11-09 04:52:45,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-11-09 04:52:45,762 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:52:45,762 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:52:45,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-09 04:52:45,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:52:45,963 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:52:45,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:52:45,964 INFO L85 PathProgramCache]: Analyzing trace with hash -225938626, now seen corresponding path program 15 times [2024-11-09 04:52:45,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:52:45,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413109596] [2024-11-09 04:52:45,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:52:45,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:52:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:52:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 51 proven. 161 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:47,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:52:47,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413109596] [2024-11-09 04:52:47,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413109596] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:52:47,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991859761] [2024-11-09 04:52:47,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:52:47,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:52:47,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:52:47,091 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:52:47,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 04:52:47,254 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:52:47,254 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:52:47,256 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-11-09 04:52:47,260 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:52:47,678 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 70 proven. 142 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:47,679 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:52:48,147 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 04:52:48,332 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 70 proven. 142 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:48,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991859761] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:52:48,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1933374593] [2024-11-09 04:52:48,334 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:52:48,334 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:52:48,334 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:52:48,334 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:52:48,334 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:52:48,779 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:52:50,149 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10699#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:52:50,149 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:52:50,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:52:50,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 44 [2024-11-09 04:52:50,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504964347] [2024-11-09 04:52:50,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:52:50,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-09 04:52:50,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:52:50,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-09 04:52:50,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=3348, Unknown=0, NotChecked=0, Total=3660 [2024-11-09 04:52:50,151 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand has 45 states, 44 states have (on average 3.3636363636363638) internal successors, (148), 45 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 04:52:51,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:52:51,071 INFO L93 Difference]: Finished difference Result 137 states and 152 transitions. [2024-11-09 04:52:51,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 04:52:51,072 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 3.3636363636363638) internal successors, (148), 45 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) Word has length 70 [2024-11-09 04:52:51,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:52:51,072 INFO L225 Difference]: With dead ends: 137 [2024-11-09 04:52:51,073 INFO L226 Difference]: Without dead ends: 137 [2024-11-09 04:52:51,073 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2102 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=449, Invalid=4663, Unknown=0, NotChecked=0, Total=5112 [2024-11-09 04:52:51,074 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 127 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 1376 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 1377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 04:52:51,074 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 458 Invalid, 1377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1376 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 04:52:51,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-09 04:52:51,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 125. [2024-11-09 04:52:51,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1209677419354838) internal successors, (139), 124 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:52:51,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 139 transitions. [2024-11-09 04:52:51,077 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 139 transitions. Word has length 70 [2024-11-09 04:52:51,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:52:51,078 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 139 transitions. [2024-11-09 04:52:51,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 3.3636363636363638) internal successors, (148), 45 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 04:52:51,078 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 139 transitions. [2024-11-09 04:52:51,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-09 04:52:51,078 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:52:51,079 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:52:51,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-09 04:52:51,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:52:51,283 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:52:51,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:52:51,283 INFO L85 PathProgramCache]: Analyzing trace with hash -921479677, now seen corresponding path program 16 times [2024-11-09 04:52:51,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:52:51,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856720074] [2024-11-09 04:52:51,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:52:51,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:52:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:52:52,395 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 25 proven. 220 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:52,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:52:52,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856720074] [2024-11-09 04:52:52,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856720074] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:52:52,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698047821] [2024-11-09 04:52:52,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:52:52,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:52:52,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:52:52,397 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:52:52,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 04:52:52,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:52:52,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-09 04:52:52,594 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:52:52,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 04:52:52,985 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 25 proven. 220 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:52,985 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:52:53,044 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 04:52:53,050 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 04:52:53,150 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 25 proven. 220 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:53,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698047821] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:52:53,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [759515253] [2024-11-09 04:52:53,153 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:52:53,153 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:52:53,153 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:52:53,153 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:52:53,153 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:52:53,684 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:52:55,092 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11477#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:52:55,092 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:52:55,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:52:55,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 40 [2024-11-09 04:52:55,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723962511] [2024-11-09 04:52:55,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:52:55,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-09 04:52:55,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:52:55,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-09 04:52:55,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2899, Unknown=0, NotChecked=0, Total=3080 [2024-11-09 04:52:55,095 INFO L87 Difference]: Start difference. First operand 125 states and 139 transitions. Second operand has 40 states, 40 states have (on average 2.975) internal successors, (119), 40 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:52:56,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:52:56,328 INFO L93 Difference]: Finished difference Result 203 states and 227 transitions. [2024-11-09 04:52:56,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-09 04:52:56,328 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.975) internal successors, (119), 40 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2024-11-09 04:52:56,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:52:56,329 INFO L225 Difference]: With dead ends: 203 [2024-11-09 04:52:56,329 INFO L226 Difference]: Without dead ends: 135 [2024-11-09 04:52:56,330 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1440 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=302, Invalid=5248, Unknown=0, NotChecked=0, Total=5550 [2024-11-09 04:52:56,331 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 134 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 1755 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 04:52:56,331 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 574 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1755 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 04:52:56,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-09 04:52:56,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2024-11-09 04:52:56,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.1153846153846154) internal successors, (145), 130 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:52:56,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 145 transitions. [2024-11-09 04:52:56,334 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 145 transitions. Word has length 74 [2024-11-09 04:52:56,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:52:56,335 INFO L471 AbstractCegarLoop]: Abstraction has 131 states and 145 transitions. [2024-11-09 04:52:56,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.975) internal successors, (119), 40 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:52:56,335 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 145 transitions. [2024-11-09 04:52:56,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-09 04:52:56,336 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:52:56,336 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:52:56,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-09 04:52:56,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-09 04:52:56,540 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:52:56,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:52:56,540 INFO L85 PathProgramCache]: Analyzing trace with hash 982805993, now seen corresponding path program 17 times [2024-11-09 04:52:56,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:52:56,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700981434] [2024-11-09 04:52:56,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:52:56,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:52:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:52:57,726 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 70 proven. 200 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:57,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:52:57,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700981434] [2024-11-09 04:52:57,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700981434] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:52:57,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461811139] [2024-11-09 04:52:57,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:52:57,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:52:57,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:52:57,728 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:52:57,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-09 04:52:58,039 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-09 04:52:58,039 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:52:58,044 INFO L255 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-11-09 04:52:58,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:52:58,680 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 100 proven. 170 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:58,681 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:52:59,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-09 04:52:59,486 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 100 proven. 170 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:52:59,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461811139] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:52:59,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [269395272] [2024-11-09 04:52:59,487 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:52:59,487 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:52:59,488 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:52:59,488 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:52:59,488 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:52:59,932 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:53:01,503 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12379#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:53:01,503 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:53:01,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:53:01,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 57 [2024-11-09 04:53:01,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089610629] [2024-11-09 04:53:01,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:53:01,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-09 04:53:01,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:53:01,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-09 04:53:01,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=4850, Unknown=0, NotChecked=0, Total=5402 [2024-11-09 04:53:01,505 INFO L87 Difference]: Start difference. First operand 131 states and 145 transitions. Second operand has 58 states, 57 states have (on average 3.4210526315789473) internal successors, (195), 58 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:53:02,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:53:02,469 INFO L93 Difference]: Finished difference Result 148 states and 164 transitions. [2024-11-09 04:53:02,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-09 04:53:02,470 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 3.4210526315789473) internal successors, (195), 58 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2024-11-09 04:53:02,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:53:02,472 INFO L225 Difference]: With dead ends: 148 [2024-11-09 04:53:02,472 INFO L226 Difference]: Without dead ends: 148 [2024-11-09 04:53:02,473 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 169 SyntacticMatches, 10 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3214 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=777, Invalid=6533, Unknown=0, NotChecked=0, Total=7310 [2024-11-09 04:53:02,473 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 184 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 04:53:02,473 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 471 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1329 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 04:53:02,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-11-09 04:53:02,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 135. [2024-11-09 04:53:02,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.1194029850746268) internal successors, (150), 134 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 04:53:02,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 150 transitions. [2024-11-09 04:53:02,478 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 150 transitions. Word has length 77 [2024-11-09 04:53:02,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:53:02,478 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 150 transitions. [2024-11-09 04:53:02,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 3.4210526315789473) internal successors, (195), 58 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:53:02,479 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 150 transitions. [2024-11-09 04:53:02,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-11-09 04:53:02,480 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:53:02,480 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:53:02,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-09 04:53:02,684 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-09 04:53:02,684 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:53:02,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:53:02,685 INFO L85 PathProgramCache]: Analyzing trace with hash -537132242, now seen corresponding path program 18 times [2024-11-09 04:53:02,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:53:02,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571371183] [2024-11-09 04:53:02,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:53:02,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:53:02,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:53:03,966 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 28 proven. 279 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:53:03,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:53:03,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571371183] [2024-11-09 04:53:03,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571371183] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:53:03,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340503374] [2024-11-09 04:53:03,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:53:03,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:53:03,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:53:03,968 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:53:03,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-09 04:53:04,154 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:53:04,154 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:53:04,157 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-11-09 04:53:04,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:53:04,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 04:53:04,600 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 28 proven. 279 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:53:04,600 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:53:04,689 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 04:53:04,691 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 04:53:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 28 proven. 279 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:53:04,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340503374] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:53:04,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [444869091] [2024-11-09 04:53:04,835 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:53:04,836 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:53:04,836 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:53:04,836 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:53:04,836 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:53:05,373 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:53:06,940 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13225#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:53:06,940 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:53:06,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:53:06,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 43 [2024-11-09 04:53:06,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13100891] [2024-11-09 04:53:06,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:53:06,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-09 04:53:06,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:53:06,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-09 04:53:06,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3233, Unknown=0, NotChecked=0, Total=3422 [2024-11-09 04:53:06,943 INFO L87 Difference]: Start difference. First operand 135 states and 150 transitions. Second operand has 43 states, 43 states have (on average 3.0) internal successors, (129), 43 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:53:08,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:53:08,486 INFO L93 Difference]: Finished difference Result 218 states and 244 transitions. [2024-11-09 04:53:08,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-09 04:53:08,487 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.0) internal successors, (129), 43 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2024-11-09 04:53:08,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:53:08,487 INFO L225 Difference]: With dead ends: 218 [2024-11-09 04:53:08,487 INFO L226 Difference]: Without dead ends: 145 [2024-11-09 04:53:08,488 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=322, Invalid=5998, Unknown=0, NotChecked=0, Total=6320 [2024-11-09 04:53:08,489 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 91 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 2325 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 2334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:53:08,489 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 738 Invalid, 2334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2325 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 04:53:08,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-11-09 04:53:08,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 141. [2024-11-09 04:53:08,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.1142857142857143) internal successors, (156), 140 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:53:08,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 156 transitions. [2024-11-09 04:53:08,493 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 156 transitions. Word has length 81 [2024-11-09 04:53:08,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:53:08,493 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 156 transitions. [2024-11-09 04:53:08,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.0) internal successors, (129), 43 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:53:08,494 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 156 transitions. [2024-11-09 04:53:08,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-09 04:53:08,494 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:53:08,495 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:53:08,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-09 04:53:08,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-09 04:53:08,699 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:53:08,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:53:08,699 INFO L85 PathProgramCache]: Analyzing trace with hash 2058443912, now seen corresponding path program 19 times [2024-11-09 04:53:08,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:53:08,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515530026] [2024-11-09 04:53:08,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:53:08,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:53:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:53:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 92 proven. 243 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:53:09,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:53:09,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515530026] [2024-11-09 04:53:09,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515530026] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:53:09,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212814639] [2024-11-09 04:53:09,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:53:09,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:53:09,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:53:09,991 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:53:09,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-09 04:53:10,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:53:10,202 INFO L255 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 102 conjuncts are in the unsatisfiable core [2024-11-09 04:53:10,207 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:53:10,672 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 117 proven. 218 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:53:10,672 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:53:11,248 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 04:53:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 117 proven. 218 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:53:11,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212814639] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:53:11,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1584081483] [2024-11-09 04:53:11,494 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:53:11,495 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:53:11,495 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:53:11,495 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:53:11,495 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:53:11,921 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:53:13,437 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14193#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:53:13,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:53:13,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:53:13,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 52 [2024-11-09 04:53:13,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955588708] [2024-11-09 04:53:13,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:53:13,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-09 04:53:13,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:53:13,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-09 04:53:13,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=4280, Unknown=0, NotChecked=0, Total=4692 [2024-11-09 04:53:13,439 INFO L87 Difference]: Start difference. First operand 141 states and 156 transitions. Second operand has 53 states, 52 states have (on average 3.3846153846153846) internal successors, (176), 53 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:53:14,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:53:14,523 INFO L93 Difference]: Finished difference Result 159 states and 176 transitions. [2024-11-09 04:53:14,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-09 04:53:14,524 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 3.3846153846153846) internal successors, (176), 53 states have internal predecessors, (176), 0 states have call successors, (0), 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 84 [2024-11-09 04:53:14,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:53:14,525 INFO L225 Difference]: With dead ends: 159 [2024-11-09 04:53:14,525 INFO L226 Difference]: Without dead ends: 159 [2024-11-09 04:53:14,526 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 196 SyntacticMatches, 11 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2819 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=588, Invalid=6054, Unknown=0, NotChecked=0, Total=6642 [2024-11-09 04:53:14,526 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 202 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 1734 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 1735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 04:53:14,526 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 568 Invalid, 1735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1734 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 04:53:14,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-09 04:53:14,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 145. [2024-11-09 04:53:14,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.1180555555555556) internal successors, (161), 144 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:53:14,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 161 transitions. [2024-11-09 04:53:14,531 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 161 transitions. Word has length 84 [2024-11-09 04:53:14,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:53:14,533 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 161 transitions. [2024-11-09 04:53:14,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 3.3846153846153846) internal successors, (176), 53 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:53:14,534 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 161 transitions. [2024-11-09 04:53:14,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-09 04:53:14,534 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:53:14,534 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:53:14,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-09 04:53:14,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-09 04:53:14,735 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:53:14,735 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:53:14,735 INFO L85 PathProgramCache]: Analyzing trace with hash -726496691, now seen corresponding path program 20 times [2024-11-09 04:53:14,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:53:14,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600252107] [2024-11-09 04:53:14,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:53:14,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:53:14,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:53:16,128 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 31 proven. 345 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:53:16,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:53:16,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600252107] [2024-11-09 04:53:16,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600252107] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:53:16,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531218688] [2024-11-09 04:53:16,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:53:16,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:53:16,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:53:16,130 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:53:16,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-09 04:53:16,559 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-09 04:53:16,559 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:53:16,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 117 conjuncts are in the unsatisfiable core [2024-11-09 04:53:16,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:53:16,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 04:53:17,014 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 31 proven. 345 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:53:17,014 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:53:17,083 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 04:53:17,085 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 04:53:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 31 proven. 345 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:53:17,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531218688] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:53:17,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1825592590] [2024-11-09 04:53:17,193 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:53:17,193 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:53:17,194 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:53:17,194 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:53:17,194 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:53:17,635 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:53:19,146 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15107#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:53:19,146 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:53:19,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:53:19,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 46 [2024-11-09 04:53:19,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182599210] [2024-11-09 04:53:19,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:53:19,147 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-09 04:53:19,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:53:19,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-09 04:53:19,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=3585, Unknown=0, NotChecked=0, Total=3782 [2024-11-09 04:53:19,148 INFO L87 Difference]: Start difference. First operand 145 states and 161 transitions. Second operand has 46 states, 46 states have (on average 3.0) internal successors, (138), 46 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 04:53:20,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:53:20,994 INFO L93 Difference]: Finished difference Result 233 states and 261 transitions. [2024-11-09 04:53:20,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-09 04:53:20,995 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.0) internal successors, (138), 46 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) Word has length 88 [2024-11-09 04:53:20,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:53:20,995 INFO L225 Difference]: With dead ends: 233 [2024-11-09 04:53:20,995 INFO L226 Difference]: Without dead ends: 155 [2024-11-09 04:53:20,996 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1817 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=342, Invalid=6798, Unknown=0, NotChecked=0, Total=7140 [2024-11-09 04:53:20,996 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 97 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 2892 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 2903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:53:20,996 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 922 Invalid, 2903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2892 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 04:53:20,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-11-09 04:53:20,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2024-11-09 04:53:20,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.1133333333333333) internal successors, (167), 150 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:53:20,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 167 transitions. [2024-11-09 04:53:20,999 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 167 transitions. Word has length 88 [2024-11-09 04:53:20,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:53:21,000 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 167 transitions. [2024-11-09 04:53:21,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.0) internal successors, (138), 46 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 04:53:21,000 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 167 transitions. [2024-11-09 04:53:21,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-11-09 04:53:21,000 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:53:21,001 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:53:21,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-09 04:53:21,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-09 04:53:21,201 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:53:21,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:53:21,202 INFO L85 PathProgramCache]: Analyzing trace with hash -2111776845, now seen corresponding path program 21 times [2024-11-09 04:53:21,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:53:21,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036502846] [2024-11-09 04:53:21,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:53:21,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:53:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:53:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 117 proven. 290 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:53:22,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:53:22,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036502846] [2024-11-09 04:53:22,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036502846] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:53:22,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222671960] [2024-11-09 04:53:22,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:53:22,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:53:22,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:53:22,526 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:53:22,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-09 04:53:22,750 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:53:22,750 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:53:22,759 INFO L255 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-11-09 04:53:22,764 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:53:23,271 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 145 proven. 262 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:53:23,271 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:53:23,884 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 04:53:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 145 proven. 262 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:53:24,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222671960] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:53:24,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1133324332] [2024-11-09 04:53:24,166 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:53:24,166 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:53:24,166 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:53:24,166 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:53:24,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:53:24,627 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:53:26,082 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16150#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:53:26,082 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:53:26,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:53:26,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 56 [2024-11-09 04:53:26,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499618191] [2024-11-09 04:53:26,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:53:26,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-09 04:53:26,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:53:26,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-09 04:53:26,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=4792, Unknown=0, NotChecked=0, Total=5256 [2024-11-09 04:53:26,085 INFO L87 Difference]: Start difference. First operand 151 states and 167 transitions. Second operand has 57 states, 56 states have (on average 3.392857142857143) internal successors, (190), 57 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:53:27,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:53:27,476 INFO L93 Difference]: Finished difference Result 170 states and 188 transitions. [2024-11-09 04:53:27,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-09 04:53:27,477 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 3.392857142857143) internal successors, (190), 57 states have internal predecessors, (190), 0 states have call successors, (0), 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 91 [2024-11-09 04:53:27,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:53:27,478 INFO L225 Difference]: With dead ends: 170 [2024-11-09 04:53:27,478 INFO L226 Difference]: Without dead ends: 170 [2024-11-09 04:53:27,478 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 214 SyntacticMatches, 12 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3210 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=661, Invalid=6821, Unknown=0, NotChecked=0, Total=7482 [2024-11-09 04:53:27,478 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 124 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 2320 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 2321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:53:27,479 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 737 Invalid, 2321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2320 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 04:53:27,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-11-09 04:53:27,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 155. [2024-11-09 04:53:27,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.1168831168831168) internal successors, (172), 154 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:53:27,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 172 transitions. [2024-11-09 04:53:27,482 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 172 transitions. Word has length 91 [2024-11-09 04:53:27,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:53:27,482 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 172 transitions. [2024-11-09 04:53:27,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 3.392857142857143) internal successors, (190), 57 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:53:27,483 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 172 transitions. [2024-11-09 04:53:27,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-09 04:53:27,483 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:53:27,483 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:53:27,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-09 04:53:27,684 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:53:27,684 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:53:27,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:53:27,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1414166520, now seen corresponding path program 22 times [2024-11-09 04:53:27,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:53:27,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905813393] [2024-11-09 04:53:27,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:53:27,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:53:27,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:53:29,141 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 34 proven. 418 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:53:29,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:53:29,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905813393] [2024-11-09 04:53:29,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905813393] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:53:29,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700625216] [2024-11-09 04:53:29,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:53:29,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:53:29,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:53:29,143 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:53:29,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-09 04:53:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:53:29,372 INFO L255 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 127 conjuncts are in the unsatisfiable core [2024-11-09 04:53:29,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:53:29,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 04:53:29,889 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 34 proven. 418 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:53:29,889 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:53:29,965 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 04:53:29,970 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 04:53:30,088 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 34 proven. 418 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:53:30,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700625216] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:53:30,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2047351315] [2024-11-09 04:53:30,089 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:53:30,089 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:53:30,089 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:53:30,090 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:53:30,090 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:53:30,536 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:53:32,101 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17132#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:53:32,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:53:32,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:53:32,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 49 [2024-11-09 04:53:32,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751553841] [2024-11-09 04:53:32,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:53:32,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-09 04:53:32,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:53:32,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-09 04:53:32,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=3955, Unknown=0, NotChecked=0, Total=4160 [2024-11-09 04:53:32,103 INFO L87 Difference]: Start difference. First operand 155 states and 172 transitions. Second operand has 49 states, 49 states have (on average 3.0408163265306123) internal successors, (149), 49 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:53:33,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:53:33,943 INFO L93 Difference]: Finished difference Result 248 states and 278 transitions. [2024-11-09 04:53:33,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-09 04:53:33,944 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.0408163265306123) internal successors, (149), 49 states have internal predecessors, (149), 0 states have call successors, (0), 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 95 [2024-11-09 04:53:33,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:53:33,945 INFO L225 Difference]: With dead ends: 248 [2024-11-09 04:53:33,945 INFO L226 Difference]: Without dead ends: 165 [2024-11-09 04:53:33,945 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2022 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=362, Invalid=7648, Unknown=0, NotChecked=0, Total=8010 [2024-11-09 04:53:33,946 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 109 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 2581 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 2592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:53:33,946 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 774 Invalid, 2592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2581 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 04:53:33,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-11-09 04:53:33,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2024-11-09 04:53:33,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.1125) internal successors, (178), 160 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:53:33,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 178 transitions. [2024-11-09 04:53:33,951 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 178 transitions. Word has length 95 [2024-11-09 04:53:33,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:53:33,951 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 178 transitions. [2024-11-09 04:53:33,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.0408163265306123) internal successors, (149), 49 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:53:33,951 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 178 transitions. [2024-11-09 04:53:33,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-09 04:53:33,952 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:53:33,952 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:53:33,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-09 04:53:34,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:53:34,153 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:53:34,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:53:34,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1834183634, now seen corresponding path program 23 times [2024-11-09 04:53:34,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:53:34,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725723317] [2024-11-09 04:53:34,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:53:34,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:53:34,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:53:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 145 proven. 341 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:53:35,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:53:35,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725723317] [2024-11-09 04:53:35,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725723317] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:53:35,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034130763] [2024-11-09 04:53:35,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:53:35,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:53:35,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:53:35,582 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:53:35,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-09 04:53:36,149 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-09 04:53:36,149 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:53:36,153 INFO L255 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-11-09 04:53:36,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:53:36,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 04:53:37,090 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 187 proven. 299 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:53:37,090 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:53:38,610 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 187 proven. 299 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:53:38,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034130763] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:53:38,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [718658455] [2024-11-09 04:53:38,612 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:53:38,612 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:53:38,612 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:53:38,612 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:53:38,612 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:53:39,101 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:53:40,955 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18275#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:53:40,955 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:53:40,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:53:40,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 85 [2024-11-09 04:53:40,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178325716] [2024-11-09 04:53:40,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:53:40,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-11-09 04:53:40,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:53:40,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-11-09 04:53:40,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1099, Invalid=9203, Unknown=0, NotChecked=0, Total=10302 [2024-11-09 04:53:40,958 INFO L87 Difference]: Start difference. First operand 161 states and 178 transitions. Second operand has 86 states, 85 states have (on average 3.4) internal successors, (289), 86 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:53:42,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:53:42,668 INFO L93 Difference]: Finished difference Result 181 states and 200 transitions. [2024-11-09 04:53:42,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-09 04:53:42,669 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 3.4) internal successors, (289), 86 states have internal predecessors, (289), 0 states have call successors, (0), 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 98 [2024-11-09 04:53:42,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:53:42,670 INFO L225 Difference]: With dead ends: 181 [2024-11-09 04:53:42,670 INFO L226 Difference]: Without dead ends: 181 [2024-11-09 04:53:42,671 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5349 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1442, Invalid=12130, Unknown=0, NotChecked=0, Total=13572 [2024-11-09 04:53:42,671 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 153 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 2262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:53:42,672 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 740 Invalid, 2262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 04:53:42,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-11-09 04:53:42,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 165. [2024-11-09 04:53:42,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.1158536585365855) internal successors, (183), 164 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:53:42,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 183 transitions. [2024-11-09 04:53:42,681 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 183 transitions. Word has length 98 [2024-11-09 04:53:42,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:53:42,681 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 183 transitions. [2024-11-09 04:53:42,684 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 3.4) internal successors, (289), 86 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:53:42,687 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 183 transitions. [2024-11-09 04:53:42,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-09 04:53:42,687 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:53:42,687 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:53:42,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-09 04:53:42,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:53:42,888 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:53:42,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:53:42,888 INFO L85 PathProgramCache]: Analyzing trace with hash 2110252183, now seen corresponding path program 24 times [2024-11-09 04:53:42,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:53:42,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98392701] [2024-11-09 04:53:42,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:53:42,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:53:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:53:44,357 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 37 proven. 498 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:53:44,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:53:44,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98392701] [2024-11-09 04:53:44,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98392701] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:53:44,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283099164] [2024-11-09 04:53:44,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:53:44,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:53:44,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:53:44,361 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:53:44,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-09 04:53:44,601 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:53:44,602 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:53:44,605 INFO L255 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 139 conjuncts are in the unsatisfiable core [2024-11-09 04:53:44,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:53:45,035 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 13 treesize of output 9 [2024-11-09 04:53:45,180 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 04:53:45,181 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 37 proven. 498 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:53:45,181 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:53:45,265 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 04:53:45,267 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 04:53:45,392 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 37 proven. 498 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:53:45,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283099164] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:53:45,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2050852828] [2024-11-09 04:53:45,394 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:53:45,394 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:53:45,394 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:53:45,394 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:53:45,394 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:53:45,833 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:53:47,491 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19325#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:53:47,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:53:47,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:53:47,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 52 [2024-11-09 04:53:47,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778693975] [2024-11-09 04:53:47,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:53:47,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-09 04:53:47,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:53:47,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-09 04:53:47,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=4343, Unknown=0, NotChecked=0, Total=4556 [2024-11-09 04:53:47,493 INFO L87 Difference]: Start difference. First operand 165 states and 183 transitions. Second operand has 52 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 52 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:53:49,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:53:49,631 INFO L93 Difference]: Finished difference Result 263 states and 295 transitions. [2024-11-09 04:53:49,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-09 04:53:49,631 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 52 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2024-11-09 04:53:49,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:53:49,632 INFO L225 Difference]: With dead ends: 263 [2024-11-09 04:53:49,633 INFO L226 Difference]: Without dead ends: 175 [2024-11-09 04:53:49,633 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2238 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=382, Invalid=8548, Unknown=0, NotChecked=0, Total=8930 [2024-11-09 04:53:49,633 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 189 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 3122 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 3134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 3122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:53:49,633 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 940 Invalid, 3134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 3122 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-09 04:53:49,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-09 04:53:49,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2024-11-09 04:53:49,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.111764705882353) internal successors, (189), 170 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:53:49,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 189 transitions. [2024-11-09 04:53:49,637 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 189 transitions. Word has length 102 [2024-11-09 04:53:49,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:53:49,637 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 189 transitions. [2024-11-09 04:53:49,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 52 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:53:49,637 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 189 transitions. [2024-11-09 04:53:49,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-11-09 04:53:49,638 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:53:49,638 INFO L215 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:53:49,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-09 04:53:49,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:53:49,839 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:53:49,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:53:49,839 INFO L85 PathProgramCache]: Analyzing trace with hash -552089731, now seen corresponding path program 25 times [2024-11-09 04:53:49,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:53:49,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839268620] [2024-11-09 04:53:49,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:53:49,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:53:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:53:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 176 proven. 396 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:53:51,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:53:51,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839268620] [2024-11-09 04:53:51,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839268620] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:53:51,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489576822] [2024-11-09 04:53:51,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:53:51,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:53:51,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:53:51,635 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:53:51,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-09 04:53:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:53:51,916 INFO L255 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 129 conjuncts are in the unsatisfiable core [2024-11-09 04:53:51,921 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:53:52,639 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 210 proven. 362 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:53:52,639 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:53:53,484 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 04:53:53,877 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 210 proven. 362 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:53:53,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489576822] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:53:53,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2040106924] [2024-11-09 04:53:53,878 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:53:53,878 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:53:53,879 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:53:53,879 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:53:53,879 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:53:54,340 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:53:56,021 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20518#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:53:56,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:53:56,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:53:56,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 64 [2024-11-09 04:53:56,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036477126] [2024-11-09 04:53:56,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:53:56,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-09 04:53:56,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:53:56,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-09 04:53:56,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=5908, Unknown=0, NotChecked=0, Total=6480 [2024-11-09 04:53:56,024 INFO L87 Difference]: Start difference. First operand 171 states and 189 transitions. Second operand has 65 states, 64 states have (on average 3.40625) internal successors, (218), 65 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:53:57,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:53:57,726 INFO L93 Difference]: Finished difference Result 192 states and 212 transitions. [2024-11-09 04:53:57,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-09 04:53:57,726 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 3.40625) internal successors, (218), 65 states have internal predecessors, (218), 0 states have call successors, (0), 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 105 [2024-11-09 04:53:57,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:53:57,727 INFO L225 Difference]: With dead ends: 192 [2024-11-09 04:53:57,727 INFO L226 Difference]: Without dead ends: 192 [2024-11-09 04:53:57,728 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 250 SyntacticMatches, 14 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4047 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=814, Invalid=8498, Unknown=0, NotChecked=0, Total=9312 [2024-11-09 04:53:57,728 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 245 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 2400 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 2401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:53:57,728 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 722 Invalid, 2401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2400 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 04:53:57,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-11-09 04:53:57,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 175. [2024-11-09 04:53:57,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.1149425287356323) internal successors, (194), 174 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:53:57,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 194 transitions. [2024-11-09 04:53:57,731 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 194 transitions. Word has length 105 [2024-11-09 04:53:57,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:53:57,732 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 194 transitions. [2024-11-09 04:53:57,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 3.40625) internal successors, (218), 65 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:53:57,732 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 194 transitions. [2024-11-09 04:53:57,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-09 04:53:57,733 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:53:57,733 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:53:57,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-09 04:53:57,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:53:57,933 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:53:57,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:53:57,934 INFO L85 PathProgramCache]: Analyzing trace with hash 2035315394, now seen corresponding path program 26 times [2024-11-09 04:53:57,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:53:57,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701791375] [2024-11-09 04:53:57,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:53:57,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:53:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:53:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 40 proven. 585 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:53:59,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:53:59,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701791375] [2024-11-09 04:53:59,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701791375] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:53:59,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813637851] [2024-11-09 04:53:59,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:53:59,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:53:59,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:53:59,629 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:53:59,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-09 04:54:00,437 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-11-09 04:54:00,437 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:54:00,442 INFO L255 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 116 conjuncts are in the unsatisfiable core [2024-11-09 04:54:00,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:54:00,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 04:54:00,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-09 04:54:08,992 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:54:08,992 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 32 treesize of output 29 [2024-11-09 04:54:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 222 proven. 403 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:54:09,245 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:54:11,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-09 04:54:11,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-09 04:54:13,044 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 222 proven. 403 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:54:13,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813637851] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:54:13,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1987374112] [2024-11-09 04:54:13,045 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:54:13,045 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:54:13,045 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:54:13,045 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:54:13,045 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:54:13,460 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:54:17,483 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21682#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:54:17,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:54:17,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:54:17,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 101 [2024-11-09 04:54:17,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62363693] [2024-11-09 04:54:17,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:54:17,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2024-11-09 04:54:17,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:54:17,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2024-11-09 04:54:17,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1090, Invalid=12480, Unknown=2, NotChecked=0, Total=13572 [2024-11-09 04:54:17,489 INFO L87 Difference]: Start difference. First operand 175 states and 194 transitions. Second operand has 101 states, 101 states have (on average 3.1881188118811883) internal successors, (322), 101 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:54:35,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:54:49,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:55:18,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:55:18,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:55:18,819 INFO L93 Difference]: Finished difference Result 300 states and 336 transitions. [2024-11-09 04:55:18,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-09 04:55:18,819 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.1881188118811883) internal successors, (322), 101 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2024-11-09 04:55:18,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:55:18,820 INFO L225 Difference]: With dead ends: 300 [2024-11-09 04:55:18,820 INFO L226 Difference]: Without dead ends: 207 [2024-11-09 04:55:18,823 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8275 ImplicationChecksByTransitivity, 68.0s TimeCoverageRelationStatistics Valid=2360, Invalid=21816, Unknown=4, NotChecked=0, Total=24180 [2024-11-09 04:55:18,823 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 835 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 3095 mSolverCounterSat, 30 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 3129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 3095 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2024-11-09 04:55:18,824 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [835 Valid, 747 Invalid, 3129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 3095 Invalid, 4 Unknown, 0 Unchecked, 8.8s Time] [2024-11-09 04:55:18,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-11-09 04:55:18,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 185. [2024-11-09 04:55:18,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.1141304347826086) internal successors, (205), 184 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:55:18,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 205 transitions. [2024-11-09 04:55:18,828 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 205 transitions. Word has length 109 [2024-11-09 04:55:18,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:55:18,829 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 205 transitions. [2024-11-09 04:55:18,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.1881188118811883) internal successors, (322), 101 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:55:18,829 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 205 transitions. [2024-11-09 04:55:18,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-11-09 04:55:18,830 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:55:18,830 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:55:18,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-09 04:55:19,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-09 04:55:19,031 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:55:19,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:55:19,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1777427681, now seen corresponding path program 27 times [2024-11-09 04:55:19,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:55:19,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207338521] [2024-11-09 04:55:19,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:55:19,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:55:19,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:55:20,967 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 43 proven. 679 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:55:20,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:55:20,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207338521] [2024-11-09 04:55:20,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207338521] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:55:20,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81479638] [2024-11-09 04:55:20,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:55:20,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:55:20,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:55:20,969 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:55:20,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-09 04:55:21,247 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:55:21,247 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:55:21,251 INFO L255 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 155 conjuncts are in the unsatisfiable core [2024-11-09 04:55:21,256 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:55:21,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 04:55:22,060 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 43 proven. 679 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:55:22,060 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:55:22,166 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 04:55:22,171 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 04:55:22,337 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 43 proven. 679 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:55:22,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81479638] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:55:22,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [282807343] [2024-11-09 04:55:22,338 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:55:22,338 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:55:22,339 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:55:22,339 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:55:22,339 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:55:22,876 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:55:25,003 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23009#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:55:25,003 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:55:25,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:55:25,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 58 [2024-11-09 04:55:25,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387106238] [2024-11-09 04:55:25,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:55:25,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-09 04:55:25,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:55:25,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-09 04:55:25,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=5173, Unknown=0, NotChecked=0, Total=5402 [2024-11-09 04:55:25,005 INFO L87 Difference]: Start difference. First operand 185 states and 205 transitions. Second operand has 58 states, 58 states have (on average 3.086206896551724) internal successors, (179), 58 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 04:55:28,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:55:28,460 INFO L93 Difference]: Finished difference Result 293 states and 329 transitions. [2024-11-09 04:55:28,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-09 04:55:28,460 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.086206896551724) internal successors, (179), 58 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) Word has length 116 [2024-11-09 04:55:28,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:55:28,461 INFO L225 Difference]: With dead ends: 293 [2024-11-09 04:55:28,461 INFO L226 Difference]: Without dead ends: 195 [2024-11-09 04:55:28,462 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2703 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=422, Invalid=10498, Unknown=0, NotChecked=0, Total=10920 [2024-11-09 04:55:28,463 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 131 mSDsluCounter, 1266 mSDsCounter, 0 mSdLazyCounter, 4361 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 4375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 4361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:55:28,463 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 1302 Invalid, 4375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 4361 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-09 04:55:28,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-11-09 04:55:28,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 191. [2024-11-09 04:55:28,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.1105263157894736) internal successors, (211), 190 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:55:28,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 211 transitions. [2024-11-09 04:55:28,468 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 211 transitions. Word has length 116 [2024-11-09 04:55:28,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:55:28,468 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 211 transitions. [2024-11-09 04:55:28,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.086206896551724) internal successors, (179), 58 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 04:55:28,469 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 211 transitions. [2024-11-09 04:55:28,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-11-09 04:55:28,469 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:55:28,469 INFO L215 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:55:28,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-11-09 04:55:28,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-11-09 04:55:28,670 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:55:28,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:55:28,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1139752263, now seen corresponding path program 28 times [2024-11-09 04:55:28,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:55:28,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474260781] [2024-11-09 04:55:28,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:55:28,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:55:28,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:55:30,863 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 247 proven. 518 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:55:30,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:55:30,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474260781] [2024-11-09 04:55:30,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474260781] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:55:30,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2160671] [2024-11-09 04:55:30,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:55:30,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:55:30,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:55:30,864 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:55:30,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-09 04:55:31,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:55:31,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 147 conjuncts are in the unsatisfiable core [2024-11-09 04:55:31,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:55:32,245 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 287 proven. 478 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:55:32,245 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:55:33,624 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 04:55:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 766 backedges. 287 proven. 478 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:55:34,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2160671] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:55:34,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [752780463] [2024-11-09 04:55:34,207 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:55:34,207 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:55:34,207 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:55:34,207 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:55:34,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:55:34,689 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:55:36,953 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24352#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:55:36,953 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:55:36,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:55:36,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 35] total 72 [2024-11-09 04:55:36,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92801196] [2024-11-09 04:55:36,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:55:36,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-09 04:55:36,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:55:36,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-09 04:55:36,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=704, Invalid=7128, Unknown=0, NotChecked=0, Total=7832 [2024-11-09 04:55:36,955 INFO L87 Difference]: Start difference. First operand 191 states and 211 transitions. Second operand has 73 states, 72 states have (on average 3.4166666666666665) internal successors, (246), 73 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:55:39,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:55:39,776 INFO L93 Difference]: Finished difference Result 214 states and 236 transitions. [2024-11-09 04:55:39,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-09 04:55:39,777 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 3.4166666666666665) internal successors, (246), 73 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2024-11-09 04:55:39,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:55:39,778 INFO L225 Difference]: With dead ends: 214 [2024-11-09 04:55:39,778 INFO L226 Difference]: Without dead ends: 214 [2024-11-09 04:55:39,779 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 286 SyntacticMatches, 16 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5000 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=995, Invalid=10347, Unknown=0, NotChecked=0, Total=11342 [2024-11-09 04:55:39,779 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 266 mSDsluCounter, 1204 mSDsCounter, 0 mSdLazyCounter, 4136 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 1242 SdHoareTripleChecker+Invalid, 4137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:55:39,779 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 1242 Invalid, 4137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4136 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-09 04:55:39,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-11-09 04:55:39,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 195. [2024-11-09 04:55:39,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.1134020618556701) internal successors, (216), 194 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:55:39,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 216 transitions. [2024-11-09 04:55:39,784 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 216 transitions. Word has length 119 [2024-11-09 04:55:39,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:55:39,785 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 216 transitions. [2024-11-09 04:55:39,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 3.4166666666666665) internal successors, (246), 73 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:55:39,785 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 216 transitions. [2024-11-09 04:55:39,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-09 04:55:39,786 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:55:39,786 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:55:39,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-11-09 04:55:39,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-09 04:55:39,987 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:55:39,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:55:39,987 INFO L85 PathProgramCache]: Analyzing trace with hash 377746316, now seen corresponding path program 29 times [2024-11-09 04:55:39,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:55:39,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322313093] [2024-11-09 04:55:39,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:55:39,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:55:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:55:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 46 proven. 780 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:55:42,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:55:42,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322313093] [2024-11-09 04:55:42,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322313093] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:55:42,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005792812] [2024-11-09 04:55:42,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:55:42,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:55:42,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:55:42,042 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:55:42,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-09 04:55:44,098 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-09 04:55:44,098 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:55:44,107 INFO L255 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 165 conjuncts are in the unsatisfiable core [2024-11-09 04:55:44,119 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:55:45,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 04:55:45,401 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 46 proven. 780 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:55:45,401 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:55:45,594 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 04:55:45,597 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 04:55:45,879 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 46 proven. 780 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:55:45,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005792812] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:55:45,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1453935978] [2024-11-09 04:55:45,881 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:55:45,881 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:55:45,881 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:55:45,881 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:55:45,881 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:55:46,396 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:55:48,978 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25606#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:55:48,978 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:55:48,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:55:48,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 61 [2024-11-09 04:55:48,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960145375] [2024-11-09 04:55:48,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:55:48,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-09 04:55:48,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:55:48,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-09 04:55:48,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=5615, Unknown=0, NotChecked=0, Total=5852 [2024-11-09 04:55:48,981 INFO L87 Difference]: Start difference. First operand 195 states and 216 transitions. Second operand has 61 states, 61 states have (on average 3.081967213114754) internal successors, (188), 61 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:55:54,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:55:54,063 INFO L93 Difference]: Finished difference Result 308 states and 346 transitions. [2024-11-09 04:55:54,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-09 04:55:54,063 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.081967213114754) internal successors, (188), 61 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2024-11-09 04:55:54,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:55:54,064 INFO L225 Difference]: With dead ends: 308 [2024-11-09 04:55:54,064 INFO L226 Difference]: Without dead ends: 205 [2024-11-09 04:55:54,065 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2952 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=442, Invalid=11548, Unknown=0, NotChecked=0, Total=11990 [2024-11-09 04:55:54,065 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 137 mSDsluCounter, 1508 mSDsCounter, 0 mSdLazyCounter, 5113 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1546 SdHoareTripleChecker+Invalid, 5129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 5113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:55:54,065 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 1546 Invalid, 5129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 5113 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-09 04:55:54,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-09 04:55:54,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 201. [2024-11-09 04:55:54,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.11) internal successors, (222), 200 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:55:54,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 222 transitions. [2024-11-09 04:55:54,070 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 222 transitions. Word has length 123 [2024-11-09 04:55:54,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:55:54,071 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 222 transitions. [2024-11-09 04:55:54,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.081967213114754) internal successors, (188), 61 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:55:54,071 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 222 transitions. [2024-11-09 04:55:54,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-11-09 04:55:54,072 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:55:54,072 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:55:54,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-11-09 04:55:54,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-11-09 04:55:54,273 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:55:54,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:55:54,273 INFO L85 PathProgramCache]: Analyzing trace with hash -679805850, now seen corresponding path program 30 times [2024-11-09 04:55:54,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:55:54,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154574777] [2024-11-09 04:55:54,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:55:54,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:55:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:55:56,673 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 287 proven. 585 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:55:56,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:55:56,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154574777] [2024-11-09 04:55:56,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154574777] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:55:56,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243720979] [2024-11-09 04:55:56,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:55:56,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:55:56,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:55:56,675 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:55:56,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-09 04:55:57,053 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:55:57,054 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:55:57,058 INFO L255 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 154 conjuncts are in the unsatisfiable core [2024-11-09 04:55:57,066 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:55:58,261 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 330 proven. 542 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:55:58,262 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:55:59,740 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 04:56:00,463 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 330 proven. 542 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:56:00,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243720979] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:56:00,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [582201281] [2024-11-09 04:56:00,465 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:56:00,465 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:56:00,465 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:56:00,465 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:56:00,465 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:56:01,026 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:56:03,330 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27024#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:56:03,331 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:56:03,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:56:03,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 37] total 76 [2024-11-09 04:56:03,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238459963] [2024-11-09 04:56:03,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:56:03,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-11-09 04:56:03,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:56:03,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-11-09 04:56:03,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=7772, Unknown=0, NotChecked=0, Total=8556 [2024-11-09 04:56:03,334 INFO L87 Difference]: Start difference. First operand 201 states and 222 transitions. Second operand has 77 states, 76 states have (on average 3.4210526315789473) internal successors, (260), 77 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:06,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:56:06,379 INFO L93 Difference]: Finished difference Result 225 states and 248 transitions. [2024-11-09 04:56:06,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-09 04:56:06,380 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 3.4210526315789473) internal successors, (260), 77 states have internal predecessors, (260), 0 states have call successors, (0), 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 126 [2024-11-09 04:56:06,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:56:06,381 INFO L225 Difference]: With dead ends: 225 [2024-11-09 04:56:06,381 INFO L226 Difference]: Without dead ends: 225 [2024-11-09 04:56:06,382 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 304 SyntacticMatches, 17 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5540 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1101, Invalid=11331, Unknown=0, NotChecked=0, Total=12432 [2024-11-09 04:56:06,382 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 202 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 3863 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 3864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:06,382 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 1118 Invalid, 3864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3863 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-09 04:56:06,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-11-09 04:56:06,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 205. [2024-11-09 04:56:06,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.1127450980392157) internal successors, (227), 204 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:06,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 227 transitions. [2024-11-09 04:56:06,388 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 227 transitions. Word has length 126 [2024-11-09 04:56:06,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:56:06,388 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 227 transitions. [2024-11-09 04:56:06,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 3.4210526315789473) internal successors, (260), 77 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:06,389 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 227 transitions. [2024-11-09 04:56:06,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-09 04:56:06,390 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:06,390 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:56:06,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-11-09 04:56:06,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-09 04:56:06,590 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:56:06,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:06,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1909263147, now seen corresponding path program 31 times [2024-11-09 04:56:06,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:56:06,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059091115] [2024-11-09 04:56:06,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:06,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:56:06,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:08,877 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 49 proven. 888 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:56:08,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:56:08,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059091115] [2024-11-09 04:56:08,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059091115] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:56:08,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188866235] [2024-11-09 04:56:08,878 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:56:08,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:56:08,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:56:08,879 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:56:08,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-09 04:56:09,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:09,261 INFO L255 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 177 conjuncts are in the unsatisfiable core [2024-11-09 04:56:09,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:10,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 04:56:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 49 proven. 888 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:56:10,322 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:56:10,484 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 04:56:10,486 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 04:56:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 49 proven. 888 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:56:10,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188866235] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:56:10,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [321418143] [2024-11-09 04:56:10,692 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:56:10,692 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:56:10,693 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:56:10,693 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:56:10,693 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:56:11,207 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:56:13,590 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28346#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:56:13,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:56:13,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:56:13,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 64 [2024-11-09 04:56:13,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95533056] [2024-11-09 04:56:13,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:56:13,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-09 04:56:13,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:56:13,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-09 04:56:13,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=6075, Unknown=0, NotChecked=0, Total=6320 [2024-11-09 04:56:13,592 INFO L87 Difference]: Start difference. First operand 205 states and 227 transitions. Second operand has 64 states, 64 states have (on average 3.109375) internal successors, (199), 64 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:18,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:56:18,237 INFO L93 Difference]: Finished difference Result 323 states and 363 transitions. [2024-11-09 04:56:18,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-09 04:56:18,238 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.109375) internal successors, (199), 64 states have internal predecessors, (199), 0 states have call successors, (0), 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 130 [2024-11-09 04:56:18,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:56:18,239 INFO L225 Difference]: With dead ends: 323 [2024-11-09 04:56:18,239 INFO L226 Difference]: Without dead ends: 215 [2024-11-09 04:56:18,241 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3212 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=462, Invalid=12648, Unknown=0, NotChecked=0, Total=13110 [2024-11-09 04:56:18,241 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 249 mSDsluCounter, 1584 mSDsCounter, 0 mSdLazyCounter, 5696 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1624 SdHoareTripleChecker+Invalid, 5712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 5696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:18,242 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 1624 Invalid, 5712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 5696 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-11-09 04:56:18,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-11-09 04:56:18,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 211. [2024-11-09 04:56:18,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.1095238095238096) internal successors, (233), 210 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 233 transitions. [2024-11-09 04:56:18,247 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 233 transitions. Word has length 130 [2024-11-09 04:56:18,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:56:18,247 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 233 transitions. [2024-11-09 04:56:18,248 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.109375) internal successors, (199), 64 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:18,248 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 233 transitions. [2024-11-09 04:56:18,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-11-09 04:56:18,249 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:18,249 INFO L215 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:56:18,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-09 04:56:18,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:56:18,450 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:56:18,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:18,450 INFO L85 PathProgramCache]: Analyzing trace with hash 2082289937, now seen corresponding path program 32 times [2024-11-09 04:56:18,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:56:18,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899580135] [2024-11-09 04:56:18,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:18,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:56:18,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:21,028 INFO L134 CoverageAnalysis]: Checked inductivity of 987 backedges. 330 proven. 656 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:56:21,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:56:21,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899580135] [2024-11-09 04:56:21,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899580135] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:56:21,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625721660] [2024-11-09 04:56:21,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:56:21,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:56:21,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:56:21,030 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:56:21,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-09 04:56:22,405 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2024-11-09 04:56:22,405 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:56:22,412 INFO L255 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-11-09 04:56:22,420 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 987 backedges. 392 proven. 594 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:56:24,753 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:56:26,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-09 04:56:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 987 backedges. 392 proven. 594 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:56:27,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625721660] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:56:27,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [397492529] [2024-11-09 04:56:27,784 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:56:27,784 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:56:27,784 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:56:27,784 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:56:27,784 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:56:28,349 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:56:30,987 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29856#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:56:30,987 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:56:30,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:56:30,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39, 39] total 97 [2024-11-09 04:56:30,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893846537] [2024-11-09 04:56:30,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:56:30,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2024-11-09 04:56:30,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:56:30,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2024-11-09 04:56:30,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1504, Invalid=11378, Unknown=0, NotChecked=0, Total=12882 [2024-11-09 04:56:30,992 INFO L87 Difference]: Start difference. First operand 211 states and 233 transitions. Second operand has 98 states, 97 states have (on average 3.4948453608247423) internal successors, (339), 98 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:33,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:56:33,683 INFO L93 Difference]: Finished difference Result 236 states and 260 transitions. [2024-11-09 04:56:33,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-09 04:56:33,684 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 97 states have (on average 3.4948453608247423) internal successors, (339), 98 states have internal predecessors, (339), 0 states have call successors, (0), 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 133 [2024-11-09 04:56:33,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:56:33,685 INFO L225 Difference]: With dead ends: 236 [2024-11-09 04:56:33,685 INFO L226 Difference]: Without dead ends: 236 [2024-11-09 04:56:33,686 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 305 SyntacticMatches, 18 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8238 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=2049, Invalid=15773, Unknown=0, NotChecked=0, Total=17822 [2024-11-09 04:56:33,687 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 356 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 2575 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 2576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:33,687 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 992 Invalid, 2576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2575 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-09 04:56:33,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-11-09 04:56:33,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 215. [2024-11-09 04:56:33,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.1121495327102804) internal successors, (238), 214 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:33,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 238 transitions. [2024-11-09 04:56:33,693 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 238 transitions. Word has length 133 [2024-11-09 04:56:33,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:56:33,693 INFO L471 AbstractCegarLoop]: Abstraction has 215 states and 238 transitions. [2024-11-09 04:56:33,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 97 states have (on average 3.4948453608247423) internal successors, (339), 98 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:33,694 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 238 transitions. [2024-11-09 04:56:33,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-09 04:56:33,695 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:33,695 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:56:33,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-11-09 04:56:33,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:56:33,896 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:56:33,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:33,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1281030742, now seen corresponding path program 33 times [2024-11-09 04:56:33,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:56:33,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804812220] [2024-11-09 04:56:33,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:33,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:56:33,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:37,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 52 proven. 1003 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:56:37,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:56:37,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804812220] [2024-11-09 04:56:37,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804812220] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:56:37,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750314111] [2024-11-09 04:56:37,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:56:37,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:56:37,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:56:37,112 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:56:37,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-09 04:56:37,509 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:56:37,509 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:56:37,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 185 conjuncts are in the unsatisfiable core [2024-11-09 04:56:37,522 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:38,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 04:56:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 52 proven. 1003 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:56:38,767 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:56:38,927 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 04:56:38,931 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 04:56:39,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 52 proven. 1003 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:56:39,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750314111] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:56:39,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [401954464] [2024-11-09 04:56:39,243 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:56:39,244 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:56:39,244 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:56:39,244 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:56:39,244 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:56:39,967 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:56:42,774 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31246#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:56:42,774 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:56:42,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:56:42,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 67 [2024-11-09 04:56:42,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080607840] [2024-11-09 04:56:42,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:56:42,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-09 04:56:42,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:56:42,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-09 04:56:42,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=6553, Unknown=0, NotChecked=0, Total=6806 [2024-11-09 04:56:42,777 INFO L87 Difference]: Start difference. First operand 215 states and 238 transitions. Second operand has 67 states, 67 states have (on average 3.1194029850746268) internal successors, (209), 67 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:48,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:56:48,517 INFO L93 Difference]: Finished difference Result 338 states and 380 transitions. [2024-11-09 04:56:48,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-09 04:56:48,518 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.1194029850746268) internal successors, (209), 67 states have internal predecessors, (209), 0 states have call successors, (0), 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 137 [2024-11-09 04:56:48,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:56:48,519 INFO L225 Difference]: With dead ends: 338 [2024-11-09 04:56:48,519 INFO L226 Difference]: Without dead ends: 225 [2024-11-09 04:56:48,520 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3483 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=482, Invalid=13798, Unknown=0, NotChecked=0, Total=14280 [2024-11-09 04:56:48,520 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 154 mSDsluCounter, 1912 mSDsCounter, 0 mSdLazyCounter, 6512 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1954 SdHoareTripleChecker+Invalid, 6529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 6512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-11-09 04:56:48,520 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 1954 Invalid, 6529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 6512 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-11-09 04:56:48,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-11-09 04:56:48,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 221. [2024-11-09 04:56:48,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.1090909090909091) internal successors, (244), 220 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:48,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 244 transitions. [2024-11-09 04:56:48,524 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 244 transitions. Word has length 137 [2024-11-09 04:56:48,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:56:48,524 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 244 transitions. [2024-11-09 04:56:48,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.1194029850746268) internal successors, (209), 67 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:56:48,525 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 244 transitions. [2024-11-09 04:56:48,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-11-09 04:56:48,526 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:56:48,526 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:56:48,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-09 04:56:48,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-11-09 04:56:48,727 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:56:48,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:56:48,727 INFO L85 PathProgramCache]: Analyzing trace with hash -247693904, now seen corresponding path program 34 times [2024-11-09 04:56:48,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:56:48,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028580827] [2024-11-09 04:56:48,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:56:48,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:56:48,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:51,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 376 proven. 731 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:56:51,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:56:51,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028580827] [2024-11-09 04:56:51,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028580827] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:56:51,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486217902] [2024-11-09 04:56:51,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:56:51,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:56:51,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:56:51,706 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:56:51,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-09 04:56:52,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:56:52,157 INFO L255 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 174 conjuncts are in the unsatisfiable core [2024-11-09 04:56:52,165 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:56:53,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 425 proven. 682 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:56:53,605 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:56:55,367 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 04:56:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 425 proven. 682 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:56:56,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486217902] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:56:56,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [539918326] [2024-11-09 04:56:56,273 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:56:56,273 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:56:56,274 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:56:56,274 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:56:56,274 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:56:57,000 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:56:59,721 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32814#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:56:59,721 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:56:59,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:56:59,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41, 41] total 84 [2024-11-09 04:56:59,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089564366] [2024-11-09 04:56:59,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:56:59,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-11-09 04:56:59,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:56:59,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-11-09 04:56:59,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=940, Invalid=9160, Unknown=0, NotChecked=0, Total=10100 [2024-11-09 04:56:59,724 INFO L87 Difference]: Start difference. First operand 221 states and 244 transitions. Second operand has 85 states, 84 states have (on average 3.4285714285714284) internal successors, (288), 85 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:57:03,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:57:03,664 INFO L93 Difference]: Finished difference Result 247 states and 272 transitions. [2024-11-09 04:57:03,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-09 04:57:03,665 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 3.4285714285714284) internal successors, (288), 85 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2024-11-09 04:57:03,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:57:03,666 INFO L225 Difference]: With dead ends: 247 [2024-11-09 04:57:03,666 INFO L226 Difference]: Without dead ends: 247 [2024-11-09 04:57:03,667 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 340 SyntacticMatches, 19 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6647 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1312, Invalid=13450, Unknown=0, NotChecked=0, Total=14762 [2024-11-09 04:57:03,667 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 386 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 4274 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 4275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-09 04:57:03,668 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 1256 Invalid, 4275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4274 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-09 04:57:03,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-11-09 04:57:03,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 225. [2024-11-09 04:57:03,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.1116071428571428) internal successors, (249), 224 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:57:03,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 249 transitions. [2024-11-09 04:57:03,674 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 249 transitions. Word has length 140 [2024-11-09 04:57:03,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:57:03,674 INFO L471 AbstractCegarLoop]: Abstraction has 225 states and 249 transitions. [2024-11-09 04:57:03,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 84 states have (on average 3.4285714285714284) internal successors, (288), 85 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:57:03,675 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 249 transitions. [2024-11-09 04:57:03,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-09 04:57:03,676 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:57:03,676 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:57:03,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-09 04:57:03,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-11-09 04:57:03,880 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:57:03,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:57:03,881 INFO L85 PathProgramCache]: Analyzing trace with hash -520562827, now seen corresponding path program 35 times [2024-11-09 04:57:03,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:57:03,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347197002] [2024-11-09 04:57:03,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:57:03,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:57:03,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:57:07,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 55 proven. 1125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:57:07,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:57:07,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347197002] [2024-11-09 04:57:07,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347197002] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:57:07,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364974184] [2024-11-09 04:57:07,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:57:07,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:57:07,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:57:07,567 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:57:07,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-09 04:57:09,842 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2024-11-09 04:57:09,842 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:57:09,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 197 conjuncts are in the unsatisfiable core [2024-11-09 04:57:09,858 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:57:11,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 04:57:11,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 55 proven. 1125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:57:11,349 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:57:11,524 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 04:57:11,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-09 04:57:11,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 55 proven. 1125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:57:11,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364974184] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:57:11,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1597511400] [2024-11-09 04:57:11,776 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:57:11,776 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:57:11,777 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:57:11,777 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:57:11,777 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:57:12,570 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:57:15,647 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34272#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:57:15,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:57:15,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:57:15,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 70 [2024-11-09 04:57:15,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080551038] [2024-11-09 04:57:15,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:57:15,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-09 04:57:15,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:57:15,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-09 04:57:15,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=7049, Unknown=0, NotChecked=0, Total=7310 [2024-11-09 04:57:15,649 INFO L87 Difference]: Start difference. First operand 225 states and 249 transitions. Second operand has 70 states, 70 states have (on average 3.1142857142857143) internal successors, (218), 70 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:57:22,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:57:22,050 INFO L93 Difference]: Finished difference Result 353 states and 397 transitions. [2024-11-09 04:57:22,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-09 04:57:22,051 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.1142857142857143) internal successors, (218), 70 states have internal predecessors, (218), 0 states have call successors, (0), 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 144 [2024-11-09 04:57:22,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:57:22,052 INFO L225 Difference]: With dead ends: 353 [2024-11-09 04:57:22,053 INFO L226 Difference]: Without dead ends: 235 [2024-11-09 04:57:22,053 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 390 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3765 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=502, Invalid=14998, Unknown=0, NotChecked=0, Total=15500 [2024-11-09 04:57:22,054 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 162 mSDsluCounter, 2048 mSDsCounter, 0 mSdLazyCounter, 6927 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 2092 SdHoareTripleChecker+Invalid, 6946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 6927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:57:22,054 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 2092 Invalid, 6946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 6927 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2024-11-09 04:57:22,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-11-09 04:57:22,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 231. [2024-11-09 04:57:22,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.108695652173913) internal successors, (255), 230 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:57:22,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 255 transitions. [2024-11-09 04:57:22,058 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 255 transitions. Word has length 144 [2024-11-09 04:57:22,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:57:22,058 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 255 transitions. [2024-11-09 04:57:22,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.1142857142857143) internal successors, (218), 70 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:57:22,059 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 255 transitions. [2024-11-09 04:57:22,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2024-11-09 04:57:22,060 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:57:22,060 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:57:22,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-11-09 04:57:22,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-11-09 04:57:22,261 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:57:22,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:57:22,261 INFO L85 PathProgramCache]: Analyzing trace with hash -333989157, now seen corresponding path program 36 times [2024-11-09 04:57:22,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:57:22,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337856973] [2024-11-09 04:57:22,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:57:22,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:57:22,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:57:26,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 425 proven. 810 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:57:26,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:57:26,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337856973] [2024-11-09 04:57:26,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337856973] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:57:26,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59818674] [2024-11-09 04:57:26,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:57:26,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:57:26,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:57:26,065 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:57:26,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-09 04:57:26,509 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:57:26,509 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:57:26,514 INFO L255 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 181 conjuncts are in the unsatisfiable core [2024-11-09 04:57:26,522 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:57:28,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 477 proven. 758 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:57:28,462 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:57:30,501 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 04:57:31,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 477 proven. 758 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:57:31,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59818674] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:57:31,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2032377315] [2024-11-09 04:57:31,454 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:57:31,454 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:57:31,454 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:57:31,455 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:57:31,455 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:57:32,098 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:57:34,982 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35915#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:57:34,982 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:57:34,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:57:34,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 43, 43] total 88 [2024-11-09 04:57:34,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654607923] [2024-11-09 04:57:34,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:57:34,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2024-11-09 04:57:34,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:57:34,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2024-11-09 04:57:34,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1024, Invalid=9896, Unknown=0, NotChecked=0, Total=10920 [2024-11-09 04:57:34,985 INFO L87 Difference]: Start difference. First operand 231 states and 255 transitions. Second operand has 89 states, 88 states have (on average 3.4318181818181817) internal successors, (302), 89 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:57:39,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:57:39,120 INFO L93 Difference]: Finished difference Result 258 states and 284 transitions. [2024-11-09 04:57:39,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-09 04:57:39,121 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 88 states have (on average 3.4318181818181817) internal successors, (302), 89 states have internal predecessors, (302), 0 states have call successors, (0), 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 147 [2024-11-09 04:57:39,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:57:39,122 INFO L225 Difference]: With dead ends: 258 [2024-11-09 04:57:39,123 INFO L226 Difference]: Without dead ends: 258 [2024-11-09 04:57:39,124 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 358 SyntacticMatches, 20 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7238 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1425, Invalid=14577, Unknown=0, NotChecked=0, Total=16002 [2024-11-09 04:57:39,124 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 513 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 4156 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 4157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:57:39,125 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 1327 Invalid, 4157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4156 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-11-09 04:57:39,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2024-11-09 04:57:39,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 235. [2024-11-09 04:57:39,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.1111111111111112) internal successors, (260), 234 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:57:39,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 260 transitions. [2024-11-09 04:57:39,131 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 260 transitions. Word has length 147 [2024-11-09 04:57:39,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:57:39,131 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 260 transitions. [2024-11-09 04:57:39,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 88 states have (on average 3.4318181818181817) internal successors, (302), 89 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:57:39,132 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 260 transitions. [2024-11-09 04:57:39,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2024-11-09 04:57:39,133 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:57:39,134 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:57:39,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-11-09 04:57:39,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2024-11-09 04:57:39,334 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:57:39,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:57:39,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1414235936, now seen corresponding path program 37 times [2024-11-09 04:57:39,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:57:39,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900834110] [2024-11-09 04:57:39,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:57:39,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:57:39,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:57:43,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 58 proven. 1254 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:57:43,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:57:43,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900834110] [2024-11-09 04:57:43,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900834110] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:57:43,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977457633] [2024-11-09 04:57:43,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:57:43,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:57:43,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:57:43,141 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:57:43,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-09 04:57:43,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:57:43,655 INFO L255 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 207 conjuncts are in the unsatisfiable core [2024-11-09 04:57:43,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:57:44,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 04:57:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 58 proven. 1254 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:57:45,260 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:57:45,496 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 04:57:45,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-11-09 04:57:45,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1313 backedges. 58 proven. 1254 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:57:45,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977457633] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:57:45,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [247421570] [2024-11-09 04:57:45,772 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:57:45,772 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:57:45,772 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:57:45,772 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:57:45,773 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:57:46,284 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:57:49,284 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37441#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:57:49,285 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:57:49,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:57:49,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 73 [2024-11-09 04:57:49,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333604042] [2024-11-09 04:57:49,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:57:49,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-11-09 04:57:49,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:57:49,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-11-09 04:57:49,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=7563, Unknown=0, NotChecked=0, Total=7832 [2024-11-09 04:57:49,287 INFO L87 Difference]: Start difference. First operand 235 states and 260 transitions. Second operand has 73 states, 73 states have (on average 3.136986301369863) internal successors, (229), 73 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:57:56,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:57:56,484 INFO L93 Difference]: Finished difference Result 368 states and 414 transitions. [2024-11-09 04:57:56,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-11-09 04:57:56,485 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.136986301369863) internal successors, (229), 73 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2024-11-09 04:57:56,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:57:56,490 INFO L225 Difference]: With dead ends: 368 [2024-11-09 04:57:56,491 INFO L226 Difference]: Without dead ends: 245 [2024-11-09 04:57:56,492 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4058 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=522, Invalid=16248, Unknown=0, NotChecked=0, Total=16770 [2024-11-09 04:57:56,493 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 173 mSDsluCounter, 2085 mSDsCounter, 0 mSdLazyCounter, 7534 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 2131 SdHoareTripleChecker+Invalid, 7553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 7534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-09 04:57:56,493 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 2131 Invalid, 7553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 7534 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-11-09 04:57:56,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-11-09 04:57:56,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 241. [2024-11-09 04:57:56,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.1083333333333334) internal successors, (266), 240 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 04:57:56,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 266 transitions. [2024-11-09 04:57:56,505 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 266 transitions. Word has length 151 [2024-11-09 04:57:56,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:57:56,505 INFO L471 AbstractCegarLoop]: Abstraction has 241 states and 266 transitions. [2024-11-09 04:57:56,506 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.136986301369863) internal successors, (229), 73 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:57:56,506 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 266 transitions. [2024-11-09 04:57:56,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2024-11-09 04:57:56,507 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:57:56,507 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:57:56,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-11-09 04:57:56,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-11-09 04:57:56,711 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:57:56,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:57:56,711 INFO L85 PathProgramCache]: Analyzing trace with hash 971973882, now seen corresponding path program 38 times [2024-11-09 04:57:56,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:57:56,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083360293] [2024-11-09 04:57:56,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:57:56,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:57:56,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:58:01,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 477 proven. 893 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:58:01,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:58:01,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083360293] [2024-11-09 04:58:01,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083360293] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:58:01,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822107189] [2024-11-09 04:58:01,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:58:01,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:58:01,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:58:01,349 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:58:01,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-09 04:58:03,477 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2024-11-09 04:58:03,477 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:58:03,485 INFO L255 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 154 conjuncts are in the unsatisfiable core [2024-11-09 04:58:03,494 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:58:06,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 551 proven. 819 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:58:06,563 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:58:09,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-09 04:58:10,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 551 proven. 819 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:58:10,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822107189] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:58:10,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1491602816] [2024-11-09 04:58:10,583 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:58:10,583 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:58:10,583 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:58:10,583 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:58:10,583 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:58:11,027 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:58:14,089 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39179#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:58:14,089 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:58:14,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:58:14,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 45, 45] total 112 [2024-11-09 04:58:14,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248798101] [2024-11-09 04:58:14,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:58:14,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2024-11-09 04:58:14,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:58:14,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2024-11-09 04:58:14,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1982, Invalid=14530, Unknown=0, NotChecked=0, Total=16512 [2024-11-09 04:58:14,093 INFO L87 Difference]: Start difference. First operand 241 states and 266 transitions. Second operand has 113 states, 112 states have (on average 3.5089285714285716) internal successors, (393), 113 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 04:58:18,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:58:18,115 INFO L93 Difference]: Finished difference Result 269 states and 296 transitions. [2024-11-09 04:58:18,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-09 04:58:18,115 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 112 states have (on average 3.5089285714285716) internal successors, (393), 113 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2024-11-09 04:58:18,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:58:18,117 INFO L225 Difference]: With dead ends: 269 [2024-11-09 04:58:18,117 INFO L226 Difference]: Without dead ends: 269 [2024-11-09 04:58:18,118 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 356 SyntacticMatches, 21 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10661 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=2680, Invalid=20272, Unknown=0, NotChecked=0, Total=22952 [2024-11-09 04:58:18,118 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 278 mSDsluCounter, 1270 mSDsCounter, 0 mSdLazyCounter, 3895 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 1318 SdHoareTripleChecker+Invalid, 3896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-09 04:58:18,119 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 1318 Invalid, 3896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3895 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-09 04:58:18,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2024-11-09 04:58:18,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 245. [2024-11-09 04:58:18,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.110655737704918) internal successors, (271), 244 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:58:18,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 271 transitions. [2024-11-09 04:58:18,124 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 271 transitions. Word has length 154 [2024-11-09 04:58:18,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:58:18,124 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 271 transitions. [2024-11-09 04:58:18,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 112 states have (on average 3.5089285714285716) internal successors, (393), 113 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 04:58:18,124 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 271 transitions. [2024-11-09 04:58:18,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2024-11-09 04:58:18,125 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:58:18,126 INFO L215 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:58:18,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-11-09 04:58:18,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-11-09 04:58:18,326 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:58:18,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:58:18,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1240282689, now seen corresponding path program 39 times [2024-11-09 04:58:18,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:58:18,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583430355] [2024-11-09 04:58:18,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:58:18,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:58:18,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:58:22,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 61 proven. 1390 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:58:22,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:58:22,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583430355] [2024-11-09 04:58:22,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583430355] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:58:22,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791527500] [2024-11-09 04:58:22,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 04:58:22,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:58:22,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:58:22,270 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:58:22,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-09 04:58:22,867 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 04:58:22,868 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:58:22,876 INFO L255 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 215 conjuncts are in the unsatisfiable core [2024-11-09 04:58:22,887 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:58:24,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 04:58:24,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 61 proven. 1390 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:58:24,665 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:58:24,859 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 04:58:24,861 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 04:58:25,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 61 proven. 1390 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:58:25,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791527500] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:58:25,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [879535928] [2024-11-09 04:58:25,131 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:58:25,131 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:58:25,131 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:58:25,131 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:58:25,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:58:25,910 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:58:29,372 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '40773#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:58:29,372 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:58:29,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:58:29,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 76 [2024-11-09 04:58:29,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080803031] [2024-11-09 04:58:29,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:58:29,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-09 04:58:29,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:58:29,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-09 04:58:29,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=8095, Unknown=0, NotChecked=0, Total=8372 [2024-11-09 04:58:29,374 INFO L87 Difference]: Start difference. First operand 245 states and 271 transitions. Second operand has 76 states, 76 states have (on average 3.1447368421052633) internal successors, (239), 76 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:58:35,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:58:35,821 INFO L93 Difference]: Finished difference Result 383 states and 431 transitions. [2024-11-09 04:58:35,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-09 04:58:35,821 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.1447368421052633) internal successors, (239), 76 states have internal predecessors, (239), 0 states have call successors, (0), 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 158 [2024-11-09 04:58:35,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:58:35,822 INFO L225 Difference]: With dead ends: 383 [2024-11-09 04:58:35,822 INFO L226 Difference]: Without dead ends: 255 [2024-11-09 04:58:35,824 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4362 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=542, Invalid=17548, Unknown=0, NotChecked=0, Total=18090 [2024-11-09 04:58:35,824 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 302 mSDsluCounter, 2414 mSDsCounter, 0 mSdLazyCounter, 8170 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 2462 SdHoareTripleChecker+Invalid, 8190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 8170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:58:35,824 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 2462 Invalid, 8190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 8170 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2024-11-09 04:58:35,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2024-11-09 04:58:35,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 251. [2024-11-09 04:58:35,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.108) internal successors, (277), 250 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:58:35,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 277 transitions. [2024-11-09 04:58:35,829 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 277 transitions. Word has length 158 [2024-11-09 04:58:35,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:58:35,830 INFO L471 AbstractCegarLoop]: Abstraction has 251 states and 277 transitions. [2024-11-09 04:58:35,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.1447368421052633) internal successors, (239), 76 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:58:35,830 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 277 transitions. [2024-11-09 04:58:35,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-11-09 04:58:35,831 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:58:35,831 INFO L215 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:58:35,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2024-11-09 04:58:36,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:58:36,036 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:58:36,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:58:36,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1364509349, now seen corresponding path program 40 times [2024-11-09 04:58:36,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:58:36,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182050572] [2024-11-09 04:58:36,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:58:36,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:58:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:58:39,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 532 proven. 980 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:58:39,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:58:39,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182050572] [2024-11-09 04:58:39,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182050572] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:58:39,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253432568] [2024-11-09 04:58:39,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 04:58:39,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:58:39,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:58:39,587 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:58:39,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-09 04:58:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:58:40,085 INFO L255 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 201 conjuncts are in the unsatisfiable core [2024-11-09 04:58:40,096 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:58:41,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 590 proven. 922 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:58:41,721 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:58:43,749 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 04:58:44,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 590 proven. 922 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:58:44,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253432568] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:58:44,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [900801950] [2024-11-09 04:58:44,798 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:58:44,798 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:58:44,798 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:58:44,798 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:58:44,799 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:58:45,269 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:58:47,845 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '42566#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:58:47,845 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:58:47,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:58:47,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 47, 47] total 96 [2024-11-09 04:58:47,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185200667] [2024-11-09 04:58:47,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:58:47,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-11-09 04:58:47,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:58:47,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-11-09 04:58:47,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1196, Invalid=11460, Unknown=0, NotChecked=0, Total=12656 [2024-11-09 04:58:47,848 INFO L87 Difference]: Start difference. First operand 251 states and 277 transitions. Second operand has 97 states, 96 states have (on average 3.4375) internal successors, (330), 97 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:58:52,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:58:52,102 INFO L93 Difference]: Finished difference Result 280 states and 308 transitions. [2024-11-09 04:58:52,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-09 04:58:52,103 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 96 states have (on average 3.4375) internal successors, (330), 97 states have internal predecessors, (330), 0 states have call successors, (0), 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 161 [2024-11-09 04:58:52,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:58:52,104 INFO L225 Difference]: With dead ends: 280 [2024-11-09 04:58:52,104 INFO L226 Difference]: Without dead ends: 280 [2024-11-09 04:58:52,105 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 394 SyntacticMatches, 22 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8459 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1658, Invalid=16974, Unknown=0, NotChecked=0, Total=18632 [2024-11-09 04:58:52,105 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 288 mSDsluCounter, 1509 mSDsCounter, 0 mSdLazyCounter, 5295 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 1559 SdHoareTripleChecker+Invalid, 5296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:58:52,105 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 1559 Invalid, 5296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5295 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-09 04:58:52,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2024-11-09 04:58:52,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 255. [2024-11-09 04:58:52,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.110236220472441) internal successors, (282), 254 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:58:52,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 282 transitions. [2024-11-09 04:58:52,110 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 282 transitions. Word has length 161 [2024-11-09 04:58:52,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:58:52,110 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 282 transitions. [2024-11-09 04:58:52,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 96 states have (on average 3.4375) internal successors, (330), 97 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:58:52,111 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 282 transitions. [2024-11-09 04:58:52,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2024-11-09 04:58:52,112 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:58:52,112 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:58:52,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-11-09 04:58:52,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:58:52,313 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 04:58:52,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:58:52,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1087085034, now seen corresponding path program 41 times [2024-11-09 04:58:52,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:58:52,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288175994] [2024-11-09 04:58:52,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:58:52,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:58:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:58:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 64 proven. 1533 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:58:55,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:58:55,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288175994] [2024-11-09 04:58:55,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288175994] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:58:55,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952679868] [2024-11-09 04:58:55,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:58:55,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:58:55,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:58:55,831 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:58:55,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-09 04:58:58,712 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2024-11-09 04:58:58,712 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:58:58,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 171 conjuncts are in the unsatisfiable core [2024-11-09 04:58:58,731 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:58:59,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-09 04:59:13,211 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:59:13,212 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 32 treesize of output 29 [2024-11-09 04:59:13,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 610 proven. 987 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:59:13,637 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:59:19,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-09 04:59:19,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-09 04:59:19,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-09 04:59:20,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 610 proven. 987 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 04:59:20,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952679868] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:59:20,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [784091919] [2024-11-09 04:59:20,819 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 04:59:20,819 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:59:20,819 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:59:20,819 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:59:20,820 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:59:21,418 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:59:25,800 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '44276#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 04:59:25,800 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:59:25,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:59:25,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 127 [2024-11-09 04:59:25,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972916228] [2024-11-09 04:59:25,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:59:25,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2024-11-09 04:59:25,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:59:25,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2024-11-09 04:59:25,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1616, Invalid=18689, Unknown=1, NotChecked=0, Total=20306 [2024-11-09 04:59:25,803 INFO L87 Difference]: Start difference. First operand 255 states and 282 transitions. Second operand has 127 states, 127 states have (on average 3.3307086614173227) internal successors, (423), 127 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:59:33,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 05:01:15,835 WARN L539 Checker$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 05:01:30,857 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 05:02:21,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:02:21,847 INFO L93 Difference]: Finished difference Result 428 states and 480 transitions. [2024-11-09 05:02:21,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-11-09 05:02:21,848 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 3.3307086614173227) internal successors, (423), 127 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2024-11-09 05:02:21,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:02:21,849 INFO L225 Difference]: With dead ends: 428 [2024-11-09 05:02:21,849 INFO L226 Difference]: Without dead ends: 295 [2024-11-09 05:02:21,851 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 380 SyntacticMatches, 22 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14334 ImplicationChecksByTransitivity, 190.2s TimeCoverageRelationStatistics Valid=4029, Invalid=34976, Unknown=1, NotChecked=0, Total=39006 [2024-11-09 05:02:21,851 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 1226 mSDsluCounter, 1682 mSDsCounter, 0 mSdLazyCounter, 6974 mSolverCounterSat, 44 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1226 SdHoareTripleChecker+Valid, 1731 SdHoareTripleChecker+Invalid, 7021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 6974 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2024-11-09 05:02:21,851 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1226 Valid, 1731 Invalid, 7021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 6974 Invalid, 3 Unknown, 0 Unchecked, 10.8s Time] [2024-11-09 05:02:21,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2024-11-09 05:02:21,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 265. [2024-11-09 05:02:21,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.1098484848484849) internal successors, (293), 264 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:02:21,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 293 transitions. [2024-11-09 05:02:21,856 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 293 transitions. Word has length 165 [2024-11-09 05:02:21,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:02:21,856 INFO L471 AbstractCegarLoop]: Abstraction has 265 states and 293 transitions. [2024-11-09 05:02:21,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 3.3307086614173227) internal successors, (423), 127 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:02:21,857 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 293 transitions. [2024-11-09 05:02:21,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2024-11-09 05:02:21,858 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:02:21,858 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:02:21,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-11-09 05:02:22,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:02:22,059 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 05:02:22,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:02:22,059 INFO L85 PathProgramCache]: Analyzing trace with hash -491199991, now seen corresponding path program 42 times [2024-11-09 05:02:22,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:02:22,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035008] [2024-11-09 05:02:22,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:02:22,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:02:22,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:02:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 67 proven. 1683 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:02:26,085 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:02:26,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035008] [2024-11-09 05:02:26,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035008] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:02:26,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391604720] [2024-11-09 05:02:26,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:02:26,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:02:26,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:02:26,087 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:02:26,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-09 05:02:26,626 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:02:26,627 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:02:26,635 INFO L255 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 235 conjuncts are in the unsatisfiable core [2024-11-09 05:02:26,645 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:02:28,257 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 05:02:28,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 67 proven. 1683 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:02:28,597 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:02:28,800 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 05:02:28,803 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 05:02:29,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 67 proven. 1683 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:02:29,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391604720] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:02:29,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [243229946] [2024-11-09 05:02:29,098 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 05:02:29,098 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:02:29,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:02:29,098 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:02:29,099 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:02:29,571 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:02:32,836 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '46203#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 05:02:32,836 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:02:32,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:02:32,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 82 [2024-11-09 05:02:32,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316545057] [2024-11-09 05:02:32,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:02:32,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-11-09 05:02:32,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:02:32,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-11-09 05:02:32,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=9213, Unknown=0, NotChecked=0, Total=9506 [2024-11-09 05:02:32,838 INFO L87 Difference]: Start difference. First operand 265 states and 293 transitions. Second operand has 82 states, 82 states have (on average 3.158536585365854) internal successors, (259), 82 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:02:41,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:02:41,339 INFO L93 Difference]: Finished difference Result 413 states and 465 transitions. [2024-11-09 05:02:41,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-11-09 05:02:41,340 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.158536585365854) internal successors, (259), 82 states have internal predecessors, (259), 0 states have call successors, (0), 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 172 [2024-11-09 05:02:41,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:02:41,341 INFO L225 Difference]: With dead ends: 413 [2024-11-09 05:02:41,341 INFO L226 Difference]: Without dead ends: 275 [2024-11-09 05:02:41,342 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5003 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=582, Invalid=20298, Unknown=0, NotChecked=0, Total=20880 [2024-11-09 05:02:41,343 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 334 mSDsluCounter, 2777 mSDsCounter, 0 mSdLazyCounter, 9670 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 2829 SdHoareTripleChecker+Invalid, 9692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 9670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:02:41,343 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 2829 Invalid, 9692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 9670 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2024-11-09 05:02:41,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2024-11-09 05:02:41,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 271. [2024-11-09 05:02:41,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.1074074074074074) internal successors, (299), 270 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:02:41,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 299 transitions. [2024-11-09 05:02:41,348 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 299 transitions. Word has length 172 [2024-11-09 05:02:41,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:02:41,348 INFO L471 AbstractCegarLoop]: Abstraction has 271 states and 299 transitions. [2024-11-09 05:02:41,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.158536585365854) internal successors, (259), 82 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:02:41,349 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 299 transitions. [2024-11-09 05:02:41,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2024-11-09 05:02:41,350 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:02:41,350 INFO L215 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:02:41,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-11-09 05:02:41,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:02:41,553 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 05:02:41,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:02:41,554 INFO L85 PathProgramCache]: Analyzing trace with hash -2109058961, now seen corresponding path program 43 times [2024-11-09 05:02:41,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:02:41,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139292041] [2024-11-09 05:02:41,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:02:41,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:02:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:02:46,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1818 backedges. 651 proven. 1166 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:02:46,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:02:46,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139292041] [2024-11-09 05:02:46,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139292041] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:02:46,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282877527] [2024-11-09 05:02:46,499 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:02:46,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:02:46,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:02:46,501 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:02:46,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-09 05:02:47,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:02:47,055 INFO L255 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 219 conjuncts are in the unsatisfiable core [2024-11-09 05:02:47,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:02:49,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1818 backedges. 715 proven. 1102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:02:49,155 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:02:51,706 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 05:02:53,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1818 backedges. 715 proven. 1102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:02:53,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282877527] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:02:53,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [301326070] [2024-11-09 05:02:53,257 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 05:02:53,257 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:02:53,257 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:02:53,257 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:02:53,258 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:02:53,736 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:02:56,838 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '48146#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 05:02:56,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:02:56,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:02:56,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 51, 51] total 104 [2024-11-09 05:02:56,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555246544] [2024-11-09 05:02:56,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:02:56,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2024-11-09 05:02:56,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:02:56,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2024-11-09 05:02:56,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1392, Invalid=13128, Unknown=0, NotChecked=0, Total=14520 [2024-11-09 05:02:56,841 INFO L87 Difference]: Start difference. First operand 271 states and 299 transitions. Second operand has 105 states, 104 states have (on average 3.4423076923076925) internal successors, (358), 105 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:03,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:03:03,024 INFO L93 Difference]: Finished difference Result 302 states and 332 transitions. [2024-11-09 05:03:03,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-09 05:03:03,025 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 104 states have (on average 3.4423076923076925) internal successors, (358), 105 states have internal predecessors, (358), 0 states have call successors, (0), 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 175 [2024-11-09 05:03:03,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:03:03,026 INFO L225 Difference]: With dead ends: 302 [2024-11-09 05:03:03,026 INFO L226 Difference]: Without dead ends: 302 [2024-11-09 05:03:03,027 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 430 SyntacticMatches, 24 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9812 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=1919, Invalid=19543, Unknown=0, NotChecked=0, Total=21462 [2024-11-09 05:03:03,027 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 515 mSDsluCounter, 1726 mSDsCounter, 0 mSdLazyCounter, 6151 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1780 SdHoareTripleChecker+Invalid, 6152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:03:03,027 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 1780 Invalid, 6152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6151 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-11-09 05:03:03,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2024-11-09 05:03:03,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 275. [2024-11-09 05:03:03,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.1094890510948905) internal successors, (304), 274 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:03,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 304 transitions. [2024-11-09 05:03:03,032 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 304 transitions. Word has length 175 [2024-11-09 05:03:03,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:03:03,032 INFO L471 AbstractCegarLoop]: Abstraction has 275 states and 304 transitions. [2024-11-09 05:03:03,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 104 states have (on average 3.4423076923076925) internal successors, (358), 105 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:03,032 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 304 transitions. [2024-11-09 05:03:03,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2024-11-09 05:03:03,033 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:03:03,033 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:03:03,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-09 05:03:03,234 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:03:03,234 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 05:03:03,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:03:03,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1118752076, now seen corresponding path program 44 times [2024-11-09 05:03:03,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:03:03,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430988077] [2024-11-09 05:03:03,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:03:03,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:03:03,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:03:07,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1911 backedges. 70 proven. 1840 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:03:07,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:03:07,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430988077] [2024-11-09 05:03:07,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430988077] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:03:07,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623395822] [2024-11-09 05:03:07,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:03:07,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:03:07,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:03:07,874 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:03:07,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-09 05:03:11,000 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2024-11-09 05:03:11,000 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:03:11,012 INFO L255 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 252 conjuncts are in the unsatisfiable core [2024-11-09 05:03:11,020 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:03:11,487 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 05:03:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1911 backedges. 70 proven. 1840 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:03:13,692 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:03:14,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-11-09 05:03:14,037 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 05:03:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1911 backedges. 70 proven. 1840 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:03:16,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623395822] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:03:16,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [834247242] [2024-11-09 05:03:16,140 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 05:03:16,140 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:03:16,140 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:03:16,141 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:03:16,141 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:03:16,636 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:03:20,339 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '49967#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 05:03:20,339 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:03:20,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:03:20,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 108 [2024-11-09 05:03:20,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937663383] [2024-11-09 05:03:20,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:03:20,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2024-11-09 05:03:20,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:03:20,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2024-11-09 05:03:20,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=14879, Unknown=0, NotChecked=0, Total=15252 [2024-11-09 05:03:20,342 INFO L87 Difference]: Start difference. First operand 275 states and 304 transitions. Second operand has 108 states, 108 states have (on average 3.324074074074074) internal successors, (359), 108 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:31,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:03:31,276 INFO L93 Difference]: Finished difference Result 428 states and 482 transitions. [2024-11-09 05:03:31,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-11-09 05:03:31,277 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 3.324074074074074) internal successors, (359), 108 states have internal predecessors, (359), 0 states have call successors, (0), 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 179 [2024-11-09 05:03:31,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:03:31,279 INFO L225 Difference]: With dead ends: 428 [2024-11-09 05:03:31,279 INFO L226 Difference]: Without dead ends: 285 [2024-11-09 05:03:31,280 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 637 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8318 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=688, Invalid=28724, Unknown=0, NotChecked=0, Total=29412 [2024-11-09 05:03:31,281 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 217 mSDsluCounter, 3488 mSDsCounter, 0 mSdLazyCounter, 12764 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 3542 SdHoareTripleChecker+Invalid, 12788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 12764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2024-11-09 05:03:31,281 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 3542 Invalid, 12788 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [24 Valid, 12764 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2024-11-09 05:03:31,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2024-11-09 05:03:31,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 281. [2024-11-09 05:03:31,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.1071428571428572) internal successors, (310), 280 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:31,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 310 transitions. [2024-11-09 05:03:31,285 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 310 transitions. Word has length 179 [2024-11-09 05:03:31,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:03:31,285 INFO L471 AbstractCegarLoop]: Abstraction has 281 states and 310 transitions. [2024-11-09 05:03:31,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 3.324074074074074) internal successors, (359), 108 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:31,286 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 310 transitions. [2024-11-09 05:03:31,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2024-11-09 05:03:31,287 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:03:31,287 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:03:31,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-11-09 05:03:31,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:03:31,488 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 05:03:31,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:03:31,488 INFO L85 PathProgramCache]: Analyzing trace with hash -845159026, now seen corresponding path program 45 times [2024-11-09 05:03:31,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:03:31,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783440553] [2024-11-09 05:03:31,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:03:31,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:03:31,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:03:36,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 715 proven. 1265 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:03:36,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:03:36,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783440553] [2024-11-09 05:03:36,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783440553] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:03:36,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039704866] [2024-11-09 05:03:36,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:03:36,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:03:36,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:03:36,742 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:03:36,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-09 05:03:37,276 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:03:37,276 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:03:37,282 INFO L255 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 226 conjuncts are in the unsatisfiable core [2024-11-09 05:03:37,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:03:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 782 proven. 1198 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:03:39,501 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:03:42,371 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 05:03:44,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 782 proven. 1198 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:03:44,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039704866] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:03:44,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [83180510] [2024-11-09 05:03:44,119 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 05:03:44,120 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:03:44,120 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:03:44,120 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:03:44,120 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:03:44,629 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:03:47,939 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '51983#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 05:03:47,940 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:03:47,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:03:47,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 53, 53] total 108 [2024-11-09 05:03:47,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125364417] [2024-11-09 05:03:47,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:03:47,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2024-11-09 05:03:47,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:03:47,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2024-11-09 05:03:47,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1496, Invalid=14004, Unknown=0, NotChecked=0, Total=15500 [2024-11-09 05:03:47,943 INFO L87 Difference]: Start difference. First operand 281 states and 310 transitions. Second operand has 109 states, 108 states have (on average 3.4444444444444446) internal successors, (372), 109 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:54,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:03:54,307 INFO L93 Difference]: Finished difference Result 313 states and 344 transitions. [2024-11-09 05:03:54,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-09 05:03:54,308 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 108 states have (on average 3.4444444444444446) internal successors, (372), 109 states have internal predecessors, (372), 0 states have call successors, (0), 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 182 [2024-11-09 05:03:54,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:03:54,309 INFO L225 Difference]: With dead ends: 313 [2024-11-09 05:03:54,309 INFO L226 Difference]: Without dead ends: 313 [2024-11-09 05:03:54,311 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 448 SyntacticMatches, 25 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10526 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=2057, Invalid=20895, Unknown=0, NotChecked=0, Total=22952 [2024-11-09 05:03:54,311 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 368 mSDsluCounter, 1990 mSDsCounter, 0 mSdLazyCounter, 6682 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 2046 SdHoareTripleChecker+Invalid, 6683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:03:54,311 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 2046 Invalid, 6683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6682 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2024-11-09 05:03:54,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2024-11-09 05:03:54,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 285. [2024-11-09 05:03:54,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.1091549295774648) internal successors, (315), 284 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:54,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 315 transitions. [2024-11-09 05:03:54,317 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 315 transitions. Word has length 182 [2024-11-09 05:03:54,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:03:54,318 INFO L471 AbstractCegarLoop]: Abstraction has 285 states and 315 transitions. [2024-11-09 05:03:54,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 108 states have (on average 3.4444444444444446) internal successors, (372), 109 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:03:54,318 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 315 transitions. [2024-11-09 05:03:54,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2024-11-09 05:03:54,319 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:03:54,320 INFO L215 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:03:54,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-09 05:03:54,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:03:54,520 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 05:03:54,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:03:54,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1953947565, now seen corresponding path program 46 times [2024-11-09 05:03:54,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:03:54,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517036251] [2024-11-09 05:03:54,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:03:54,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:03:54,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:03:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2078 backedges. 73 proven. 2004 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:03:59,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:03:59,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517036251] [2024-11-09 05:03:59,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517036251] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:03:59,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105484761] [2024-11-09 05:03:59,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 05:03:59,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:03:59,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:03:59,763 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:03:59,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-09 05:04:00,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:00,372 INFO L255 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 257 conjuncts are in the unsatisfiable core [2024-11-09 05:04:00,382 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:04:02,173 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 05:04:02,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2078 backedges. 73 proven. 2004 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:04:02,538 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:04:02,831 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 05:04:02,834 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 05:04:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2078 backedges. 73 proven. 2004 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:04:03,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105484761] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:04:03,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1572714898] [2024-11-09 05:04:03,154 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 05:04:03,154 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:04:03,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:04:03,154 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:04:03,154 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:04:03,643 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:04:07,023 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '53849#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 05:04:07,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:04:07,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:04:07,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 88 [2024-11-09 05:04:07,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444225250] [2024-11-09 05:04:07,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:04:07,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2024-11-09 05:04:07,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:04:07,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2024-11-09 05:04:07,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=10403, Unknown=0, NotChecked=0, Total=10712 [2024-11-09 05:04:07,026 INFO L87 Difference]: Start difference. First operand 285 states and 315 transitions. Second operand has 88 states, 88 states have (on average 3.1704545454545454) internal successors, (279), 88 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:04:17,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:04:17,649 INFO L93 Difference]: Finished difference Result 443 states and 499 transitions. [2024-11-09 05:04:17,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-11-09 05:04:17,650 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.1704545454545454) internal successors, (279), 88 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 186 [2024-11-09 05:04:17,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:04:17,651 INFO L225 Difference]: With dead ends: 443 [2024-11-09 05:04:17,651 INFO L226 Difference]: Without dead ends: 295 [2024-11-09 05:04:17,652 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 663 GetRequests, 510 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5688 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=622, Invalid=23248, Unknown=0, NotChecked=0, Total=23870 [2024-11-09 05:04:17,652 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 211 mSDsluCounter, 3598 mSDsCounter, 0 mSdLazyCounter, 12251 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 3654 SdHoareTripleChecker+Invalid, 12275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 12251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:04:17,652 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 3654 Invalid, 12275 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [24 Valid, 12251 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2024-11-09 05:04:17,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2024-11-09 05:04:17,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 291. [2024-11-09 05:04:17,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.106896551724138) internal successors, (321), 290 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:04:17,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 321 transitions. [2024-11-09 05:04:17,657 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 321 transitions. Word has length 186 [2024-11-09 05:04:17,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:04:17,657 INFO L471 AbstractCegarLoop]: Abstraction has 291 states and 321 transitions. [2024-11-09 05:04:17,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.1704545454545454) internal successors, (279), 88 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:04:17,658 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 321 transitions. [2024-11-09 05:04:17,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2024-11-09 05:04:17,659 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:04:17,659 INFO L215 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:04:17,686 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-11-09 05:04:17,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:17,860 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 05:04:17,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:04:17,860 INFO L85 PathProgramCache]: Analyzing trace with hash 778986553, now seen corresponding path program 47 times [2024-11-09 05:04:17,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:04:17,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558915692] [2024-11-09 05:04:17,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:17,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:04:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2151 backedges. 782 proven. 1368 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:04:22,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:22,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558915692] [2024-11-09 05:04:22,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558915692] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:04:22,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118037988] [2024-11-09 05:04:22,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:04:22,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:22,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:04:22,772 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:04:22,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-09 05:04:25,466 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2024-11-09 05:04:25,466 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:04:25,476 INFO L255 TraceCheckSpWp]: Trace formula consists of 951 conjuncts, 190 conjuncts are in the unsatisfiable core [2024-11-09 05:04:25,486 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:04:25,489 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 05:04:29,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2151 backedges. 876 proven. 1274 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:04:29,576 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:04:36,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2151 backedges. 876 proven. 1274 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:04:36,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118037988] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:04:36,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1942227374] [2024-11-09 05:04:36,228 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 05:04:36,228 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:04:36,228 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:04:36,229 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:04:36,229 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:04:36,891 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:04:40,626 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '55993#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 05:04:40,626 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:04:40,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:04:40,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 55, 55] total 163 [2024-11-09 05:04:40,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492337686] [2024-11-09 05:04:40,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:04:40,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2024-11-09 05:04:40,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:04:40,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2024-11-09 05:04:40,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3967, Invalid=28253, Unknown=0, NotChecked=0, Total=32220 [2024-11-09 05:04:40,631 INFO L87 Difference]: Start difference. First operand 291 states and 321 transitions. Second operand has 164 states, 163 states have (on average 3.4478527607361964) internal successors, (562), 164 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:04:45,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:04:45,849 INFO L93 Difference]: Finished difference Result 324 states and 356 transitions. [2024-11-09 05:04:45,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-09 05:04:45,850 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 163 states have (on average 3.4478527607361964) internal successors, (562), 164 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 189 [2024-11-09 05:04:45,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:04:45,852 INFO L225 Difference]: With dead ends: 324 [2024-11-09 05:04:45,852 INFO L226 Difference]: Without dead ends: 324 [2024-11-09 05:04:45,854 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17210 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=4986, Invalid=38070, Unknown=0, NotChecked=0, Total=43056 [2024-11-09 05:04:45,855 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 507 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 3821 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 1277 SdHoareTripleChecker+Invalid, 3822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-09 05:04:45,855 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 1277 Invalid, 3822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3821 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-09 05:04:45,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2024-11-09 05:04:45,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 295. [2024-11-09 05:04:45,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.1088435374149659) internal successors, (326), 294 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:04:45,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 326 transitions. [2024-11-09 05:04:45,860 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 326 transitions. Word has length 189 [2024-11-09 05:04:45,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:04:45,860 INFO L471 AbstractCegarLoop]: Abstraction has 295 states and 326 transitions. [2024-11-09 05:04:45,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 163 states have (on average 3.4478527607361964) internal successors, (562), 164 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:04:45,860 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 326 transitions. [2024-11-09 05:04:45,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2024-11-09 05:04:45,861 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:04:45,861 INFO L215 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:04:45,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2024-11-09 05:04:46,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:46,062 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 05:04:46,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:04:46,063 INFO L85 PathProgramCache]: Analyzing trace with hash -833465986, now seen corresponding path program 48 times [2024-11-09 05:04:46,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:04:46,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880461269] [2024-11-09 05:04:46,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:46,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:04:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2252 backedges. 76 proven. 2175 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:04:51,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:51,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880461269] [2024-11-09 05:04:51,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880461269] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:04:51,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875643066] [2024-11-09 05:04:51,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 05:04:51,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:51,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:04:51,256 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:04:51,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-09 05:04:51,924 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 05:04:51,924 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:04:51,931 INFO L255 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 269 conjuncts are in the unsatisfiable core [2024-11-09 05:04:51,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:04:53,938 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 05:04:54,395 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 05:04:54,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2252 backedges. 76 proven. 2175 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:04:54,397 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:04:54,629 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 05:04:54,631 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 05:04:54,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2252 backedges. 76 proven. 2175 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 05:04:54,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875643066] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:04:54,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [134323553] [2024-11-09 05:04:54,961 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 05:04:54,962 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:04:54,962 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:04:54,962 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:04:54,962 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:04:55,449 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:04:58,876 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '57927#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_cstrpbrk_~sc1~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_#t~malloc12#1.base|) (<= 2 |ULTIMATE.start_cstrpbrk_~sc1~0#1.base|) (= |ULTIMATE.start_cstrpbrk_~s2#1.offset| 0) (<= 2 |ULTIMATE.start_cstrpbrk_~s2#1.base|) (<= 2 |ULTIMATE.start_main_#t~malloc13#1.base|))' at error location [2024-11-09 05:04:58,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:04:58,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:04:58,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 91 [2024-11-09 05:04:58,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20489186] [2024-11-09 05:04:58,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:04:58,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2024-11-09 05:04:58,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:04:58,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2024-11-09 05:04:58,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=11025, Unknown=0, NotChecked=0, Total=11342 [2024-11-09 05:04:58,878 INFO L87 Difference]: Start difference. First operand 295 states and 326 transitions. Second operand has 91 states, 91 states have (on average 3.1758241758241756) internal successors, (289), 91 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:05:09,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:05:09,895 INFO L93 Difference]: Finished difference Result 458 states and 516 transitions. [2024-11-09 05:05:09,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2024-11-09 05:05:09,896 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.1758241758241756) internal successors, (289), 91 states have internal predecessors, (289), 0 states have call successors, (0), 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 193 [2024-11-09 05:05:09,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:05:09,897 INFO L225 Difference]: With dead ends: 458 [2024-11-09 05:05:09,897 INFO L226 Difference]: Without dead ends: 305 [2024-11-09 05:05:09,898 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 530 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6047 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=642, Invalid=24798, Unknown=0, NotChecked=0, Total=25440 [2024-11-09 05:05:09,899 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 222 mSDsluCounter, 3673 mSDsCounter, 0 mSdLazyCounter, 12610 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 3731 SdHoareTripleChecker+Invalid, 12635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 12610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:05:09,899 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 3731 Invalid, 12635 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [25 Valid, 12610 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2024-11-09 05:05:09,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2024-11-09 05:05:09,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 301. [2024-11-09 05:05:09,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.1066666666666667) internal successors, (332), 300 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:05:09,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 332 transitions. [2024-11-09 05:05:09,903 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 332 transitions. Word has length 193 [2024-11-09 05:05:09,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:05:09,903 INFO L471 AbstractCegarLoop]: Abstraction has 301 states and 332 transitions. [2024-11-09 05:05:09,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.1758241758241756) internal successors, (289), 91 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 05:05:09,904 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 332 transitions. [2024-11-09 05:05:09,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2024-11-09 05:05:09,905 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:05:09,905 INFO L215 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:05:09,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2024-11-09 05:05:10,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d501cbc4-54a8-441b-8d27-f8579b4edf73/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:05:10,106 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 05:05:10,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:05:10,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1390018264, now seen corresponding path program 49 times [2024-11-09 05:05:10,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:05:10,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570098085] [2024-11-09 05:05:10,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:05:10,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:05:10,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat