./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_4966180a-cda3-4e7e-ad47-12115721bc34/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4966180a-cda3-4e7e-ad47-12115721bc34/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4966180a-cda3-4e7e-ad47-12115721bc34/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4966180a-cda3-4e7e-ad47-12115721bc34/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4966180a-cda3-4e7e-ad47-12115721bc34/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4966180a-cda3-4e7e-ad47-12115721bc34/bin/utaipan-verify-NcY6lQBIFX --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 75d232d8f5b5300b961fad2246cc6bf62d9846d1616b34b46b949e6c32c2a93b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:49:51,149 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:49:51,235 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4966180a-cda3-4e7e-ad47-12115721bc34/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 00:49:51,247 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:49:51,248 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:49:51,294 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:49:51,295 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:49:51,296 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:49:51,297 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:49:51,302 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:49:51,302 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:49:51,303 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:49:51,304 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:49:51,306 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:49:51,306 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:49:51,306 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:49:51,307 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:49:51,307 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:49:51,308 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:49:51,308 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:49:51,310 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:49:51,311 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:49:51,312 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:49:51,313 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:49:51,313 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:49:51,313 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:49:51,314 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:49:51,314 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:49:51,315 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:49:51,327 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:49:51,328 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:49:51,328 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:49:51,329 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:49:51,329 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:49:51,329 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:49:51,330 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:49:51,330 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:49:51,330 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:49:51,330 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:49:51,331 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:49:51,331 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:49:51,331 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:49:51,331 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_4966180a-cda3-4e7e-ad47-12115721bc34/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4966180a-cda3-4e7e-ad47-12115721bc34/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 75d232d8f5b5300b961fad2246cc6bf62d9846d1616b34b46b949e6c32c2a93b [2023-11-12 00:49:51,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:49:51,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:49:51,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:49:51,613 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:49:51,613 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:49:51,615 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4966180a-cda3-4e7e-ad47-12115721bc34/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i [2023-11-12 00:49:54,855 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:49:55,376 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:49:55,377 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4966180a-cda3-4e7e-ad47-12115721bc34/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i [2023-11-12 00:49:55,422 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4966180a-cda3-4e7e-ad47-12115721bc34/bin/utaipan-verify-NcY6lQBIFX/data/8f66e730e/62f4e3c8fd35493ea592d5270d58b57c/FLAG7e1478a7b [2023-11-12 00:49:55,447 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4966180a-cda3-4e7e-ad47-12115721bc34/bin/utaipan-verify-NcY6lQBIFX/data/8f66e730e/62f4e3c8fd35493ea592d5270d58b57c [2023-11-12 00:49:55,453 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:49:55,456 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:49:55,460 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:49:55,460 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:49:55,466 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:49:55,470 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:49:55" (1/1) ... [2023-11-12 00:49:55,471 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a34c491 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:55, skipping insertion in model container [2023-11-12 00:49:55,471 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:49:55" (1/1) ... [2023-11-12 00:49:55,574 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:49:56,457 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_4966180a-cda3-4e7e-ad47-12115721bc34/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i[133500,133513] [2023-11-12 00:49:56,471 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:49:56,586 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:49:56,901 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_4966180a-cda3-4e7e-ad47-12115721bc34/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i[133500,133513] [2023-11-12 00:49:56,914 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:49:56,997 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:49:56,998 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:56 WrapperNode [2023-11-12 00:49:56,998 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:49:57,000 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:49:57,000 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:49:57,001 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:49:57,008 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:56" (1/1) ... [2023-11-12 00:49:57,068 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:56" (1/1) ... [2023-11-12 00:49:57,200 INFO L138 Inliner]: procedures = 94, calls = 1038, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 1852 [2023-11-12 00:49:57,201 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:49:57,202 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:49:57,202 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:49:57,203 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:49:57,214 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:56" (1/1) ... [2023-11-12 00:49:57,214 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:56" (1/1) ... [2023-11-12 00:49:57,242 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:56" (1/1) ... [2023-11-12 00:49:57,245 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:56" (1/1) ... [2023-11-12 00:49:57,324 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:56" (1/1) ... [2023-11-12 00:49:57,350 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:56" (1/1) ... [2023-11-12 00:49:57,359 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:56" (1/1) ... [2023-11-12 00:49:57,369 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:56" (1/1) ... [2023-11-12 00:49:57,390 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:49:57,391 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:49:57,392 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:49:57,392 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:49:57,393 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:56" (1/1) ... [2023-11-12 00:49:57,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:49:57,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4966180a-cda3-4e7e-ad47-12115721bc34/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:49:57,434 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4966180a-cda3-4e7e-ad47-12115721bc34/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:49:57,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4966180a-cda3-4e7e-ad47-12115721bc34/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:49:57,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:49:57,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:49:57,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:49:57,480 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_serial_data [2023-11-12 00:49:57,480 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_serial_data [2023-11-12 00:49:57,480 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_open [2023-11-12 00:49:57,480 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_open [2023-11-12 00:49:57,480 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-12 00:49:57,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-12 00:49:57,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:49:57,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-12 00:49:57,485 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-12 00:49:57,485 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_negative [2023-11-12 00:49:57,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_negative [2023-11-12 00:49:57,485 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_interface [2023-11-12 00:49:57,486 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_interface [2023-11-12 00:49:57,486 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2023-11-12 00:49:57,486 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2023-11-12 00:49:57,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:49:57,486 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2023-11-12 00:49:57,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2023-11-12 00:49:57,487 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_resume [2023-11-12 00:49:57,488 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_resume [2023-11-12 00:49:57,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:49:57,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:49:57,488 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-12 00:49:57,489 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-12 00:49:57,489 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-12 00:49:57,490 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-12 00:49:57,490 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_disconnect [2023-11-12 00:49:57,490 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_disconnect [2023-11-12 00:49:57,491 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-12 00:49:57,491 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-12 00:49:57,491 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister [2023-11-12 00:49:57,491 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister [2023-11-12 00:49:57,492 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_disconnect [2023-11-12 00:49:57,492 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_disconnect [2023-11-12 00:49:57,492 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_write [2023-11-12 00:49:57,492 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_write [2023-11-12 00:49:57,492 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_write_room [2023-11-12 00:49:57,492 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_write_room [2023-11-12 00:49:57,493 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_suspend [2023-11-12 00:49:57,493 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_suspend [2023-11-12 00:49:57,493 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-12 00:49:57,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-12 00:49:57,493 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 00:49:57,493 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 00:49:57,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:49:57,494 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_close [2023-11-12 00:49:57,494 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_close [2023-11-12 00:49:57,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:49:57,494 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_chars_in_buffer [2023-11-12 00:49:57,494 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_chars_in_buffer [2023-11-12 00:49:57,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:49:57,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:49:57,495 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-11-12 00:49:57,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-11-12 00:49:57,842 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:49:57,845 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:49:57,950 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-12 00:50:00,134 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:50:00,619 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:50:00,620 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-12 00:50:00,624 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:50:00 BoogieIcfgContainer [2023-11-12 00:50:00,624 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:50:00,627 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:50:00,628 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:50:00,631 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:50:00,632 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:49:55" (1/3) ... [2023-11-12 00:50:00,632 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c885417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:50:00, skipping insertion in model container [2023-11-12 00:50:00,633 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:56" (2/3) ... [2023-11-12 00:50:00,633 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c885417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:50:00, skipping insertion in model container [2023-11-12 00:50:00,634 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:50:00" (3/3) ... [2023-11-12 00:50:00,635 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i [2023-11-12 00:50:00,658 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:50:00,658 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:50:00,724 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:50:00,731 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;@480dc057, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:50:00,731 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:50:00,738 INFO L276 IsEmpty]: Start isEmpty. Operand has 317 states, 212 states have (on average 1.4481132075471699) internal successors, (307), 219 states have internal predecessors, (307), 81 states have call successors, (81), 23 states have call predecessors, (81), 22 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2023-11-12 00:50:00,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-12 00:50:00,753 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:00,754 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:50:00,755 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:50:00,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:00,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1543221131, now seen corresponding path program 1 times [2023-11-12 00:50:00,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:00,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737214475] [2023-11-12 00:50:00,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:00,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:01,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-12 00:50:01,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:01,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737214475] [2023-11-12 00:50:01,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737214475] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:01,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:50:01,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:50:01,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992776097] [2023-11-12 00:50:01,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:01,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:50:01,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:01,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:50:01,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:50:01,853 INFO L87 Difference]: Start difference. First operand has 317 states, 212 states have (on average 1.4481132075471699) internal successors, (307), 219 states have internal predecessors, (307), 81 states have call successors, (81), 23 states have call predecessors, (81), 22 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-12 00:50:02,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:02,327 INFO L93 Difference]: Finished difference Result 896 states and 1315 transitions. [2023-11-12 00:50:02,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:50:02,329 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 65 [2023-11-12 00:50:02,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:02,356 INFO L225 Difference]: With dead ends: 896 [2023-11-12 00:50:02,357 INFO L226 Difference]: Without dead ends: 581 [2023-11-12 00:50:02,367 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 [2023-11-12 00:50:02,377 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 414 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:02,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 799 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:50:02,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2023-11-12 00:50:02,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 581. [2023-11-12 00:50:02,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 397 states have (on average 1.4231738035264483) internal successors, (565), 399 states have internal predecessors, (565), 140 states have call successors, (140), 43 states have call predecessors, (140), 43 states have return successors, (140), 140 states have call predecessors, (140), 140 states have call successors, (140) [2023-11-12 00:50:02,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 845 transitions. [2023-11-12 00:50:02,510 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 845 transitions. Word has length 65 [2023-11-12 00:50:02,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:02,511 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 845 transitions. [2023-11-12 00:50:02,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-12 00:50:02,511 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 845 transitions. [2023-11-12 00:50:02,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-12 00:50:02,515 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:02,516 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:50:02,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:50:02,516 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:50:02,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:02,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1431746579, now seen corresponding path program 1 times [2023-11-12 00:50:02,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:02,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760189053] [2023-11-12 00:50:02,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:02,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:02,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:02,856 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-12 00:50:02,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:02,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760189053] [2023-11-12 00:50:02,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760189053] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:02,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:50:02,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:50:02,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250003048] [2023-11-12 00:50:02,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:02,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:50:02,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:02,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:50:02,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:50:02,863 INFO L87 Difference]: Start difference. First operand 581 states and 845 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 00:50:03,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:03,192 INFO L93 Difference]: Finished difference Result 966 states and 1402 transitions. [2023-11-12 00:50:03,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:50:03,193 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 65 [2023-11-12 00:50:03,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:03,203 INFO L225 Difference]: With dead ends: 966 [2023-11-12 00:50:03,204 INFO L226 Difference]: Without dead ends: 958 [2023-11-12 00:50:03,205 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 [2023-11-12 00:50:03,206 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 288 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:03,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 782 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:50:03,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2023-11-12 00:50:03,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 950. [2023-11-12 00:50:03,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 656 states have (on average 1.4405487804878048) internal successors, (945), 662 states have internal predecessors, (945), 219 states have call successors, (219), 74 states have call predecessors, (219), 74 states have return successors, (219), 215 states have call predecessors, (219), 219 states have call successors, (219) [2023-11-12 00:50:03,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1383 transitions. [2023-11-12 00:50:03,302 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1383 transitions. Word has length 65 [2023-11-12 00:50:03,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:03,303 INFO L495 AbstractCegarLoop]: Abstraction has 950 states and 1383 transitions. [2023-11-12 00:50:03,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 00:50:03,304 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1383 transitions. [2023-11-12 00:50:03,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-12 00:50:03,309 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:03,309 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:50:03,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:50:03,309 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:50:03,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:03,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1789050391, now seen corresponding path program 1 times [2023-11-12 00:50:03,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:03,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631455565] [2023-11-12 00:50:03,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:03,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:03,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:03,635 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-12 00:50:03,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:03,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631455565] [2023-11-12 00:50:03,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631455565] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:03,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:50:03,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:50:03,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485239437] [2023-11-12 00:50:03,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:03,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:50:03,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:03,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:50:03,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:50:03,639 INFO L87 Difference]: Start difference. First operand 950 states and 1383 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2023-11-12 00:50:04,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:04,062 INFO L93 Difference]: Finished difference Result 2064 states and 2994 transitions. [2023-11-12 00:50:04,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:50:04,063 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 81 [2023-11-12 00:50:04,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:04,072 INFO L225 Difference]: With dead ends: 2064 [2023-11-12 00:50:04,072 INFO L226 Difference]: Without dead ends: 1130 [2023-11-12 00:50:04,076 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 [2023-11-12 00:50:04,077 INFO L413 NwaCegarLoop]: 403 mSDtfsCounter, 95 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:04,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 701 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:50:04,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2023-11-12 00:50:04,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 1122. [2023-11-12 00:50:04,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 795 states have (on average 1.4440251572327043) internal successors, (1148), 801 states have internal predecessors, (1148), 237 states have call successors, (237), 89 states have call predecessors, (237), 89 states have return successors, (237), 233 states have call predecessors, (237), 237 states have call successors, (237) [2023-11-12 00:50:04,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1622 transitions. [2023-11-12 00:50:04,154 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1622 transitions. Word has length 81 [2023-11-12 00:50:04,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:04,154 INFO L495 AbstractCegarLoop]: Abstraction has 1122 states and 1622 transitions. [2023-11-12 00:50:04,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2023-11-12 00:50:04,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1622 transitions. [2023-11-12 00:50:04,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-12 00:50:04,160 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:04,160 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:50:04,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:50:04,160 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:50:04,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:04,161 INFO L85 PathProgramCache]: Analyzing trace with hash -57424588, now seen corresponding path program 1 times [2023-11-12 00:50:04,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:04,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7017491] [2023-11-12 00:50:04,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:04,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:05,403 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2023-11-12 00:50:05,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:05,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7017491] [2023-11-12 00:50:05,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7017491] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:50:05,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136386886] [2023-11-12 00:50:05,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:05,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:05,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4966180a-cda3-4e7e-ad47-12115721bc34/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:50:05,415 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4966180a-cda3-4e7e-ad47-12115721bc34/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:50:05,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4966180a-cda3-4e7e-ad47-12115721bc34/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:50:06,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:06,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 2845 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 00:50:06,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:50:06,350 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2023-11-12 00:50:06,350 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:50:06,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136386886] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:06,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:50:06,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-12 00:50:06,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738882499] [2023-11-12 00:50:06,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:06,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:50:06,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:06,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:50:06,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:50:06,353 INFO L87 Difference]: Start difference. First operand 1122 states and 1622 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-12 00:50:06,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:06,830 INFO L93 Difference]: Finished difference Result 2344 states and 3361 transitions. [2023-11-12 00:50:06,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 00:50:06,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 128 [2023-11-12 00:50:06,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:06,840 INFO L225 Difference]: With dead ends: 2344 [2023-11-12 00:50:06,840 INFO L226 Difference]: Without dead ends: 1242 [2023-11-12 00:50:06,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:50:06,845 INFO L413 NwaCegarLoop]: 748 mSDtfsCounter, 417 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 1884 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:06,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 1884 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:50:06,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2023-11-12 00:50:06,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1148. [2023-11-12 00:50:06,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 809 states have (on average 1.435105067985167) internal successors, (1161), 817 states have internal predecessors, (1161), 243 states have call successors, (243), 95 states have call predecessors, (243), 95 states have return successors, (243), 237 states have call predecessors, (243), 243 states have call successors, (243) [2023-11-12 00:50:06,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 1647 transitions. [2023-11-12 00:50:06,929 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 1647 transitions. Word has length 128 [2023-11-12 00:50:06,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:06,931 INFO L495 AbstractCegarLoop]: Abstraction has 1148 states and 1647 transitions. [2023-11-12 00:50:06,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-12 00:50:06,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 1647 transitions. [2023-11-12 00:50:06,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-12 00:50:06,940 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:06,940 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:50:06,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4966180a-cda3-4e7e-ad47-12115721bc34/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:50:07,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4966180a-cda3-4e7e-ad47-12115721bc34/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:07,152 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:50:07,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:07,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1541685355, now seen corresponding path program 1 times [2023-11-12 00:50:07,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:07,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855572581] [2023-11-12 00:50:07,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:07,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:07,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:08,094 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2023-11-12 00:50:08,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:08,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855572581] [2023-11-12 00:50:08,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855572581] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:50:08,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881375371] [2023-11-12 00:50:08,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:08,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:08,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4966180a-cda3-4e7e-ad47-12115721bc34/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:50:08,097 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4966180a-cda3-4e7e-ad47-12115721bc34/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:50:08,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4966180a-cda3-4e7e-ad47-12115721bc34/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:50:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:08,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 2967 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 00:50:08,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:50:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-11-12 00:50:09,014 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:50:09,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881375371] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:09,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:50:09,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-12 00:50:09,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767859875] [2023-11-12 00:50:09,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:09,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:50:09,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:09,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:50:09,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:50:09,018 INFO L87 Difference]: Start difference. First operand 1148 states and 1647 transitions. Second operand has 4 states, 3 states have (on average 19.666666666666668) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-12 00:50:09,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:09,382 INFO L93 Difference]: Finished difference Result 2280 states and 3278 transitions. [2023-11-12 00:50:09,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:50:09,383 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 19.666666666666668) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 141 [2023-11-12 00:50:09,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:09,391 INFO L225 Difference]: With dead ends: 2280 [2023-11-12 00:50:09,391 INFO L226 Difference]: Without dead ends: 1149 [2023-11-12 00:50:09,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:50:09,395 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 0 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1174 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:09,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1174 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 00:50:09,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2023-11-12 00:50:09,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1149. [2023-11-12 00:50:09,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 810 states have (on average 1.434567901234568) internal successors, (1162), 818 states have internal predecessors, (1162), 243 states have call successors, (243), 95 states have call predecessors, (243), 95 states have return successors, (243), 237 states have call predecessors, (243), 243 states have call successors, (243) [2023-11-12 00:50:09,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1648 transitions. [2023-11-12 00:50:09,469 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1648 transitions. Word has length 141 [2023-11-12 00:50:09,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:09,471 INFO L495 AbstractCegarLoop]: Abstraction has 1149 states and 1648 transitions. [2023-11-12 00:50:09,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 19.666666666666668) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-12 00:50:09,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1648 transitions. [2023-11-12 00:50:09,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-12 00:50:09,475 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:09,475 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:50:09,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4966180a-cda3-4e7e-ad47-12115721bc34/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:50:09,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4966180a-cda3-4e7e-ad47-12115721bc34/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:09,690 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:50:09,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:09,691 INFO L85 PathProgramCache]: Analyzing trace with hash -621917820, now seen corresponding path program 1 times [2023-11-12 00:50:09,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:09,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351402507] [2023-11-12 00:50:09,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:09,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2023-11-12 00:50:10,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:10,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351402507] [2023-11-12 00:50:10,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351402507] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:50:10,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626013160] [2023-11-12 00:50:10,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:10,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:10,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4966180a-cda3-4e7e-ad47-12115721bc34/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:50:10,991 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4966180a-cda3-4e7e-ad47-12115721bc34/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:50:11,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4966180a-cda3-4e7e-ad47-12115721bc34/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:50:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:11,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 3012 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 00:50:11,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:50:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 132 proven. 1 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2023-11-12 00:50:12,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 00:50:12,197 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2023-11-12 00:50:12,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626013160] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 00:50:12,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1104269119] [2023-11-12 00:50:12,232 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2023-11-12 00:50:12,233 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 00:50:12,237 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 00:50:12,242 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 00:50:12,243 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs