./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff 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_2b4a82b8-f962-4328-a3d7-1104d96be515/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4a82b8-f962-4328-a3d7-1104d96be515/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4a82b8-f962-4328-a3d7-1104d96be515/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4a82b8-f962-4328-a3d7-1104d96be515/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4a82b8-f962-4328-a3d7-1104d96be515/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4a82b8-f962-4328-a3d7-1104d96be515/bin/utaipan-verify-t7M7D8N6sZ --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 46bbe683d8965e9a855fbd780578b958a816bbdd25bc1fa0d6151e1b826f8669 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:05:45,334 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:05:45,423 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4a82b8-f962-4328-a3d7-1104d96be515/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-19 05:05:45,429 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:05:45,430 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:05:45,462 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:05:45,463 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:05:45,464 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:05:45,465 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:05:45,466 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:05:45,467 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:05:45,467 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:05:45,468 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:05:45,469 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:05:45,469 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:05:45,470 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:05:45,471 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:05:45,472 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:05:45,472 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:05:45,473 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:05:45,474 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:05:45,475 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:05:45,476 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 05:05:45,476 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 05:05:45,477 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:05:45,478 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:05:45,478 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:05:45,479 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:05:45,479 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:05:45,480 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 05:05:45,481 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 05:05:45,481 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 05:05:45,482 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:05:45,482 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 05:05:45,483 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 05:05:45,483 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:05:45,484 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:05:45,484 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:05:45,485 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:05:45,485 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:05:45,486 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:05:45,487 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:05:45,487 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:05:45,488 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:05:45,488 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:05:45,488 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:05:45,489 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_2b4a82b8-f962-4328-a3d7-1104d96be515/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4a82b8-f962-4328-a3d7-1104d96be515/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 46bbe683d8965e9a855fbd780578b958a816bbdd25bc1fa0d6151e1b826f8669 [2023-11-19 05:05:45,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:05:45,838 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:05:45,842 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:05:45,845 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:05:45,847 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:05:45,848 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4a82b8-f962-4328-a3d7-1104d96be515/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i [2023-11-19 05:05:49,582 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:05:50,078 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:05:50,084 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4a82b8-f962-4328-a3d7-1104d96be515/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i [2023-11-19 05:05:50,116 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4a82b8-f962-4328-a3d7-1104d96be515/bin/utaipan-verify-t7M7D8N6sZ/data/d6c3e2067/768714fdaee04e1e80be1ba0137a5c08/FLAG01a74a779 [2023-11-19 05:05:50,234 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4a82b8-f962-4328-a3d7-1104d96be515/bin/utaipan-verify-t7M7D8N6sZ/data/d6c3e2067/768714fdaee04e1e80be1ba0137a5c08 [2023-11-19 05:05:50,245 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:05:50,247 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:05:50,249 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:05:50,250 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:05:50,258 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:05:50,259 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:05:50" (1/1) ... [2023-11-19 05:05:50,260 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@655155fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:50, skipping insertion in model container [2023-11-19 05:05:50,261 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:05:50" (1/1) ... [2023-11-19 05:05:50,349 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:05:50,743 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:05:50,757 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:05:50,856 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:05:50,923 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:05:50,924 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:50 WrapperNode [2023-11-19 05:05:50,924 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:05:50,929 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:05:50,929 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:05:50,929 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:05:50,939 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:50" (1/1) ... [2023-11-19 05:05:50,964 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:50" (1/1) ... [2023-11-19 05:05:51,010 INFO L138 Inliner]: procedures = 127, calls = 39, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 122 [2023-11-19 05:05:51,011 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:05:51,012 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:05:51,012 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:05:51,012 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:05:51,026 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:50" (1/1) ... [2023-11-19 05:05:51,026 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:50" (1/1) ... [2023-11-19 05:05:51,032 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:50" (1/1) ... [2023-11-19 05:05:51,032 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:50" (1/1) ... [2023-11-19 05:05:51,047 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:50" (1/1) ... [2023-11-19 05:05:51,064 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:50" (1/1) ... [2023-11-19 05:05:51,077 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:50" (1/1) ... [2023-11-19 05:05:51,078 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:50" (1/1) ... [2023-11-19 05:05:51,080 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:05:51,081 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:05:51,082 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:05:51,082 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:05:51,083 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:50" (1/1) ... [2023-11-19 05:05:51,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:05:51,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4a82b8-f962-4328-a3d7-1104d96be515/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:05:51,131 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4a82b8-f962-4328-a3d7-1104d96be515/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:05:51,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4a82b8-f962-4328-a3d7-1104d96be515/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:05:51,177 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-11-19 05:05:51,177 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-11-19 05:05:51,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 05:05:51,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 05:05:51,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 05:05:51,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:05:51,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 05:05:51,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 05:05:51,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 05:05:51,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:05:51,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 05:05:51,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:05:51,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:05:51,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:05:51,346 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:05:51,349 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:05:51,392 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-11-19 05:05:51,839 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:05:51,915 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:05:51,915 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 05:05:51,921 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:05:51 BoogieIcfgContainer [2023-11-19 05:05:51,921 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:05:51,923 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:05:51,924 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:05:51,927 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:05:51,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:05:50" (1/3) ... [2023-11-19 05:05:51,928 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e0fd6bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:05:51, skipping insertion in model container [2023-11-19 05:05:51,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:05:50" (2/3) ... [2023-11-19 05:05:51,929 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e0fd6bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:05:51, skipping insertion in model container [2023-11-19 05:05:51,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:05:51" (3/3) ... [2023-11-19 05:05:51,931 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2n_prepend_equal.i [2023-11-19 05:05:51,951 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:05:51,951 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2023-11-19 05:05:52,001 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:05:52,010 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@45bd28d7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:05:52,010 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2023-11-19 05:05:52,016 INFO L276 IsEmpty]: Start isEmpty. Operand has 83 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 81 states have internal predecessors, (90), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:05:52,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-19 05:05:52,025 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:05:52,026 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-19 05:05:52,027 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-19 05:05:52,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:05:52,034 INFO L85 PathProgramCache]: Analyzing trace with hash 6391357, now seen corresponding path program 1 times [2023-11-19 05:05:52,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:05:52,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69163007] [2023-11-19 05:05:52,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:05:52,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:05:52,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:05:52,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:05:52,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:05:52,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69163007] [2023-11-19 05:05:52,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69163007] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:05:52,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:05:52,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:05:52,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901187147] [2023-11-19 05:05:52,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:05:52,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:05:52,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:05:52,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:05:52,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:05:52,533 INFO L87 Difference]: Start difference. First operand has 83 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 81 states have internal predecessors, (90), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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) [2023-11-19 05:05:52,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:05:52,749 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2023-11-19 05:05:52,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:05:52,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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 [2023-11-19 05:05:52,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:05:52,764 INFO L225 Difference]: With dead ends: 79 [2023-11-19 05:05:52,764 INFO L226 Difference]: Without dead ends: 74 [2023-11-19 05:05:52,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:05:52,774 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 12 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:05:52,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 96 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:05:52,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-19 05:05:52,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-11-19 05:05:52,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 73 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) [2023-11-19 05:05:52,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2023-11-19 05:05:52,830 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 4 [2023-11-19 05:05:52,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:05:52,831 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2023-11-19 05:05:52,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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) [2023-11-19 05:05:52,832 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2023-11-19 05:05:52,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-19 05:05:52,832 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:05:52,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-19 05:05:52,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:05:52,835 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-19 05:05:52,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:05:52,837 INFO L85 PathProgramCache]: Analyzing trace with hash 6391358, now seen corresponding path program 1 times [2023-11-19 05:05:52,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:05:52,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716902712] [2023-11-19 05:05:52,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:05:52,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:05:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:05:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:05:53,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:05:53,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716902712] [2023-11-19 05:05:53,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716902712] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:05:53,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:05:53,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:05:53,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824939593] [2023-11-19 05:05:53,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:05:53,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:05:53,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:05:53,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:05:53,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:05:53,018 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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) [2023-11-19 05:05:53,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:05:53,125 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2023-11-19 05:05:53,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:05:53,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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 [2023-11-19 05:05:53,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:05:53,132 INFO L225 Difference]: With dead ends: 71 [2023-11-19 05:05:53,132 INFO L226 Difference]: Without dead ends: 71 [2023-11-19 05:05:53,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:05:53,142 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 8 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:05:53,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 90 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:05:53,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-19 05:05:53,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-11-19 05:05:53,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 36 states have (on average 2.111111111111111) internal successors, (76), 70 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:05:53,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2023-11-19 05:05:53,153 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 4 [2023-11-19 05:05:53,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:05:53,153 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2023-11-19 05:05:53,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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) [2023-11-19 05:05:53,154 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2023-11-19 05:05:53,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-19 05:05:53,154 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:05:53,155 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-19 05:05:53,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:05:53,155 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-19 05:05:53,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:05:53,156 INFO L85 PathProgramCache]: Analyzing trace with hash 6557673, now seen corresponding path program 1 times [2023-11-19 05:05:53,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:05:53,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635549044] [2023-11-19 05:05:53,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:05:53,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:05:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:05:53,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:05:53,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:05:53,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635549044] [2023-11-19 05:05:53,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635549044] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:05:53,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:05:53,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:05:53,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543289763] [2023-11-19 05:05:53,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:05:53,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:05:53,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:05:53,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:05:53,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:05:53,241 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) 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) [2023-11-19 05:05:53,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:05:53,291 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2023-11-19 05:05:53,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:05:53,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) 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 [2023-11-19 05:05:53,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:05:53,294 INFO L225 Difference]: With dead ends: 81 [2023-11-19 05:05:53,294 INFO L226 Difference]: Without dead ends: 81 [2023-11-19 05:05:53,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:05:53,297 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 10 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:05:53,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 124 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:05:53,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-19 05:05:53,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2023-11-19 05:05:53,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 37 states have (on average 2.081081081081081) internal successors, (77), 71 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:05:53,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2023-11-19 05:05:53,309 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 4 [2023-11-19 05:05:53,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:05:53,310 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2023-11-19 05:05:53,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) 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) [2023-11-19 05:05:53,310 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2023-11-19 05:05:53,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 05:05:53,311 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:05:53,311 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:05:53,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:05:53,312 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-19 05:05:53,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:05:53,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1267254081, now seen corresponding path program 1 times [2023-11-19 05:05:53,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:05:53,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904313902] [2023-11-19 05:05:53,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:05:53,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:05:53,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:05:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:05:53,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:05:53,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904313902] [2023-11-19 05:05:53,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904313902] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:05:53,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:05:53,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:05:53,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783160145] [2023-11-19 05:05:53,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:05:53,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:05:53,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:05:53,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:05:53,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:05:53,421 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:05:53,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:05:53,482 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2023-11-19 05:05:53,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:05:53,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-19 05:05:53,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:05:53,485 INFO L225 Difference]: With dead ends: 78 [2023-11-19 05:05:53,485 INFO L226 Difference]: Without dead ends: 78 [2023-11-19 05:05:53,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:05:53,487 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 1 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:05:53,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 119 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:05:53,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-19 05:05:53,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2023-11-19 05:05:53,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 42 states have (on average 1.9523809523809523) internal successors, (82), 76 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:05:53,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2023-11-19 05:05:53,499 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 8 [2023-11-19 05:05:53,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:05:53,500 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2023-11-19 05:05:53,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:05:53,500 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2023-11-19 05:05:53,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 05:05:53,501 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:05:53,502 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:05:53,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:05:53,502 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-19 05:05:53,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:05:53,503 INFO L85 PathProgramCache]: Analyzing trace with hash 8744190, now seen corresponding path program 1 times [2023-11-19 05:05:53,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:05:53,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568987628] [2023-11-19 05:05:53,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:05:53,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:05:53,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:05:53,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:05:53,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:05:53,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568987628] [2023-11-19 05:05:53,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568987628] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:05:53,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738594063] [2023-11-19 05:05:53,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:05:53,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:05:53,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4a82b8-f962-4328-a3d7-1104d96be515/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:05:53,651 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4a82b8-f962-4328-a3d7-1104d96be515/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:05:53,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b4a82b8-f962-4328-a3d7-1104d96be515/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:05:53,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:05:53,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 05:05:53,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:05:53,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:05:53,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:05:53,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:05:53,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738594063] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:05:53,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [846538985] [2023-11-19 05:05:54,002 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-19 05:05:54,002 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:05:54,009 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:05:54,016 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:05:54,017 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:05:56,520 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:06:17,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [846538985] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:06:17,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:06:17,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 10 [2023-11-19 05:06:17,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451041035] [2023-11-19 05:06:17,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:06:17,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 05:06:17,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:17,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 05:06:17,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=68, Unknown=6, NotChecked=0, Total=110 [2023-11-19 05:06:17,182 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:06:19,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 05:06:21,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 05:06:23,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 05:06:25,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 05:06:27,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 05:06:28,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 05:06:31,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 05:06:33,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 05:06:40,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 05:06:41,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 05:06:44,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 05:06:46,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 05:06:48,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-19 05:06:51,027 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]