./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-c0cc359-104_1a-drivers--usb--serial--qcserial.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_ab940d28-5243-4f37-bf13-29f867be63fa/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab940d28-5243-4f37-bf13-29f867be63fa/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_ab940d28-5243-4f37-bf13-29f867be63fa/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab940d28-5243-4f37-bf13-29f867be63fa/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-c0cc359-104_1a-drivers--usb--serial--qcserial.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab940d28-5243-4f37-bf13-29f867be63fa/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_ab940d28-5243-4f37-bf13-29f867be63fa/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 c8a07fe1a25f7f87a80e2b435a79d4715298ae698f37888069e22026322224ef --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:20:42,962 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:20:43,023 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab940d28-5243-4f37-bf13-29f867be63fa/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 13:20:43,028 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:20:43,028 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:20:43,052 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:20:43,052 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:20:43,052 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:20:43,053 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:20:43,054 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:20:43,054 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:20:43,055 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:20:43,055 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:20:43,056 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 13:20:43,056 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:20:43,057 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:20:43,057 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 13:20:43,058 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 13:20:43,058 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:20:43,059 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 13:20:43,060 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 13:20:43,060 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 13:20:43,061 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:20:43,061 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 13:20:43,062 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 13:20:43,062 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:20:43,063 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 13:20:43,063 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:20:43,064 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 13:20:43,064 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 13:20:43,065 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:20:43,065 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:20:43,065 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:20:43,066 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:20:43,066 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:20:43,066 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:20:43,066 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:20:43,067 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 13:20:43,067 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 13:20:43,067 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 13:20:43,067 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:20:43,067 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 13:20:43,068 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:20:43,068 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:20:43,068 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_ab940d28-5243-4f37-bf13-29f867be63fa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab940d28-5243-4f37-bf13-29f867be63fa/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8a07fe1a25f7f87a80e2b435a79d4715298ae698f37888069e22026322224ef [2023-12-02 13:20:43,258 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:20:43,278 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:20:43,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:20:43,282 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:20:43,283 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:20:43,284 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab940d28-5243-4f37-bf13-29f867be63fa/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-c0cc359-104_1a-drivers--usb--serial--qcserial.ko-entry_point.cil.out.i [2023-12-02 13:20:46,080 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:20:46,416 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:20:46,416 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab940d28-5243-4f37-bf13-29f867be63fa/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-c0cc359-104_1a-drivers--usb--serial--qcserial.ko-entry_point.cil.out.i [2023-12-02 13:20:46,448 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab940d28-5243-4f37-bf13-29f867be63fa/bin/utaipan-verify-nQ1chXbOIh/data/c910bf915/c5616a8c050a4911b7221d24100716d0/FLAG4965cfe44 [2023-12-02 13:20:46,462 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab940d28-5243-4f37-bf13-29f867be63fa/bin/utaipan-verify-nQ1chXbOIh/data/c910bf915/c5616a8c050a4911b7221d24100716d0 [2023-12-02 13:20:46,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:20:46,466 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:20:46,467 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:20:46,467 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:20:46,472 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:20:46,473 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:20:46" (1/1) ... [2023-12-02 13:20:46,474 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@500c80d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:46, skipping insertion in model container [2023-12-02 13:20:46,474 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:20:46" (1/1) ... [2023-12-02 13:20:46,547 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:20:46,981 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_ab940d28-5243-4f37-bf13-29f867be63fa/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-c0cc359-104_1a-drivers--usb--serial--qcserial.ko-entry_point.cil.out.i[95017,95030] [2023-12-02 13:20:47,208 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:20:47,253 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:20:47,359 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_ab940d28-5243-4f37-bf13-29f867be63fa/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-c0cc359-104_1a-drivers--usb--serial--qcserial.ko-entry_point.cil.out.i[95017,95030] [2023-12-02 13:20:47,450 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:20:47,502 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:20:47,502 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:47 WrapperNode [2023-12-02 13:20:47,502 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:20:47,503 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:20:47,504 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:20:47,504 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:20:47,511 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:47" (1/1) ... [2023-12-02 13:20:47,545 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:47" (1/1) ... [2023-12-02 13:20:47,615 INFO L138 Inliner]: procedures = 96, calls = 1035, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 1894 [2023-12-02 13:20:47,616 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:20:47,617 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:20:47,617 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:20:47,617 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:20:47,626 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:47" (1/1) ... [2023-12-02 13:20:47,626 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:47" (1/1) ... [2023-12-02 13:20:47,640 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:47" (1/1) ... [2023-12-02 13:20:47,641 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:47" (1/1) ... [2023-12-02 13:20:47,681 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:47" (1/1) ... [2023-12-02 13:20:47,690 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:47" (1/1) ... [2023-12-02 13:20:47,699 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:47" (1/1) ... [2023-12-02 13:20:47,708 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:47" (1/1) ... [2023-12-02 13:20:47,720 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:20:47,721 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:20:47,721 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:20:47,721 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:20:47,722 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:47" (1/1) ... [2023-12-02 13:20:47,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:20:47,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab940d28-5243-4f37-bf13-29f867be63fa/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:20:47,748 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab940d28-5243-4f37-bf13-29f867be63fa/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:20:47,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab940d28-5243-4f37-bf13-29f867be63fa/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:20:47,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 13:20:47,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 13:20:47,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 13:20:47,781 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_serial_data [2023-12-02 13:20:47,781 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_serial_data [2023-12-02 13:20:47,781 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_open [2023-12-02 13:20:47,781 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_open [2023-12-02 13:20:47,782 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-12-02 13:20:47,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-12-02 13:20:47,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 13:20:47,782 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_negative [2023-12-02 13:20:47,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_negative [2023-12-02 13:20:47,782 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_interface [2023-12-02 13:20:47,782 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_interface [2023-12-02 13:20:47,782 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2023-12-02 13:20:47,783 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2023-12-02 13:20:47,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 13:20:47,783 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2023-12-02 13:20:47,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2023-12-02 13:20:47,783 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_resume [2023-12-02 13:20:47,783 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_resume [2023-12-02 13:20:47,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 13:20:47,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 13:20:47,784 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-12-02 13:20:47,784 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-12-02 13:20:47,784 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-12-02 13:20:47,784 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-12-02 13:20:47,784 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_disconnect [2023-12-02 13:20:47,784 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_disconnect [2023-12-02 13:20:47,784 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-12-02 13:20:47,785 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-12-02 13:20:47,785 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-12-02 13:20:47,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-12-02 13:20:47,785 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister [2023-12-02 13:20:47,785 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister [2023-12-02 13:20:47,785 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_disconnect [2023-12-02 13:20:47,785 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_disconnect [2023-12-02 13:20:47,785 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_write [2023-12-02 13:20:47,785 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_write [2023-12-02 13:20:47,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-12-02 13:20:47,786 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-12-02 13:20:47,786 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_write_room [2023-12-02 13:20:47,786 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_write_room [2023-12-02 13:20:47,786 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_suspend [2023-12-02 13:20:47,786 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_suspend [2023-12-02 13:20:47,786 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 13:20:47,786 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 13:20:47,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 13:20:47,786 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_close [2023-12-02 13:20:47,787 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_close [2023-12-02 13:20:47,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 13:20:47,787 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-12-02 13:20:47,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-12-02 13:20:47,787 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_chars_in_buffer [2023-12-02 13:20:47,787 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_chars_in_buffer [2023-12-02 13:20:47,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:20:47,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:20:48,043 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:20:48,045 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:20:48,125 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-12-02 13:20:49,808 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:20:50,127 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:20:50,128 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 13:20:50,129 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:20:50 BoogieIcfgContainer [2023-12-02 13:20:50,130 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:20:50,132 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:20:50,132 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:20:50,136 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:20:50,136 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:20:46" (1/3) ... [2023-12-02 13:20:50,137 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d5363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:20:50, skipping insertion in model container [2023-12-02 13:20:50,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:20:47" (2/3) ... [2023-12-02 13:20:50,137 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d5363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:20:50, skipping insertion in model container [2023-12-02 13:20:50,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:20:50" (3/3) ... [2023-12-02 13:20:50,138 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-stable-c0cc359-104_1a-drivers--usb--serial--qcserial.ko-entry_point.cil.out.i [2023-12-02 13:20:50,157 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:20:50,157 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 13:20:50,213 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:20:50,220 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;@3d6d6f2d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:20:50,220 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 13:20:50,226 INFO L276 IsEmpty]: Start isEmpty. Operand has 321 states, 213 states have (on average 1.4507042253521127) internal successors, (309), 221 states have internal predecessors, (309), 84 states have call successors, (84), 23 states have call predecessors, (84), 22 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2023-12-02 13:20:50,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 13:20:50,238 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:50,239 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-12-02 13:20:50,240 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:20:50,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:50,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1345758600, now seen corresponding path program 1 times [2023-12-02 13:20:50,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:50,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079503084] [2023-12-02 13:20:50,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:50,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:50,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 13:20:50,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:50,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079503084] [2023-12-02 13:20:50,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079503084] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:20:50,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:20:50,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:20:50,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900272250] [2023-12-02 13:20:50,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:20:50,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:20:50,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:50,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:20:50,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:20:50,905 INFO L87 Difference]: Start difference. First operand has 321 states, 213 states have (on average 1.4507042253521127) internal successors, (309), 221 states have internal predecessors, (309), 84 states have call successors, (84), 23 states have call predecessors, (84), 22 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 13:20:51,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:51,286 INFO L93 Difference]: Finished difference Result 909 states and 1343 transitions. [2023-12-02 13:20:51,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:20:51,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2023-12-02 13:20:51,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:51,305 INFO L225 Difference]: With dead ends: 909 [2023-12-02 13:20:51,305 INFO L226 Difference]: Without dead ends: 588 [2023-12-02 13:20:51,311 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 13:20:51,314 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 423 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:51,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 815 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:20:51,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2023-12-02 13:20:51,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 588. [2023-12-02 13:20:51,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 400 states have (on average 1.425) internal successors, (570), 402 states have internal predecessors, (570), 146 states have call successors, (146), 42 states have call predecessors, (146), 41 states have return successors, (145), 145 states have call predecessors, (145), 145 states have call successors, (145) [2023-12-02 13:20:51,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 861 transitions. [2023-12-02 13:20:51,434 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 861 transitions. Word has length 43 [2023-12-02 13:20:51,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:51,435 INFO L495 AbstractCegarLoop]: Abstraction has 588 states and 861 transitions. [2023-12-02 13:20:51,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 13:20:51,435 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 861 transitions. [2023-12-02 13:20:51,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 13:20:51,439 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:51,439 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-12-02 13:20:51,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 13:20:51,440 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:20:51,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:51,441 INFO L85 PathProgramCache]: Analyzing trace with hash 919663951, now seen corresponding path program 1 times [2023-12-02 13:20:51,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:51,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656370144] [2023-12-02 13:20:51,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:51,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:51,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:51,720 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 13:20:51,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:51,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656370144] [2023-12-02 13:20:51,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656370144] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:20:51,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:20:51,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:20:51,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373250115] [2023-12-02 13:20:51,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:20:51,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:20:51,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:51,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:20:51,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:20:51,724 INFO L87 Difference]: Start difference. First operand 588 states and 861 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 13:20:51,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:51,957 INFO L93 Difference]: Finished difference Result 970 states and 1417 transitions. [2023-12-02 13:20:51,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:20:51,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2023-12-02 13:20:51,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:51,967 INFO L225 Difference]: With dead ends: 970 [2023-12-02 13:20:51,967 INFO L226 Difference]: Without dead ends: 961 [2023-12-02 13:20:51,968 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 13:20:51,970 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 286 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:51,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 801 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:20:51,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2023-12-02 13:20:52,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 953. [2023-12-02 13:20:52,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 659 states have (on average 1.4446130500758725) internal successors, (952), 665 states have internal predecessors, (952), 223 states have call successors, (223), 71 states have call predecessors, (223), 70 states have return successors, (222), 218 states have call predecessors, (222), 222 states have call successors, (222) [2023-12-02 13:20:52,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1397 transitions. [2023-12-02 13:20:52,022 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1397 transitions. Word has length 43 [2023-12-02 13:20:52,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:52,023 INFO L495 AbstractCegarLoop]: Abstraction has 953 states and 1397 transitions. [2023-12-02 13:20:52,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 13:20:52,023 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1397 transitions. [2023-12-02 13:20:52,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-02 13:20:52,029 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:52,029 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-12-02 13:20:52,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 13:20:52,029 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:20:52,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:52,030 INFO L85 PathProgramCache]: Analyzing trace with hash 2000020090, now seen corresponding path program 1 times [2023-12-02 13:20:52,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:52,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773618388] [2023-12-02 13:20:52,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:52,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:52,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:52,261 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 13:20:52,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:52,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773618388] [2023-12-02 13:20:52,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773618388] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:20:52,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:20:52,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:20:52,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245002474] [2023-12-02 13:20:52,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:20:52,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:20:52,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:52,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:20:52,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:20:52,264 INFO L87 Difference]: Start difference. First operand 953 states and 1397 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 13:20:52,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:52,571 INFO L93 Difference]: Finished difference Result 2067 states and 3023 transitions. [2023-12-02 13:20:52,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:20:52,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 59 [2023-12-02 13:20:52,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:52,580 INFO L225 Difference]: With dead ends: 2067 [2023-12-02 13:20:52,580 INFO L226 Difference]: Without dead ends: 1128 [2023-12-02 13:20:52,582 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 13:20:52,584 INFO L413 NwaCegarLoop]: 412 mSDtfsCounter, 92 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:52,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 721 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:20:52,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2023-12-02 13:20:52,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1119. [2023-12-02 13:20:52,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 798 states have (on average 1.4511278195488722) internal successors, (1158), 804 states have internal predecessors, (1158), 238 states have call successors, (238), 83 states have call predecessors, (238), 82 states have return successors, (237), 233 states have call predecessors, (237), 237 states have call successors, (237) [2023-12-02 13:20:52,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1633 transitions. [2023-12-02 13:20:52,643 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1633 transitions. Word has length 59 [2023-12-02 13:20:52,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:52,644 INFO L495 AbstractCegarLoop]: Abstraction has 1119 states and 1633 transitions. [2023-12-02 13:20:52,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 13:20:52,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1633 transitions. [2023-12-02 13:20:52,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-02 13:20:52,648 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:52,648 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2023-12-02 13:20:52,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 13:20:52,649 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:20:52,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:52,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1197399175, now seen corresponding path program 1 times [2023-12-02 13:20:52,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:52,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173853015] [2023-12-02 13:20:52,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:52,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:52,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-12-02 13:20:53,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:53,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173853015] [2023-12-02 13:20:53,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173853015] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:20:53,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:20:53,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:20:53,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646113139] [2023-12-02 13:20:53,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:20:53,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:20:53,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:53,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:20:53,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:20:53,891 INFO L87 Difference]: Start difference. First operand 1119 states and 1633 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2023-12-02 13:20:54,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:54,580 INFO L93 Difference]: Finished difference Result 1762 states and 2584 transitions. [2023-12-02 13:20:54,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:20:54,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) Word has length 88 [2023-12-02 13:20:54,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:54,595 INFO L225 Difference]: With dead ends: 1762 [2023-12-02 13:20:54,596 INFO L226 Difference]: Without dead ends: 1753 [2023-12-02 13:20:54,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:20:54,598 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 614 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 1141 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:54,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [679 Valid, 1141 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 13:20:54,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2023-12-02 13:20:54,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 1691. [2023-12-02 13:20:54,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1220 states have (on average 1.4581967213114755) internal successors, (1779), 1232 states have internal predecessors, (1779), 350 states have call successors, (350), 121 states have call predecessors, (350), 120 states have return successors, (349), 341 states have call predecessors, (349), 349 states have call successors, (349) [2023-12-02 13:20:54,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 2478 transitions. [2023-12-02 13:20:54,682 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 2478 transitions. Word has length 88 [2023-12-02 13:20:54,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:54,682 INFO L495 AbstractCegarLoop]: Abstraction has 1691 states and 2478 transitions. [2023-12-02 13:20:54,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 1 states have call predecessors, (9), 1 states have call successors, (9) [2023-12-02 13:20:54,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 2478 transitions. [2023-12-02 13:20:54,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-02 13:20:54,686 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:54,686 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2023-12-02 13:20:54,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 13:20:54,687 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:20:54,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:54,687 INFO L85 PathProgramCache]: Analyzing trace with hash 543809656, now seen corresponding path program 1 times [2023-12-02 13:20:54,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:54,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022510276] [2023-12-02 13:20:54,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:54,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:54,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:55,108 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-02 13:20:55,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:55,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022510276] [2023-12-02 13:20:55,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022510276] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:20:55,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046696632] [2023-12-02 13:20:55,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:55,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:20:55,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab940d28-5243-4f37-bf13-29f867be63fa/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:20:55,113 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab940d28-5243-4f37-bf13-29f867be63fa/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:20:55,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab940d28-5243-4f37-bf13-29f867be63fa/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 13:20:55,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:55,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 2529 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 13:20:55,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:20:55,737 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-12-02 13:20:55,737 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:20:55,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046696632] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:20:55,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:20:55,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-12-02 13:20:55,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761825616] [2023-12-02 13:20:55,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:20:55,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:20:55,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:55,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:20:55,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:20:55,740 INFO L87 Difference]: Start difference. First operand 1691 states and 2478 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 13:20:56,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:56,172 INFO L93 Difference]: Finished difference Result 3518 states and 5120 transitions. [2023-12-02 13:20:56,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:20:56,173 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 92 [2023-12-02 13:20:56,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:56,183 INFO L225 Difference]: With dead ends: 3518 [2023-12-02 13:20:56,184 INFO L226 Difference]: Without dead ends: 1837 [2023-12-02 13:20:56,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:20:56,187 INFO L413 NwaCegarLoop]: 766 mSDtfsCounter, 425 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 1927 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:56,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 1927 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:20:56,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1837 states. [2023-12-02 13:20:56,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1837 to 1723. [2023-12-02 13:20:56,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1240 states have (on average 1.4508064516129033) internal successors, (1799), 1255 states have internal predecessors, (1799), 356 states have call successors, (356), 127 states have call predecessors, (356), 126 states have return successors, (355), 344 states have call predecessors, (355), 355 states have call successors, (355) [2023-12-02 13:20:56,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 2510 transitions. [2023-12-02 13:20:56,278 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 2510 transitions. Word has length 92 [2023-12-02 13:20:56,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:56,278 INFO L495 AbstractCegarLoop]: Abstraction has 1723 states and 2510 transitions. [2023-12-02 13:20:56,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 13:20:56,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 2510 transitions. [2023-12-02 13:20:56,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-12-02 13:20:56,282 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:56,282 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 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] [2023-12-02 13:20:56,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab940d28-5243-4f37-bf13-29f867be63fa/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 13:20:56,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab940d28-5243-4f37-bf13-29f867be63fa/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:20:56,483 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:20:56,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:56,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1131543468, now seen corresponding path program 1 times [2023-12-02 13:20:56,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:56,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476822120] [2023-12-02 13:20:56,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:56,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:57,051 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-12-02 13:20:57,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:57,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476822120] [2023-12-02 13:20:57,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476822120] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:20:57,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478258397] [2023-12-02 13:20:57,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:57,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:20:57,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab940d28-5243-4f37-bf13-29f867be63fa/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:20:57,053 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab940d28-5243-4f37-bf13-29f867be63fa/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:20:57,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab940d28-5243-4f37-bf13-29f867be63fa/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 13:20:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:57,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 2616 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 13:20:57,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:20:57,715 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 13:20:57,716 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:20:57,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478258397] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:20:57,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:20:57,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-12-02 13:20:57,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441198014] [2023-12-02 13:20:57,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:20:57,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:20:57,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:57,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:20:57,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:20:57,718 INFO L87 Difference]: Start difference. First operand 1723 states and 2510 transitions. Second operand has 4 states, 3 states have (on average 18.666666666666668) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-12-02 13:20:57,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:20:57,990 INFO L93 Difference]: Finished difference Result 3432 states and 5004 transitions. [2023-12-02 13:20:57,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:20:57,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 18.666666666666668) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 99 [2023-12-02 13:20:57,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:20:58,002 INFO L225 Difference]: With dead ends: 3432 [2023-12-02 13:20:58,002 INFO L226 Difference]: Without dead ends: 1724 [2023-12-02 13:20:58,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:20:58,007 INFO L413 NwaCegarLoop]: 402 mSDtfsCounter, 1 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1203 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:20:58,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1203 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:20:58,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1724 states. [2023-12-02 13:20:58,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1724 to 1724. [2023-12-02 13:20:58,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1241 states have (on average 1.4504431909750202) internal successors, (1800), 1256 states have internal predecessors, (1800), 356 states have call successors, (356), 127 states have call predecessors, (356), 126 states have return successors, (355), 344 states have call predecessors, (355), 355 states have call successors, (355) [2023-12-02 13:20:58,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 2511 transitions. [2023-12-02 13:20:58,129 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 2511 transitions. Word has length 99 [2023-12-02 13:20:58,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:20:58,129 INFO L495 AbstractCegarLoop]: Abstraction has 1724 states and 2511 transitions. [2023-12-02 13:20:58,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 18.666666666666668) internal successors, (56), 4 states have internal predecessors, (56), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-12-02 13:20:58,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 2511 transitions. [2023-12-02 13:20:58,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-12-02 13:20:58,133 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:20:58,134 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 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] [2023-12-02 13:20:58,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab940d28-5243-4f37-bf13-29f867be63fa/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 13:20:58,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab940d28-5243-4f37-bf13-29f867be63fa/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-02 13:20:58,336 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:20:58,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:20:58,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1272737330, now seen corresponding path program 1 times [2023-12-02 13:20:58,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:20:58,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749420088] [2023-12-02 13:20:58,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:58,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:20:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-12-02 13:20:58,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:20:58,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749420088] [2023-12-02 13:20:58,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749420088] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:20:58,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880376001] [2023-12-02 13:20:58,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:20:58,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:20:58,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab940d28-5243-4f37-bf13-29f867be63fa/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:20:58,999 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab940d28-5243-4f37-bf13-29f867be63fa/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:20:59,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ab940d28-5243-4f37-bf13-29f867be63fa/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 13:20:59,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:20:59,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 2646 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 13:20:59,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:20:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-02 13:20:59,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:20:59,747 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-12-02 13:20:59,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880376001] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:20:59,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [845436271] [2023-12-02 13:20:59,769 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2023-12-02 13:20:59,769 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:20:59,771 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:20:59,775 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:20:59,776 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:22:25,169 WARN L293 SmtUtils]: Spent 5.74s on a formula simplification. DAG size of input: 4444 DAG size of output: 4440 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 13:22:38,640 WARN L293 SmtUtils]: Spent 5.70s on a formula simplification. DAG size of input: 4444 DAG size of output: 4440 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 13:26:33,447 WARN L293 SmtUtils]: Spent 7.57s on a formula simplification that was a NOOP. DAG size: 4466 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 13:26:41,024 WARN L293 SmtUtils]: Spent 7.51s on a formula simplification that was a NOOP. DAG size: 4466 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 13:28:32,713 WARN L293 SmtUtils]: Spent 6.30s on a formula simplification that was a NOOP. DAG size: 5960 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 13:28:32,761 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 144 for LOIs [2023-12-02 13:28:32,799 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_zalloc with input of size 103 for LOIs [2023-12-02 13:28:32,863 INFO L197 IcfgInterpreter]: Interpreting procedure usb_serial_deregister with input of size 120 for LOIs [2023-12-02 13:28:32,902 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 150 for LOIs [2023-12-02 13:28:33,181 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:29:53,082 WARN L293 SmtUtils]: Spent 1.33m on a formula simplification. DAG size of input: 2940 DAG size of output: 2936 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:32:42,436 WARN L293 SmtUtils]: Spent 2.70m on a formula simplification. DAG size of input: 4440 DAG size of output: 4438 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)