./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdc919d-eb57-49cf-b18c-1cf3991ac776/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdc919d-eb57-49cf-b18c-1cf3991ac776/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdc919d-eb57-49cf-b18c-1cf3991ac776/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdc919d-eb57-49cf-b18c-1cf3991ac776/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdc919d-eb57-49cf-b18c-1cf3991ac776/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdc919d-eb57-49cf-b18c-1cf3991ac776/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d88455bf5089be24833f69dfcbd91003e7e136bcd5efcd63ae18e59d7f59e87d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:38:31,173 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:38:31,240 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdc919d-eb57-49cf-b18c-1cf3991ac776/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 18:38:31,246 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:38:31,246 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:38:31,272 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:38:31,273 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:38:31,273 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:38:31,274 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:38:31,274 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:38:31,275 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:38:31,275 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:38:31,276 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:38:31,276 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 18:38:31,277 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:38:31,277 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:38:31,278 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 18:38:31,278 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 18:38:31,279 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:38:31,279 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 18:38:31,280 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 18:38:31,281 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 18:38:31,282 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:38:31,283 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 18:38:31,283 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:38:31,284 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:38:31,284 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 18:38:31,284 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:38:31,285 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 18:38:31,285 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 18:38:31,286 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:38:31,286 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:38:31,286 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:38:31,286 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:38:31,287 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:38:31,287 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:38:31,287 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:38:31,287 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 18:38:31,288 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 18:38:31,288 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 18:38:31,288 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:38:31,288 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 18:38:31,289 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:38:31,289 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:38:31,289 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_0fdc919d-eb57-49cf-b18c-1cf3991ac776/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdc919d-eb57-49cf-b18c-1cf3991ac776/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d88455bf5089be24833f69dfcbd91003e7e136bcd5efcd63ae18e59d7f59e87d [2023-12-02 18:38:31,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:38:31,536 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:38:31,539 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:38:31,540 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:38:31,540 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:38:31,541 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdc919d-eb57-49cf-b18c-1cf3991ac776/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i [2023-12-02 18:38:34,345 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:38:34,803 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:38:34,803 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdc919d-eb57-49cf-b18c-1cf3991ac776/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i [2023-12-02 18:38:34,844 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdc919d-eb57-49cf-b18c-1cf3991ac776/bin/utaipan-verify-nQ1chXbOIh/data/8ccee2a85/b5a83b4b7e674a4993f0fbb44ff8e053/FLAG5bd7f1507 [2023-12-02 18:38:34,858 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdc919d-eb57-49cf-b18c-1cf3991ac776/bin/utaipan-verify-nQ1chXbOIh/data/8ccee2a85/b5a83b4b7e674a4993f0fbb44ff8e053 [2023-12-02 18:38:34,861 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:38:34,862 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:38:34,863 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:38:34,864 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:38:34,869 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:38:34,869 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:38:34" (1/1) ... [2023-12-02 18:38:34,870 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ad034da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:38:34, skipping insertion in model container [2023-12-02 18:38:34,871 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:38:34" (1/1) ... [2023-12-02 18:38:35,034 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:38:35,928 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdc919d-eb57-49cf-b18c-1cf3991ac776/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i[205251,205264] [2023-12-02 18:38:36,960 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:38:37,015 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:38:37,127 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; bts %2, %0; setc %1": "+m" (*addr), "=qm" (c): "Ir" (nr): "memory"); [7017-7018] [2023-12-02 18:38:37,135 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdc919d-eb57-49cf-b18c-1cf3991ac776/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i[205251,205264] [2023-12-02 18:38:37,320 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:38:37,390 WARN L675 CHandler]: The function __VERIFIER_nondet_u32 is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:38:37,398 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:38:37,398 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:38:37 WrapperNode [2023-12-02 18:38:37,398 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:38:37,400 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:38:37,400 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:38:37,400 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:38:37,406 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:38:37" (1/1) ... [2023-12-02 18:38:37,485 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:38:37" (1/1) ... [2023-12-02 18:38:37,695 INFO L138 Inliner]: procedures = 239, calls = 3162, calls flagged for inlining = 111, calls inlined = 96, statements flattened = 6275 [2023-12-02 18:38:37,695 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:38:37,696 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:38:37,696 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:38:37,696 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:38:37,706 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:38:37" (1/1) ... [2023-12-02 18:38:37,707 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:38:37" (1/1) ... [2023-12-02 18:38:37,738 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:38:37" (1/1) ... [2023-12-02 18:38:37,739 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:38:37" (1/1) ... [2023-12-02 18:38:37,841 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:38:37" (1/1) ... [2023-12-02 18:38:37,864 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:38:37" (1/1) ... [2023-12-02 18:38:37,934 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:38:37" (1/1) ... [2023-12-02 18:38:37,949 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:38:37" (1/1) ... [2023-12-02 18:38:37,974 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:38:37,975 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:38:37,975 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:38:37,975 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:38:37,976 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:38:37" (1/1) ... [2023-12-02 18:38:37,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:38:37,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdc919d-eb57-49cf-b18c-1cf3991ac776/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:38:38,003 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdc919d-eb57-49cf-b18c-1cf3991ac776/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:38:38,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdc919d-eb57-49cf-b18c-1cf3991ac776/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:38:38,044 INFO L130 BoogieDeclarations]: Found specification of procedure at76_hw_scan [2023-12-02 18:38:38,044 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_hw_scan [2023-12-02 18:38:38,044 INFO L130 BoogieDeclarations]: Found specification of procedure at76_dfu_get_status [2023-12-02 18:38:38,044 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_dfu_get_status [2023-12-02 18:38:38,045 INFO L130 BoogieDeclarations]: Found specification of procedure at76_join [2023-12-02 18:38:38,045 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_join [2023-12-02 18:38:38,045 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2023-12-02 18:38:38,045 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2023-12-02 18:38:38,045 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-12-02 18:38:38,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-12-02 18:38:38,046 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-12-02 18:38:38,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-12-02 18:38:38,046 INFO L130 BoogieDeclarations]: Found specification of procedure usb_put_dev [2023-12-02 18:38:38,046 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_put_dev [2023-12-02 18:38:38,046 INFO L130 BoogieDeclarations]: Found specification of procedure at76_submit_rx_urb [2023-12-02 18:38:38,046 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_submit_rx_urb [2023-12-02 18:38:38,047 INFO L130 BoogieDeclarations]: Found specification of procedure at76_add_interface [2023-12-02 18:38:38,047 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_add_interface [2023-12-02 18:38:38,047 INFO L130 BoogieDeclarations]: Found specification of procedure at76_get_timeout [2023-12-02 18:38:38,047 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_get_timeout [2023-12-02 18:38:38,047 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-12-02 18:38:38,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-12-02 18:38:38,047 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2023-12-02 18:38:38,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2023-12-02 18:38:38,048 INFO L130 BoogieDeclarations]: Found specification of procedure at76_bss_info_changed [2023-12-02 18:38:38,048 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_bss_info_changed [2023-12-02 18:38:38,048 INFO L130 BoogieDeclarations]: Found specification of procedure dev_printk [2023-12-02 18:38:38,048 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_printk [2023-12-02 18:38:38,048 INFO L130 BoogieDeclarations]: Found specification of procedure at76_wait_completion [2023-12-02 18:38:38,048 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_wait_completion [2023-12-02 18:38:38,049 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-12-02 18:38:38,049 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-12-02 18:38:38,049 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2023-12-02 18:38:38,049 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2023-12-02 18:38:38,049 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-12-02 18:38:38,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-12-02 18:38:38,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-12-02 18:38:38,050 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-12-02 18:38:38,050 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 18:38:38,050 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 18:38:38,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 18:38:38,050 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2023-12-02 18:38:38,050 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2023-12-02 18:38:38,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 18:38:38,050 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2023-12-02 18:38:38,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2023-12-02 18:38:38,051 INFO L130 BoogieDeclarations]: Found specification of procedure at76_delete_device [2023-12-02 18:38:38,051 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_delete_device [2023-12-02 18:38:38,051 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u32 [2023-12-02 18:38:38,051 INFO L130 BoogieDeclarations]: Found specification of procedure at76_get_mib [2023-12-02 18:38:38,051 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_get_mib [2023-12-02 18:38:38,051 INFO L130 BoogieDeclarations]: Found specification of procedure at76_set_radio [2023-12-02 18:38:38,051 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_set_radio [2023-12-02 18:38:38,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 18:38:38,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 18:38:38,052 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-12-02 18:38:38,052 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-12-02 18:38:38,052 INFO L130 BoogieDeclarations]: Found specification of procedure led_trigger_event [2023-12-02 18:38:38,052 INFO L138 BoogieDeclarations]: Found implementation of procedure led_trigger_event [2023-12-02 18:38:38,052 INFO L130 BoogieDeclarations]: Found specification of procedure at76_set_card_command [2023-12-02 18:38:38,053 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_set_card_command [2023-12-02 18:38:38,053 INFO L130 BoogieDeclarations]: Found specification of procedure at76_get_cmd_status [2023-12-02 18:38:38,053 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_get_cmd_status [2023-12-02 18:38:38,053 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-12-02 18:38:38,053 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-12-02 18:38:38,053 INFO L130 BoogieDeclarations]: Found specification of procedure cancel_work_sync [2023-12-02 18:38:38,053 INFO L138 BoogieDeclarations]: Found implementation of procedure cancel_work_sync [2023-12-02 18:38:38,054 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2023-12-02 18:38:38,054 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2023-12-02 18:38:38,054 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-12-02 18:38:38,054 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-12-02 18:38:38,054 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_queue_delayed_work [2023-12-02 18:38:38,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_queue_delayed_work [2023-12-02 18:38:38,054 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2023-12-02 18:38:38,054 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2023-12-02 18:38:38,055 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2023-12-02 18:38:38,055 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2023-12-02 18:38:38,055 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2023-12-02 18:38:38,055 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2023-12-02 18:38:38,055 INFO L130 BoogieDeclarations]: Found specification of procedure at76_set_mib [2023-12-02 18:38:38,055 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_set_mib [2023-12-02 18:38:38,055 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2023-12-02 18:38:38,056 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2023-12-02 18:38:38,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-12-02 18:38:38,056 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-12-02 18:38:38,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-12-02 18:38:38,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-12-02 18:38:38,056 INFO L130 BoogieDeclarations]: Found specification of procedure at76_set_pm_mode [2023-12-02 18:38:38,057 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_set_pm_mode [2023-12-02 18:38:38,057 INFO L130 BoogieDeclarations]: Found specification of procedure _dev_info [2023-12-02 18:38:38,057 INFO L138 BoogieDeclarations]: Found implementation of procedure _dev_info [2023-12-02 18:38:38,057 INFO L130 BoogieDeclarations]: Found specification of procedure at76_set_key [2023-12-02 18:38:38,057 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_set_key [2023-12-02 18:38:38,057 INFO L130 BoogieDeclarations]: Found specification of procedure at76_is_505a [2023-12-02 18:38:38,057 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_is_505a [2023-12-02 18:38:38,058 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 18:38:38,058 INFO L130 BoogieDeclarations]: Found specification of procedure at76_get_hw_cfg [2023-12-02 18:38:38,058 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_get_hw_cfg [2023-12-02 18:38:38,058 INFO L130 BoogieDeclarations]: Found specification of procedure at76_config [2023-12-02 18:38:38,058 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_config [2023-12-02 18:38:38,058 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2023-12-02 18:38:38,058 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2023-12-02 18:38:38,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-12-02 18:38:38,058 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-12-02 18:38:38,059 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2023-12-02 18:38:38,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2023-12-02 18:38:38,059 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-12-02 18:38:38,059 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-12-02 18:38:38,059 INFO L130 BoogieDeclarations]: Found specification of procedure skb_trim [2023-12-02 18:38:38,059 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_trim [2023-12-02 18:38:38,059 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2023-12-02 18:38:38,060 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2023-12-02 18:38:38,060 INFO L130 BoogieDeclarations]: Found specification of procedure at76_get_op_mode [2023-12-02 18:38:38,060 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_get_op_mode [2023-12-02 18:38:38,060 INFO L130 BoogieDeclarations]: Found specification of procedure at76_remove_interface [2023-12-02 18:38:38,060 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_remove_interface [2023-12-02 18:38:38,060 INFO L130 BoogieDeclarations]: Found specification of procedure print_hex_dump [2023-12-02 18:38:38,060 INFO L138 BoogieDeclarations]: Found implementation of procedure print_hex_dump [2023-12-02 18:38:38,060 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-12-02 18:38:38,061 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-12-02 18:38:38,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 18:38:38,061 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-12-02 18:38:38,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-12-02 18:38:38,061 INFO L130 BoogieDeclarations]: Found specification of procedure wiphy_name [2023-12-02 18:38:38,061 INFO L138 BoogieDeclarations]: Found implementation of procedure wiphy_name [2023-12-02 18:38:38,061 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_timeout_interruptible [2023-12-02 18:38:38,062 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_timeout_interruptible [2023-12-02 18:38:38,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 18:38:38,062 INFO L130 BoogieDeclarations]: Found specification of procedure at76_start_monitor [2023-12-02 18:38:38,062 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_start_monitor [2023-12-02 18:38:38,062 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_stop_queues [2023-12-02 18:38:38,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_stop_queues [2023-12-02 18:38:38,062 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2023-12-02 18:38:38,062 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2023-12-02 18:38:38,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:38:38,063 INFO L130 BoogieDeclarations]: Found specification of procedure is_valid_ether_addr [2023-12-02 18:38:38,063 INFO L138 BoogieDeclarations]: Found implementation of procedure is_valid_ether_addr [2023-12-02 18:38:38,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 18:38:38,063 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2023-12-02 18:38:38,063 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2023-12-02 18:38:38,063 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2023-12-02 18:38:38,063 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2023-12-02 18:38:38,064 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2023-12-02 18:38:38,064 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2023-12-02 18:38:38,064 INFO L130 BoogieDeclarations]: Found specification of procedure __init_work [2023-12-02 18:38:38,064 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_work [2023-12-02 18:38:38,064 INFO L130 BoogieDeclarations]: Found specification of procedure at76_configure_filter [2023-12-02 18:38:38,064 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_configure_filter [2023-12-02 18:38:38,064 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2023-12-02 18:38:38,065 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2023-12-02 18:38:38,065 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_queue_work [2023-12-02 18:38:38,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_queue_work [2023-12-02 18:38:38,065 INFO L130 BoogieDeclarations]: Found specification of procedure dev_name [2023-12-02 18:38:38,065 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_name [2023-12-02 18:38:38,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 18:38:38,065 INFO L130 BoogieDeclarations]: Found specification of procedure at76_mac80211_tx [2023-12-02 18:38:38,066 INFO L138 BoogieDeclarations]: Found implementation of procedure at76_mac80211_tx [2023-12-02 18:38:38,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:38:38,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:38:38,066 INFO L130 BoogieDeclarations]: Found specification of procedure IEEE80211_SKB_CB [2023-12-02 18:38:38,066 INFO L138 BoogieDeclarations]: Found implementation of procedure IEEE80211_SKB_CB [2023-12-02 18:38:38,764 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:38:38,767 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:38:39,073 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-12-02 18:38:48,527 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:38:49,775 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:38:49,775 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-12-02 18:38:49,777 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:38:49 BoogieIcfgContainer [2023-12-02 18:38:49,777 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:38:49,780 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:38:49,780 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:38:49,783 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:38:49,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:38:34" (1/3) ... [2023-12-02 18:38:49,784 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d3e1010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:38:49, skipping insertion in model container [2023-12-02 18:38:49,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:38:37" (2/3) ... [2023-12-02 18:38:49,784 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d3e1010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:38:49, skipping insertion in model container [2023-12-02 18:38:49,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:38:49" (3/3) ... [2023-12-02 18:38:49,786 INFO L112 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--at76c50x-usb.ko-entry_point.cil.out.i [2023-12-02 18:38:49,804 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:38:49,805 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 18:38:49,886 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:38:49,893 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@13a52c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:38:49,893 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 18:38:49,904 INFO L276 IsEmpty]: Start isEmpty. Operand has 1386 states, 888 states have (on average 1.3355855855855856) internal successors, (1186), 910 states have internal predecessors, (1186), 425 states have call successors, (425), 72 states have call predecessors, (425), 71 states have return successors, (420), 419 states have call predecessors, (420), 420 states have call successors, (420) [2023-12-02 18:38:49,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-02 18:38:49,917 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:38:49,918 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:38:49,918 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:38:49,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:38:49,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1795579185, now seen corresponding path program 1 times [2023-12-02 18:38:49,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:38:49,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908703474] [2023-12-02 18:38:49,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:38:49,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:38:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:38:51,005 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-12-02 18:38:51,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:38:51,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908703474] [2023-12-02 18:38:51,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908703474] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:38:51,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:38:51,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:38:51,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366289827] [2023-12-02 18:38:51,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:38:51,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:38:51,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:38:51,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:38:51,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:38:51,047 INFO L87 Difference]: Start difference. First operand has 1386 states, 888 states have (on average 1.3355855855855856) internal successors, (1186), 910 states have internal predecessors, (1186), 425 states have call successors, (425), 72 states have call predecessors, (425), 71 states have return successors, (420), 419 states have call predecessors, (420), 420 states have call successors, (420) Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-12-02 18:38:55,319 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 [] [2023-12-02 18:38:57,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:38:59,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:38:59,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:38:59,722 INFO L93 Difference]: Finished difference Result 4089 states and 6007 transitions. [2023-12-02 18:38:59,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:38:59,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 74 [2023-12-02 18:38:59,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:38:59,761 INFO L225 Difference]: With dead ends: 4089 [2023-12-02 18:38:59,761 INFO L226 Difference]: Without dead ends: 2710 [2023-12-02 18:38:59,772 INFO L412 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 [2023-12-02 18:38:59,776 INFO L413 NwaCegarLoop]: 1840 mSDtfsCounter, 1968 mSDsluCounter, 1813 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 9 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1968 SdHoareTripleChecker+Valid, 3653 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:38:59,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1968 Valid, 3653 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 390 Invalid, 3 Unknown, 0 Unchecked, 8.4s Time] [2023-12-02 18:38:59,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2023-12-02 18:39:00,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 2710. [2023-12-02 18:39:00,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2710 states, 1747 states have (on average 1.3262736119061247) internal successors, (2317), 1777 states have internal predecessors, (2317), 822 states have call successors, (822), 141 states have call predecessors, (822), 140 states have return successors, (821), 819 states have call predecessors, (821), 821 states have call successors, (821) [2023-12-02 18:39:00,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2710 states to 2710 states and 3960 transitions. [2023-12-02 18:39:00,039 INFO L78 Accepts]: Start accepts. Automaton has 2710 states and 3960 transitions. Word has length 74 [2023-12-02 18:39:00,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:39:00,040 INFO L495 AbstractCegarLoop]: Abstraction has 2710 states and 3960 transitions. [2023-12-02 18:39:00,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-12-02 18:39:00,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2710 states and 3960 transitions. [2023-12-02 18:39:00,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-02 18:39:00,049 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:00,049 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:39:00,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 18:39:00,050 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:39:00,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:00,050 INFO L85 PathProgramCache]: Analyzing trace with hash -191455550, now seen corresponding path program 1 times [2023-12-02 18:39:00,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:39:00,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247957000] [2023-12-02 18:39:00,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:00,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:39:00,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-12-02 18:39:00,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:39:00,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247957000] [2023-12-02 18:39:00,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247957000] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:39:00,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:39:00,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:39:00,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850844464] [2023-12-02 18:39:00,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:39:00,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:39:00,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:39:00,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:39:00,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:39:00,860 INFO L87 Difference]: Start difference. First operand 2710 states and 3960 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2023-12-02 18:39:05,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:39:07,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:39:09,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:39:11,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:39:13,739 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 [] [2023-12-02 18:39:14,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:39:14,081 INFO L93 Difference]: Finished difference Result 5399 states and 7901 transitions. [2023-12-02 18:39:14,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:39:14,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 88 [2023-12-02 18:39:14,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:39:14,125 INFO L225 Difference]: With dead ends: 5399 [2023-12-02 18:39:14,125 INFO L226 Difference]: Without dead ends: 5391 [2023-12-02 18:39:14,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:39:14,131 INFO L413 NwaCegarLoop]: 1864 mSDtfsCounter, 1985 mSDsluCounter, 3656 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 1 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1985 SdHoareTripleChecker+Valid, 5520 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:39:14,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1985 Valid, 5520 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 593 Invalid, 5 Unknown, 0 Unchecked, 13.0s Time] [2023-12-02 18:39:14,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5391 states. [2023-12-02 18:39:14,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5391 to 5383. [2023-12-02 18:39:14,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5383 states, 3470 states have (on average 1.3268011527377521) internal successors, (4604), 3530 states have internal predecessors, (4604), 1632 states have call successors, (1632), 281 states have call predecessors, (1632), 280 states have return successors, (1643), 1627 states have call predecessors, (1643), 1631 states have call successors, (1643) [2023-12-02 18:39:14,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5383 states to 5383 states and 7879 transitions. [2023-12-02 18:39:14,428 INFO L78 Accepts]: Start accepts. Automaton has 5383 states and 7879 transitions. Word has length 88 [2023-12-02 18:39:14,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:39:14,429 INFO L495 AbstractCegarLoop]: Abstraction has 5383 states and 7879 transitions. [2023-12-02 18:39:14,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2023-12-02 18:39:14,429 INFO L276 IsEmpty]: Start isEmpty. Operand 5383 states and 7879 transitions. [2023-12-02 18:39:14,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-12-02 18:39:14,439 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:14,439 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:39:14,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 18:39:14,439 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:39:14,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:14,440 INFO L85 PathProgramCache]: Analyzing trace with hash 664561890, now seen corresponding path program 1 times [2023-12-02 18:39:14,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:39:14,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778310624] [2023-12-02 18:39:14,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:14,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:39:14,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:14,818 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2023-12-02 18:39:14,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:39:14,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778310624] [2023-12-02 18:39:14,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778310624] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:39:14,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:39:14,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:39:14,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598608881] [2023-12-02 18:39:14,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:39:14,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:39:14,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:39:14,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:39:14,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:39:14,821 INFO L87 Difference]: Start difference. First operand 5383 states and 7879 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-12-02 18:39:18,450 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 [] [2023-12-02 18:39:20,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:39:22,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:39:22,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:39:22,828 INFO L93 Difference]: Finished difference Result 13188 states and 19262 transitions. [2023-12-02 18:39:22,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:39:22,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 139 [2023-12-02 18:39:22,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:39:22,916 INFO L225 Difference]: With dead ends: 13188 [2023-12-02 18:39:22,916 INFO L226 Difference]: Without dead ends: 7826 [2023-12-02 18:39:22,932 INFO L412 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 [2023-12-02 18:39:22,934 INFO L413 NwaCegarLoop]: 1831 mSDtfsCounter, 928 mSDsluCounter, 1738 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 3569 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:39:22,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [928 Valid, 3569 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 437 Invalid, 3 Unknown, 0 Unchecked, 7.8s Time] [2023-12-02 18:39:22,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7826 states. [2023-12-02 18:39:23,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7826 to 7819. [2023-12-02 18:39:23,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7819 states, 5070 states have (on average 1.3301775147928994) internal successors, (6744), 5143 states have internal predecessors, (6744), 2320 states have call successors, (2320), 429 states have call predecessors, (2320), 428 states have return successors, (2339), 2310 states have call predecessors, (2339), 2319 states have call successors, (2339) [2023-12-02 18:39:23,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7819 states to 7819 states and 11403 transitions. [2023-12-02 18:39:23,324 INFO L78 Accepts]: Start accepts. Automaton has 7819 states and 11403 transitions. Word has length 139 [2023-12-02 18:39:23,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:39:23,325 INFO L495 AbstractCegarLoop]: Abstraction has 7819 states and 11403 transitions. [2023-12-02 18:39:23,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2023-12-02 18:39:23,325 INFO L276 IsEmpty]: Start isEmpty. Operand 7819 states and 11403 transitions. [2023-12-02 18:39:23,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-12-02 18:39:23,332 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:23,332 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:39:23,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 18:39:23,333 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:39:23,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:23,334 INFO L85 PathProgramCache]: Analyzing trace with hash 580173993, now seen corresponding path program 1 times [2023-12-02 18:39:23,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:39:23,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080020976] [2023-12-02 18:39:23,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:23,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:39:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:23,794 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2023-12-02 18:39:23,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:39:23,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080020976] [2023-12-02 18:39:23,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080020976] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:39:23,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:39:23,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:39:23,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387893905] [2023-12-02 18:39:23,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:39:23,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:39:23,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:39:23,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:39:23,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:39:23,798 INFO L87 Difference]: Start difference. First operand 7819 states and 11403 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 18:39:28,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:39:30,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:39:30,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:39:30,336 INFO L93 Difference]: Finished difference Result 19018 states and 27642 transitions. [2023-12-02 18:39:30,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:39:30,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 146 [2023-12-02 18:39:30,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:39:30,392 INFO L225 Difference]: With dead ends: 19018 [2023-12-02 18:39:30,392 INFO L226 Difference]: Without dead ends: 11229 [2023-12-02 18:39:30,421 INFO L412 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 [2023-12-02 18:39:30,422 INFO L413 NwaCegarLoop]: 2482 mSDtfsCounter, 1204 mSDsluCounter, 1789 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1204 SdHoareTripleChecker+Valid, 4271 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:39:30,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1204 Valid, 4271 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 439 Invalid, 2 Unknown, 0 Unchecked, 6.2s Time] [2023-12-02 18:39:30,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11229 states. [2023-12-02 18:39:30,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11229 to 11219. [2023-12-02 18:39:30,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11219 states, 7264 states have (on average 1.3265418502202644) internal successors, (9636), 7391 states have internal predecessors, (9636), 3302 states have call successors, (3302), 653 states have call predecessors, (3302), 652 states have return successors, (3325), 3286 states have call predecessors, (3325), 3301 states have call successors, (3325) [2023-12-02 18:39:30,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11219 states to 11219 states and 16263 transitions. [2023-12-02 18:39:30,987 INFO L78 Accepts]: Start accepts. Automaton has 11219 states and 16263 transitions. Word has length 146 [2023-12-02 18:39:30,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:39:30,987 INFO L495 AbstractCegarLoop]: Abstraction has 11219 states and 16263 transitions. [2023-12-02 18:39:30,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 18:39:30,988 INFO L276 IsEmpty]: Start isEmpty. Operand 11219 states and 16263 transitions. [2023-12-02 18:39:30,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-12-02 18:39:31,000 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:31,000 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:39:31,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 18:39:31,001 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:39:31,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:31,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1273064488, now seen corresponding path program 1 times [2023-12-02 18:39:31,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:39:31,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520136026] [2023-12-02 18:39:31,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:31,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:39:31,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:31,962 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2023-12-02 18:39:31,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:39:31,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520136026] [2023-12-02 18:39:31,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520136026] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:39:31,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:39:31,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:39:31,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140466961] [2023-12-02 18:39:31,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:39:31,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:39:31,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:39:31,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:39:31,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:39:31,964 INFO L87 Difference]: Start difference. First operand 11219 states and 16263 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2023-12-02 18:39:36,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:39:38,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:39:40,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:39:42,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:39:43,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:39:43,510 INFO L93 Difference]: Finished difference Result 22460 states and 32583 transitions. [2023-12-02 18:39:43,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:39:43,511 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) Word has length 162 [2023-12-02 18:39:43,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:39:43,549 INFO L225 Difference]: With dead ends: 22460 [2023-12-02 18:39:43,549 INFO L226 Difference]: Without dead ends: 11273 [2023-12-02 18:39:43,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:39:43,576 INFO L413 NwaCegarLoop]: 1821 mSDtfsCounter, 2 mSDsluCounter, 5458 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7279 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:39:43,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7279 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 767 Invalid, 4 Unknown, 0 Unchecked, 11.2s Time] [2023-12-02 18:39:43,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11273 states. [2023-12-02 18:39:43,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11273 to 11259. [2023-12-02 18:39:43,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11259 states, 7292 states have (on average 1.3252879868348875) internal successors, (9664), 7423 states have internal predecessors, (9664), 3302 states have call successors, (3302), 653 states have call predecessors, (3302), 664 states have return successors, (3343), 3294 states have call predecessors, (3343), 3301 states have call successors, (3343) [2023-12-02 18:39:44,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11259 states to 11259 states and 16309 transitions. [2023-12-02 18:39:44,079 INFO L78 Accepts]: Start accepts. Automaton has 11259 states and 16309 transitions. Word has length 162 [2023-12-02 18:39:44,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:39:44,080 INFO L495 AbstractCegarLoop]: Abstraction has 11259 states and 16309 transitions. [2023-12-02 18:39:44,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 3 states have call predecessors, (23), 2 states have call successors, (23) [2023-12-02 18:39:44,081 INFO L276 IsEmpty]: Start isEmpty. Operand 11259 states and 16309 transitions. [2023-12-02 18:39:44,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-12-02 18:39:44,093 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:44,094 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:39:44,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 18:39:44,094 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:39:44,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:44,095 INFO L85 PathProgramCache]: Analyzing trace with hash -654058219, now seen corresponding path program 1 times [2023-12-02 18:39:44,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:39:44,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401583418] [2023-12-02 18:39:44,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:44,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:39:44,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:44,559 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2023-12-02 18:39:44,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:39:44,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401583418] [2023-12-02 18:39:44,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401583418] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:39:44,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:39:44,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:39:44,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346090980] [2023-12-02 18:39:44,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:39:44,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:39:44,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:39:44,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:39:44,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:39:44,562 INFO L87 Difference]: Start difference. First operand 11259 states and 16309 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-12-02 18:39:48,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:39:50,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:39:50,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:39:50,991 INFO L93 Difference]: Finished difference Result 22534 states and 32656 transitions. [2023-12-02 18:39:50,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:39:50,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 166 [2023-12-02 18:39:50,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:39:51,025 INFO L225 Difference]: With dead ends: 22534 [2023-12-02 18:39:51,025 INFO L226 Difference]: Without dead ends: 11307 [2023-12-02 18:39:51,049 INFO L412 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 [2023-12-02 18:39:51,050 INFO L413 NwaCegarLoop]: 1828 mSDtfsCounter, 4 mSDsluCounter, 1816 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 3644 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:39:51,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 3644 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 388 Invalid, 2 Unknown, 0 Unchecked, 6.1s Time] [2023-12-02 18:39:51,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11307 states. [2023-12-02 18:39:51,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11307 to 11267. [2023-12-02 18:39:51,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11267 states, 7300 states have (on average 1.324931506849315) internal successors, (9672), 7431 states have internal predecessors, (9672), 3302 states have call successors, (3302), 653 states have call predecessors, (3302), 664 states have return successors, (3343), 3294 states have call predecessors, (3343), 3301 states have call successors, (3343) [2023-12-02 18:39:51,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11267 states to 11267 states and 16317 transitions. [2023-12-02 18:39:51,647 INFO L78 Accepts]: Start accepts. Automaton has 11267 states and 16317 transitions. Word has length 166 [2023-12-02 18:39:51,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:39:51,648 INFO L495 AbstractCegarLoop]: Abstraction has 11267 states and 16317 transitions. [2023-12-02 18:39:51,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-12-02 18:39:51,648 INFO L276 IsEmpty]: Start isEmpty. Operand 11267 states and 16317 transitions. [2023-12-02 18:39:51,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-12-02 18:39:51,664 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:51,664 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:39:51,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 18:39:51,665 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:39:51,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:51,665 INFO L85 PathProgramCache]: Analyzing trace with hash -242001273, now seen corresponding path program 1 times [2023-12-02 18:39:51,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:39:51,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979724604] [2023-12-02 18:39:51,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:51,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:39:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:52,190 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2023-12-02 18:39:52,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:39:52,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979724604] [2023-12-02 18:39:52,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979724604] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:39:52,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:39:52,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:39:52,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118234261] [2023-12-02 18:39:52,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:39:52,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:39:52,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:39:52,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:39:52,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:39:52,192 INFO L87 Difference]: Start difference. First operand 11267 states and 16317 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) [2023-12-02 18:39:56,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:39:58,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:39:58,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:39:58,529 INFO L93 Difference]: Finished difference Result 11273 states and 16323 transitions. [2023-12-02 18:39:58,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:39:58,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) Word has length 170 [2023-12-02 18:39:58,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:39:58,557 INFO L225 Difference]: With dead ends: 11273 [2023-12-02 18:39:58,557 INFO L226 Difference]: Without dead ends: 11268 [2023-12-02 18:39:58,560 INFO L412 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 [2023-12-02 18:39:58,561 INFO L413 NwaCegarLoop]: 1823 mSDtfsCounter, 0 mSDsluCounter, 1822 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3645 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:39:58,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3645 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 378 Invalid, 2 Unknown, 0 Unchecked, 6.1s Time] [2023-12-02 18:39:58,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11268 states. [2023-12-02 18:39:58,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11268 to 11268. [2023-12-02 18:39:58,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11268 states, 7301 states have (on average 1.324887001780578) internal successors, (9673), 7432 states have internal predecessors, (9673), 3302 states have call successors, (3302), 653 states have call predecessors, (3302), 664 states have return successors, (3343), 3294 states have call predecessors, (3343), 3301 states have call successors, (3343) [2023-12-02 18:39:59,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11268 states to 11268 states and 16318 transitions. [2023-12-02 18:39:59,005 INFO L78 Accepts]: Start accepts. Automaton has 11268 states and 16318 transitions. Word has length 170 [2023-12-02 18:39:59,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:39:59,005 INFO L495 AbstractCegarLoop]: Abstraction has 11268 states and 16318 transitions. [2023-12-02 18:39:59,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 1 states have call predecessors, (25), 1 states have call successors, (25) [2023-12-02 18:39:59,006 INFO L276 IsEmpty]: Start isEmpty. Operand 11268 states and 16318 transitions. [2023-12-02 18:39:59,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-12-02 18:39:59,018 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:59,019 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:39:59,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 18:39:59,019 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:39:59,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:59,019 INFO L85 PathProgramCache]: Analyzing trace with hash 840185435, now seen corresponding path program 1 times [2023-12-02 18:39:59,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:39:59,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841455693] [2023-12-02 18:39:59,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:59,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:39:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:59,814 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2023-12-02 18:39:59,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:39:59,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841455693] [2023-12-02 18:39:59,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841455693] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:39:59,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692964896] [2023-12-02 18:39:59,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:59,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:59,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdc919d-eb57-49cf-b18c-1cf3991ac776/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:39:59,817 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdc919d-eb57-49cf-b18c-1cf3991ac776/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:39:59,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdc919d-eb57-49cf-b18c-1cf3991ac776/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 18:40:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:01,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 5310 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:40:01,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:40:01,390 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2023-12-02 18:40:01,390 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:40:01,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692964896] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:40:01,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:40:01,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-12-02 18:40:01,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102222520] [2023-12-02 18:40:01,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:40:01,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:40:01,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:40:01,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:40:01,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:40:01,393 INFO L87 Difference]: Start difference. First operand 11268 states and 16318 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2023-12-02 18:40:07,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:40:09,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:40:11,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:40:13,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:40:15,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:40:17,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:40:18,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:40:18,503 INFO L93 Difference]: Finished difference Result 33742 states and 48864 transitions. [2023-12-02 18:40:18,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:40:18,504 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 171 [2023-12-02 18:40:18,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:40:18,597 INFO L225 Difference]: With dead ends: 33742 [2023-12-02 18:40:18,597 INFO L226 Difference]: Without dead ends: 33722 [2023-12-02 18:40:18,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:40:18,607 INFO L413 NwaCegarLoop]: 3610 mSDtfsCounter, 3892 mSDsluCounter, 2767 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 9 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3892 SdHoareTripleChecker+Valid, 6377 SdHoareTripleChecker+Invalid, 1615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:40:18,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3892 Valid, 6377 Invalid, 1615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1600 Invalid, 6 Unknown, 0 Unchecked, 16.4s Time] [2023-12-02 18:40:18,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33722 states. [2023-12-02 18:40:19,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33722 to 33680. [2023-12-02 18:40:19,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33680 states, 21821 states have (on average 1.3256496035928693) internal successors, (28927), 22232 states have internal predecessors, (28927), 9874 states have call successors, (9874), 1949 states have call predecessors, (9874), 1984 states have return successors, (9999), 9834 states have call predecessors, (9999), 9873 states have call successors, (9999) [2023-12-02 18:40:19,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33680 states to 33680 states and 48800 transitions. [2023-12-02 18:40:19,981 INFO L78 Accepts]: Start accepts. Automaton has 33680 states and 48800 transitions. Word has length 171 [2023-12-02 18:40:19,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:40:19,982 INFO L495 AbstractCegarLoop]: Abstraction has 33680 states and 48800 transitions. [2023-12-02 18:40:19,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2023-12-02 18:40:19,982 INFO L276 IsEmpty]: Start isEmpty. Operand 33680 states and 48800 transitions. [2023-12-02 18:40:20,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-12-02 18:40:20,020 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:40:20,020 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:40:20,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdc919d-eb57-49cf-b18c-1cf3991ac776/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 18:40:20,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdc919d-eb57-49cf-b18c-1cf3991ac776/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:40:20,221 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:40:20,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:40:20,221 INFO L85 PathProgramCache]: Analyzing trace with hash -199180363, now seen corresponding path program 1 times [2023-12-02 18:40:20,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:40:20,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271517649] [2023-12-02 18:40:20,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:40:20,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:40:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2023-12-02 18:40:20,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:40:20,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271517649] [2023-12-02 18:40:20,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271517649] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:40:20,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:40:20,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:40:20,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456602338] [2023-12-02 18:40:20,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:40:20,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:40:20,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:40:20,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:40:20,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:40:20,741 INFO L87 Difference]: Start difference. First operand 33680 states and 48800 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2023-12-02 18:40:25,315 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 [] [2023-12-02 18:40:26,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:40:26,070 INFO L93 Difference]: Finished difference Result 79130 states and 114213 transitions. [2023-12-02 18:40:26,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:40:26,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 170 [2023-12-02 18:40:26,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:40:26,190 INFO L225 Difference]: With dead ends: 79130 [2023-12-02 18:40:26,190 INFO L226 Difference]: Without dead ends: 45482 [2023-12-02 18:40:26,249 INFO L412 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 [2023-12-02 18:40:26,250 INFO L413 NwaCegarLoop]: 1954 mSDtfsCounter, 1945 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1945 SdHoareTripleChecker+Valid, 3142 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:40:26,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1945 Valid, 3142 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 331 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2023-12-02 18:40:26,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45482 states. [2023-12-02 18:40:27,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45482 to 45416. [2023-12-02 18:40:27,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45416 states, 29481 states have (on average 1.3213595196906482) internal successors, (38955), 30064 states have internal predecessors, (38955), 13092 states have call successors, (13092), 2789 states have call predecessors, (13092), 2842 states have return successors, (13271), 13042 states have call predecessors, (13271), 13091 states have call successors, (13271) [2023-12-02 18:40:28,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45416 states to 45416 states and 65318 transitions. [2023-12-02 18:40:28,160 INFO L78 Accepts]: Start accepts. Automaton has 45416 states and 65318 transitions. Word has length 170 [2023-12-02 18:40:28,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:40:28,161 INFO L495 AbstractCegarLoop]: Abstraction has 45416 states and 65318 transitions. [2023-12-02 18:40:28,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2023-12-02 18:40:28,161 INFO L276 IsEmpty]: Start isEmpty. Operand 45416 states and 65318 transitions. [2023-12-02 18:40:28,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-12-02 18:40:28,188 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:40:28,188 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:40:28,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 18:40:28,189 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:40:28,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:40:28,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1075344506, now seen corresponding path program 1 times [2023-12-02 18:40:28,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:40:28,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196749268] [2023-12-02 18:40:28,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:40:28,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:40:28,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 348 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2023-12-02 18:40:28,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:40:28,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196749268] [2023-12-02 18:40:28,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196749268] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:40:28,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:40:28,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:40:28,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952982182] [2023-12-02 18:40:28,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:40:28,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:40:28,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:40:28,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:40:28,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:40:28,588 INFO L87 Difference]: Start difference. First operand 45416 states and 65318 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-12-02 18:40:32,847 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 [] [2023-12-02 18:40:34,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:40:36,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:40:37,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:40:37,775 INFO L93 Difference]: Finished difference Result 71017 states and 102106 transitions. [2023-12-02 18:40:37,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:40:37,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 184 [2023-12-02 18:40:37,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:40:37,846 INFO L225 Difference]: With dead ends: 71017 [2023-12-02 18:40:37,846 INFO L226 Difference]: Without dead ends: 25501 [2023-12-02 18:40:37,933 INFO L412 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 [2023-12-02 18:40:37,934 INFO L413 NwaCegarLoop]: 2581 mSDtfsCounter, 1931 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1931 SdHoareTripleChecker+Valid, 3389 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:40:37,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1931 Valid, 3389 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 416 Invalid, 3 Unknown, 0 Unchecked, 8.2s Time] [2023-12-02 18:40:37,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25501 states. [2023-12-02 18:40:39,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25501 to 25468. [2023-12-02 18:40:39,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25468 states, 16577 states have (on average 1.3195994450141764) internal successors, (21875), 16881 states have internal predecessors, (21875), 7277 states have call successors, (7277), 1587 states have call predecessors, (7277), 1613 states have return successors, (7377), 7247 states have call predecessors, (7377), 7276 states have call successors, (7377) [2023-12-02 18:40:39,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25468 states to 25468 states and 36529 transitions. [2023-12-02 18:40:39,163 INFO L78 Accepts]: Start accepts. Automaton has 25468 states and 36529 transitions. Word has length 184 [2023-12-02 18:40:39,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:40:39,163 INFO L495 AbstractCegarLoop]: Abstraction has 25468 states and 36529 transitions. [2023-12-02 18:40:39,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-12-02 18:40:39,164 INFO L276 IsEmpty]: Start isEmpty. Operand 25468 states and 36529 transitions. [2023-12-02 18:40:39,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2023-12-02 18:40:39,183 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:40:39,183 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:40:39,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 18:40:39,184 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:40:39,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:40:39,184 INFO L85 PathProgramCache]: Analyzing trace with hash -602414295, now seen corresponding path program 1 times [2023-12-02 18:40:39,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:40:39,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985356525] [2023-12-02 18:40:39,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:40:39,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:40:39,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2023-12-02 18:40:39,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:40:39,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985356525] [2023-12-02 18:40:39,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985356525] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:40:39,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:40:39,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:40:39,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757620266] [2023-12-02 18:40:39,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:40:39,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:40:39,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:40:39,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:40:39,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:40:39,510 INFO L87 Difference]: Start difference. First operand 25468 states and 36529 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-12-02 18:40:43,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:40:45,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:40:46,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:40:46,337 INFO L93 Difference]: Finished difference Result 50968 states and 73128 transitions. [2023-12-02 18:40:46,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:40:46,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 197 [2023-12-02 18:40:46,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:40:46,395 INFO L225 Difference]: With dead ends: 50968 [2023-12-02 18:40:46,395 INFO L226 Difference]: Without dead ends: 25532 [2023-12-02 18:40:46,435 INFO L412 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 [2023-12-02 18:40:46,435 INFO L413 NwaCegarLoop]: 1821 mSDtfsCounter, 1 mSDsluCounter, 1806 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3627 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:40:46,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 3627 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 392 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2023-12-02 18:40:46,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25532 states. [2023-12-02 18:40:47,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25532 to 25500. [2023-12-02 18:40:47,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25500 states, 16593 states have (on average 1.3192912674019164) internal successors, (21891), 16897 states have internal predecessors, (21891), 7293 states have call successors, (7293), 1587 states have call predecessors, (7293), 1613 states have return successors, (7393), 7263 states have call predecessors, (7393), 7292 states have call successors, (7393) [2023-12-02 18:40:47,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25500 states to 25500 states and 36577 transitions. [2023-12-02 18:40:47,507 INFO L78 Accepts]: Start accepts. Automaton has 25500 states and 36577 transitions. Word has length 197 [2023-12-02 18:40:47,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:40:47,507 INFO L495 AbstractCegarLoop]: Abstraction has 25500 states and 36577 transitions. [2023-12-02 18:40:47,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-12-02 18:40:47,508 INFO L276 IsEmpty]: Start isEmpty. Operand 25500 states and 36577 transitions. [2023-12-02 18:40:47,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2023-12-02 18:40:47,527 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:40:47,527 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:40:47,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 18:40:47,527 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:40:47,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:40:47,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1044790829, now seen corresponding path program 1 times [2023-12-02 18:40:47,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:40:47,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189231002] [2023-12-02 18:40:47,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:40:47,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:40:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:47,856 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2023-12-02 18:40:47,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:40:47,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189231002] [2023-12-02 18:40:47,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189231002] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:40:47,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:40:47,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:40:47,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86698454] [2023-12-02 18:40:47,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:40:47,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:40:47,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:40:47,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:40:47,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:40:47,858 INFO L87 Difference]: Start difference. First operand 25500 states and 36577 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-12-02 18:40:52,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:40:54,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:40:55,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:40:55,032 INFO L93 Difference]: Finished difference Result 38360 states and 55091 transitions. [2023-12-02 18:40:55,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:40:55,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 200 [2023-12-02 18:40:55,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:40:55,104 INFO L225 Difference]: With dead ends: 38360 [2023-12-02 18:40:55,104 INFO L226 Difference]: Without dead ends: 25564 [2023-12-02 18:40:55,136 INFO L412 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 [2023-12-02 18:40:55,137 INFO L413 NwaCegarLoop]: 1821 mSDtfsCounter, 4 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3636 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:40:55,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 3636 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 380 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2023-12-02 18:40:55,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25564 states. [2023-12-02 18:40:56,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25564 to 25564. [2023-12-02 18:40:56,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25564 states, 16641 states have (on average 1.3183702902469803) internal successors, (21939), 16961 states have internal predecessors, (21939), 7293 states have call successors, (7293), 1587 states have call predecessors, (7293), 1629 states have return successors, (7409), 7263 states have call predecessors, (7409), 7292 states have call successors, (7409) [2023-12-02 18:40:56,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25564 states to 25564 states and 36641 transitions. [2023-12-02 18:40:56,434 INFO L78 Accepts]: Start accepts. Automaton has 25564 states and 36641 transitions. Word has length 200 [2023-12-02 18:40:56,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:40:56,434 INFO L495 AbstractCegarLoop]: Abstraction has 25564 states and 36641 transitions. [2023-12-02 18:40:56,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-12-02 18:40:56,435 INFO L276 IsEmpty]: Start isEmpty. Operand 25564 states and 36641 transitions. [2023-12-02 18:40:56,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-12-02 18:40:56,458 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:40:56,458 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:40:56,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 18:40:56,458 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:40:56,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:40:56,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1162754961, now seen corresponding path program 1 times [2023-12-02 18:40:56,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:40:56,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176414488] [2023-12-02 18:40:56,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:40:56,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:40:56,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:57,500 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2023-12-02 18:40:57,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:40:57,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176414488] [2023-12-02 18:40:57,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176414488] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:40:57,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:40:57,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 18:40:57,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104448740] [2023-12-02 18:40:57,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:40:57,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 18:40:57,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:40:57,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 18:40:57,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:40:57,504 INFO L87 Difference]: Start difference. First operand 25564 states and 36641 transitions. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 8 states have internal predecessors, (99), 5 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2023-12-02 18:41:09,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:41:11,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:41:13,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:41:15,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:41:17,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:41:19,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:41:23,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:41:25,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:41:27,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:41:29,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:41:32,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:41:34,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:41:36,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:41:38,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:41:40,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:41:40,183 INFO L93 Difference]: Finished difference Result 50253 states and 72012 transitions. [2023-12-02 18:41:40,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 18:41:40,184 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 8 states have internal predecessors, (99), 5 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) Word has length 201 [2023-12-02 18:41:40,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:41:40,229 INFO L225 Difference]: With dead ends: 50253 [2023-12-02 18:41:40,229 INFO L226 Difference]: Without dead ends: 22635 [2023-12-02 18:41:40,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-12-02 18:41:40,268 INFO L413 NwaCegarLoop]: 1274 mSDtfsCounter, 2804 mSDsluCounter, 5639 mSDsCounter, 0 mSdLazyCounter, 8663 mSolverCounterSat, 1655 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3207 SdHoareTripleChecker+Valid, 6913 SdHoareTripleChecker+Invalid, 10332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1655 IncrementalHoareTripleChecker+Valid, 8663 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:41:40,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3207 Valid, 6913 Invalid, 10332 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1655 Valid, 8663 Invalid, 14 Unknown, 0 Unchecked, 41.5s Time] [2023-12-02 18:41:40,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22635 states. [2023-12-02 18:41:41,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22635 to 22332. [2023-12-02 18:41:41,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22332 states, 14479 states have (on average 1.3143863526486637) internal successors, (19031), 14774 states have internal predecessors, (19031), 6432 states have call successors, (6432), 1361 states have call predecessors, (6432), 1420 states have return successors, (6513), 6434 states have call predecessors, (6513), 6431 states have call successors, (6513) [2023-12-02 18:41:41,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22332 states to 22332 states and 31976 transitions. [2023-12-02 18:41:41,086 INFO L78 Accepts]: Start accepts. Automaton has 22332 states and 31976 transitions. Word has length 201 [2023-12-02 18:41:41,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:41:41,087 INFO L495 AbstractCegarLoop]: Abstraction has 22332 states and 31976 transitions. [2023-12-02 18:41:41,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 8 states have internal predecessors, (99), 5 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2023-12-02 18:41:41,087 INFO L276 IsEmpty]: Start isEmpty. Operand 22332 states and 31976 transitions. [2023-12-02 18:41:41,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-12-02 18:41:41,105 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:41:41,105 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:41:41,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 18:41:41,106 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:41:41,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:41:41,106 INFO L85 PathProgramCache]: Analyzing trace with hash -2137875330, now seen corresponding path program 1 times [2023-12-02 18:41:41,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:41:41,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594571133] [2023-12-02 18:41:41,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:41,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:41:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-12-02 18:41:41,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:41:41,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594571133] [2023-12-02 18:41:41,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594571133] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:41:41,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121109075] [2023-12-02 18:41:41,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:41,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:41:41,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdc919d-eb57-49cf-b18c-1cf3991ac776/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:41:41,865 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdc919d-eb57-49cf-b18c-1cf3991ac776/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:41:41,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fdc919d-eb57-49cf-b18c-1cf3991ac776/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 18:41:43,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:43,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 5414 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 18:41:43,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:41:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-12-02 18:41:43,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:41:43,203 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-12-02 18:41:43,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121109075] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:41:43,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1326818482] [2023-12-02 18:41:43,223 INFO L159 IcfgInterpreter]: Started Sifa with 131 locations of interest [2023-12-02 18:41:43,223 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:41:43,226 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:41:43,230 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:41:43,230 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:45:39,703 WARN L293 SmtUtils]: Spent 9.77s on a formula simplification that was a NOOP. DAG size: 5595 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 18:45:49,474 WARN L293 SmtUtils]: Spent 9.76s on a formula simplification that was a NOOP. DAG size: 5595 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 18:46:04,318 WARN L293 SmtUtils]: Spent 14.82s on a formula simplification. DAG size of input: 5598 DAG size of output: 5594 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 18:46:14,320 WARN L293 SmtUtils]: Spent 10.00s on a formula simplification that was a NOOP. DAG size: 5595 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 18:46:24,200 WARN L293 SmtUtils]: Spent 9.87s on a formula simplification that was a NOOP. DAG size: 5595 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 18:46:39,230 WARN L293 SmtUtils]: Spent 15.01s on a formula simplification. DAG size of input: 5598 DAG size of output: 5594 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 18:47:09,470 WARN L293 SmtUtils]: Spent 10.07s on a formula simplification that was a NOOP. DAG size: 5466 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-02 18:49:00,311 WARN L293 SmtUtils]: Spent 9.75s on a formula simplification that was a NOOP. DAG size: 5469 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-02 18:51:22,109 WARN L293 SmtUtils]: Spent 9.98s on a formula simplification that was a NOOP. DAG size: 5466 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)