./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 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/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_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire --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-30e01a7 [2023-11-23 21:28:34,454 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:28:34,616 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:28:34,627 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:28:34,629 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:28:34,671 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:28:34,672 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:28:34,673 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:28:34,674 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:28:34,680 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:28:34,681 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:28:34,682 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:28:34,683 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:28:34,685 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:28:34,685 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:28:34,686 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:28:34,686 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:28:34,687 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:28:34,687 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:28:34,688 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:28:34,689 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:28:34,689 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:28:34,691 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:28:34,691 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:28:34,692 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:28:34,692 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:28:34,693 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:28:34,694 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:28:34,694 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:28:34,695 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:28:34,696 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:28:34,697 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:28:34,697 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:28:34,697 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:28:34,698 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:28:34,698 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:28:34,699 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:28:34,699 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:28:34,699 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:28:34,699 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:28:34,700 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:28:34,701 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:28:34,701 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:28:34,701 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:28:34,702 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_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 75d232d8f5b5300b961fad2246cc6bf62d9846d1616b34b46b949e6c32c2a93b [2023-11-23 21:28:35,024 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:28:35,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:28:35,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:28:35,063 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:28:35,063 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:28:35,064 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/../../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 [2023-11-23 21:28:38,139 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:28:38,671 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:28:38,671 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/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 [2023-11-23 21:28:38,719 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/data/74d14f59f/beec2913c73146208e942af64676271c/FLAGfb0d3d4c2 [2023-11-23 21:28:38,739 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/data/74d14f59f/beec2913c73146208e942af64676271c [2023-11-23 21:28:38,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:28:38,748 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:28:38,752 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:28:38,752 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:28:38,758 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:28:38,759 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:28:38" (1/1) ... [2023-11-23 21:28:38,761 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d6e60b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:38, skipping insertion in model container [2023-11-23 21:28:38,761 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:28:38" (1/1) ... [2023-11-23 21:28:38,850 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:28:39,891 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_89954e7b-032f-4d40-b00e-f882dbb3c789/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] [2023-11-23 21:28:39,969 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:28:40,052 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:28:40,259 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_89954e7b-032f-4d40-b00e-f882dbb3c789/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] [2023-11-23 21:28:40,265 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:28:40,326 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:28:40,327 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:40 WrapperNode [2023-11-23 21:28:40,328 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:28:40,329 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:28:40,329 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:28:40,330 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:28:40,339 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:40" (1/1) ... [2023-11-23 21:28:40,405 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:40" (1/1) ... [2023-11-23 21:28:40,528 INFO L138 Inliner]: procedures = 94, calls = 1038, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 1852 [2023-11-23 21:28:40,529 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:28:40,530 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:28:40,530 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:28:40,531 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:28:40,542 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:40" (1/1) ... [2023-11-23 21:28:40,543 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:40" (1/1) ... [2023-11-23 21:28:40,561 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:40" (1/1) ... [2023-11-23 21:28:40,562 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:40" (1/1) ... [2023-11-23 21:28:40,721 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:40" (1/1) ... [2023-11-23 21:28:40,750 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:40" (1/1) ... [2023-11-23 21:28:40,778 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:40" (1/1) ... [2023-11-23 21:28:40,802 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:40" (1/1) ... [2023-11-23 21:28:40,825 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:28:40,828 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:28:40,829 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:28:40,829 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:28:40,831 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:40" (1/1) ... [2023-11-23 21:28:40,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:28:40,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:40,873 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:28:40,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:28:40,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:28:40,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:28:40,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:28:40,925 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_serial_data [2023-11-23 21:28:40,925 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_serial_data [2023-11-23 21:28:40,925 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_open [2023-11-23 21:28:40,925 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_open [2023-11-23 21:28:40,925 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 21:28:40,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 21:28:40,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:28:40,926 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-23 21:28:40,926 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-23 21:28:40,927 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_negative [2023-11-23 21:28:40,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_negative [2023-11-23 21:28:40,927 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_interface [2023-11-23 21:28:40,927 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_interface [2023-11-23 21:28:40,927 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2023-11-23 21:28:40,928 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2023-11-23 21:28:40,928 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:28:40,928 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2023-11-23 21:28:40,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2023-11-23 21:28:40,928 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_resume [2023-11-23 21:28:40,929 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_resume [2023-11-23 21:28:40,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:28:40,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:28:40,929 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-23 21:28:40,929 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-23 21:28:40,930 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-23 21:28:40,930 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-23 21:28:40,930 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_disconnect [2023-11-23 21:28:40,930 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_disconnect [2023-11-23 21:28:40,930 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-23 21:28:40,931 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-23 21:28:40,931 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister [2023-11-23 21:28:40,931 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister [2023-11-23 21:28:40,931 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_disconnect [2023-11-23 21:28:40,931 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_disconnect [2023-11-23 21:28:40,932 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_write [2023-11-23 21:28:40,932 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_write [2023-11-23 21:28:40,932 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_write_room [2023-11-23 21:28:40,932 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_write_room [2023-11-23 21:28:40,932 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_suspend [2023-11-23 21:28:40,933 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_suspend [2023-11-23 21:28:40,933 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-23 21:28:40,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-23 21:28:40,933 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:28:40,933 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:28:40,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:28:40,934 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_close [2023-11-23 21:28:40,934 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_close [2023-11-23 21:28:40,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:28:40,934 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_chars_in_buffer [2023-11-23 21:28:40,934 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_chars_in_buffer [2023-11-23 21:28:40,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:28:40,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:28:40,935 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-11-23 21:28:40,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-11-23 21:28:41,347 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:28:41,350 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:28:41,424 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 21:28:43,462 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:28:43,940 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:28:43,941 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:28:43,944 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:28:43 BoogieIcfgContainer [2023-11-23 21:28:43,944 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:28:43,948 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:28:43,948 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:28:43,951 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:28:43,951 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:28:38" (1/3) ... [2023-11-23 21:28:43,952 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6429a53e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:28:43, skipping insertion in model container [2023-11-23 21:28:43,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:40" (2/3) ... [2023-11-23 21:28:43,954 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6429a53e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:28:43, skipping insertion in model container [2023-11-23 21:28:43,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:28:43" (3/3) ... [2023-11-23 21:28:43,956 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 [2023-11-23 21:28:43,976 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:28:43,977 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:28:44,065 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:28:44,075 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;@41657f9d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:28:44,076 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:28:44,085 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) [2023-11-23 21:28:44,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-23 21:28:44,106 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:44,107 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] [2023-11-23 21:28:44,108 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:44,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:44,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1253267545, now seen corresponding path program 1 times [2023-11-23 21:28:44,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:44,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467333673] [2023-11-23 21:28:44,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:44,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:44,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:45,338 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-23 21:28:45,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:45,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467333673] [2023-11-23 21:28:45,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467333673] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:45,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:45,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:45,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61402289] [2023-11-23 21:28:45,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:45,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:45,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:45,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:45,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:45,411 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) [2023-11-23 21:28:45,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:45,960 INFO L93 Difference]: Finished difference Result 896 states and 1315 transitions. [2023-11-23 21:28:45,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:45,963 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 [2023-11-23 21:28:45,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:45,994 INFO L225 Difference]: With dead ends: 896 [2023-11-23 21:28:45,995 INFO L226 Difference]: Without dead ends: 581 [2023-11-23 21:28:46,007 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 [2023-11-23 21:28:46,017 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 414 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2023-11-23 21:28:46,020 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] [2023-11-23 21:28:46,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2023-11-23 21:28:46,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 581. [2023-11-23 21:28:46,179 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) [2023-11-23 21:28:46,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 845 transitions. [2023-11-23 21:28:46,190 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 845 transitions. Word has length 65 [2023-11-23 21:28:46,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:46,191 INFO L495 AbstractCegarLoop]: Abstraction has 581 states and 845 transitions. [2023-11-23 21:28:46,192 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) [2023-11-23 21:28:46,192 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 845 transitions. [2023-11-23 21:28:46,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-23 21:28:46,203 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:46,203 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] [2023-11-23 21:28:46,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:28:46,204 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:46,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:46,204 INFO L85 PathProgramCache]: Analyzing trace with hash -339764104, now seen corresponding path program 1 times [2023-11-23 21:28:46,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:46,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408431667] [2023-11-23 21:28:46,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:46,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:46,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:46,750 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-23 21:28:46,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:46,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408431667] [2023-11-23 21:28:46,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408431667] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:46,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:46,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:46,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105752998] [2023-11-23 21:28:46,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:46,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:46,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:46,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:46,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:46,756 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) [2023-11-23 21:28:47,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:47,093 INFO L93 Difference]: Finished difference Result 966 states and 1402 transitions. [2023-11-23 21:28:47,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:47,094 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 [2023-11-23 21:28:47,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:47,111 INFO L225 Difference]: With dead ends: 966 [2023-11-23 21:28:47,113 INFO L226 Difference]: Without dead ends: 958 [2023-11-23 21:28:47,114 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 [2023-11-23 21:28:47,121 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, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:47,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 782 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:28:47,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2023-11-23 21:28:47,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 950. [2023-11-23 21:28:47,204 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) [2023-11-23 21:28:47,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1383 transitions. [2023-11-23 21:28:47,212 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1383 transitions. Word has length 65 [2023-11-23 21:28:47,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:47,214 INFO L495 AbstractCegarLoop]: Abstraction has 950 states and 1383 transitions. [2023-11-23 21:28:47,214 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) [2023-11-23 21:28:47,215 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1383 transitions. [2023-11-23 21:28:47,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-23 21:28:47,219 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:47,220 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] [2023-11-23 21:28:47,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:28:47,221 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:47,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:47,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1263781214, now seen corresponding path program 1 times [2023-11-23 21:28:47,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:47,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670463562] [2023-11-23 21:28:47,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:47,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:47,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-11-23 21:28:47,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:47,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670463562] [2023-11-23 21:28:47,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670463562] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:47,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:47,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:47,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713253484] [2023-11-23 21:28:47,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:47,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:47,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:47,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:47,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:47,674 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) [2023-11-23 21:28:48,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:48,047 INFO L93 Difference]: Finished difference Result 2064 states and 2994 transitions. [2023-11-23 21:28:48,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:48,048 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 [2023-11-23 21:28:48,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:48,059 INFO L225 Difference]: With dead ends: 2064 [2023-11-23 21:28:48,059 INFO L226 Difference]: Without dead ends: 1130 [2023-11-23 21:28:48,062 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 [2023-11-23 21:28:48,063 INFO L413 NwaCegarLoop]: 403 mSDtfsCounter, 95 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2023-11-23 21:28:48,064 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] [2023-11-23 21:28:48,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2023-11-23 21:28:48,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 1122. [2023-11-23 21:28:48,140 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) [2023-11-23 21:28:48,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1622 transitions. [2023-11-23 21:28:48,148 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1622 transitions. Word has length 81 [2023-11-23 21:28:48,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:48,149 INFO L495 AbstractCegarLoop]: Abstraction has 1122 states and 1622 transitions. [2023-11-23 21:28:48,150 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) [2023-11-23 21:28:48,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1622 transitions. [2023-11-23 21:28:48,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-23 21:28:48,155 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:48,155 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] [2023-11-23 21:28:48,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:28:48,156 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:48,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:48,157 INFO L85 PathProgramCache]: Analyzing trace with hash -441791236, now seen corresponding path program 1 times [2023-11-23 21:28:48,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:48,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654131757] [2023-11-23 21:28:48,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:48,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:48,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:49,985 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2023-11-23 21:28:49,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:49,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654131757] [2023-11-23 21:28:49,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654131757] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:49,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:49,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:28:49,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497902939] [2023-11-23 21:28:49,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:49,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:28:49,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:49,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:28:49,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:28:49,998 INFO L87 Difference]: Start difference. First operand 1122 states and 1622 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-23 21:28:51,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:51,003 INFO L93 Difference]: Finished difference Result 1762 states and 2559 transitions. [2023-11-23 21:28:51,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:28:51,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 128 [2023-11-23 21:28:51,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:51,020 INFO L225 Difference]: With dead ends: 1762 [2023-11-23 21:28:51,020 INFO L226 Difference]: Without dead ends: 1754 [2023-11-23 21:28:51,022 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 [2023-11-23 21:28:51,024 INFO L413 NwaCegarLoop]: 573 mSDtfsCounter, 521 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:51,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [584 Valid, 1216 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 21:28:51,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2023-11-23 21:28:51,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1718. [2023-11-23 21:28:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1223 states have (on average 1.4488961569910057) internal successors, (1772), 1241 states have internal predecessors, (1772), 362 states have call successors, (362), 132 states have call predecessors, (362), 132 states have return successors, (362), 348 states have call predecessors, (362), 362 states have call successors, (362) [2023-11-23 21:28:51,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 2496 transitions. [2023-11-23 21:28:51,166 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 2496 transitions. Word has length 128 [2023-11-23 21:28:51,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:51,169 INFO L495 AbstractCegarLoop]: Abstraction has 1718 states and 2496 transitions. [2023-11-23 21:28:51,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 2 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-23 21:28:51,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 2496 transitions. [2023-11-23 21:28:51,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-23 21:28:51,181 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:51,181 INFO L195 NwaCegarLoop]: trace histogram [7, 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, 1, 1, 1] [2023-11-23 21:28:51,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:28:51,182 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:51,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:51,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1792559895, now seen corresponding path program 1 times [2023-11-23 21:28:51,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:51,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665144340] [2023-11-23 21:28:51,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:51,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-11-23 21:28:52,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:52,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665144340] [2023-11-23 21:28:52,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665144340] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:28:52,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506130848] [2023-11-23 21:28:52,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:52,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:52,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:52,122 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:28:52,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:28:52,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:52,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 2864 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-23 21:28:52,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2023-11-23 21:28:53,073 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:28:53,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506130848] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:53,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:28:53,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2023-11-23 21:28:53,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657996175] [2023-11-23 21:28:53,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:53,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:28:53,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:53,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:28:53,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:28:53,078 INFO L87 Difference]: Start difference. First operand 1718 states and 2496 transitions. Second operand has 7 states, 5 states have (on average 11.2) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-23 21:28:53,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:53,931 INFO L93 Difference]: Finished difference Result 2892 states and 4294 transitions. [2023-11-23 21:28:53,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:28:53,932 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 11.2) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 132 [2023-11-23 21:28:53,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:53,952 INFO L225 Difference]: With dead ends: 2892 [2023-11-23 21:28:53,952 INFO L226 Difference]: Without dead ends: 2246 [2023-11-23 21:28:53,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:28:53,956 INFO L413 NwaCegarLoop]: 748 mSDtfsCounter, 331 mSDsluCounter, 3355 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 4103 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:53,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 4103 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:28:53,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2023-11-23 21:28:54,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 1722. [2023-11-23 21:28:54,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1722 states, 1227 states have (on average 1.4474327628361858) internal successors, (1776), 1245 states have internal predecessors, (1776), 362 states have call successors, (362), 132 states have call predecessors, (362), 132 states have return successors, (362), 348 states have call predecessors, (362), 362 states have call successors, (362) [2023-11-23 21:28:54,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 2500 transitions. [2023-11-23 21:28:54,105 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 2500 transitions. Word has length 132 [2023-11-23 21:28:54,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:54,107 INFO L495 AbstractCegarLoop]: Abstraction has 1722 states and 2500 transitions. [2023-11-23 21:28:54,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 11.2) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2023-11-23 21:28:54,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 2500 transitions. [2023-11-23 21:28:54,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-23 21:28:54,113 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:54,114 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:54,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:28:54,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:54,329 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:54,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:54,329 INFO L85 PathProgramCache]: Analyzing trace with hash 409400035, now seen corresponding path program 1 times [2023-11-23 21:28:54,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:54,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995632460] [2023-11-23 21:28:54,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:54,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:54,731 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2023-11-23 21:28:54,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:54,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995632460] [2023-11-23 21:28:54,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995632460] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:54,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:54,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:54,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724033247] [2023-11-23 21:28:54,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:54,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:54,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:54,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:54,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:54,735 INFO L87 Difference]: Start difference. First operand 1722 states and 2500 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-23 21:28:55,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:55,239 INFO L93 Difference]: Finished difference Result 3620 states and 5322 transitions. [2023-11-23 21:28:55,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:55,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 137 [2023-11-23 21:28:55,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:55,255 INFO L225 Difference]: With dead ends: 3620 [2023-11-23 21:28:55,255 INFO L226 Difference]: Without dead ends: 1924 [2023-11-23 21:28:55,262 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 [2023-11-23 21:28:55,263 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 285 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:55,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 592 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:28:55,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1924 states. [2023-11-23 21:28:55,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1898. [2023-11-23 21:28:55,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1898 states, 1436 states have (on average 1.4038997214484679) internal successors, (2016), 1450 states have internal predecessors, (2016), 318 states have call successors, (318), 143 states have call predecessors, (318), 143 states have return successors, (318), 308 states have call predecessors, (318), 318 states have call successors, (318) [2023-11-23 21:28:55,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1898 states to 1898 states and 2652 transitions. [2023-11-23 21:28:55,441 INFO L78 Accepts]: Start accepts. Automaton has 1898 states and 2652 transitions. Word has length 137 [2023-11-23 21:28:55,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:55,441 INFO L495 AbstractCegarLoop]: Abstraction has 1898 states and 2652 transitions. [2023-11-23 21:28:55,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-11-23 21:28:55,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1898 states and 2652 transitions. [2023-11-23 21:28:55,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-23 21:28:55,448 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:55,448 INFO L195 NwaCegarLoop]: trace histogram [7, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:55,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:28:55,448 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:55,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:55,449 INFO L85 PathProgramCache]: Analyzing trace with hash 715460009, now seen corresponding path program 1 times [2023-11-23 21:28:55,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:55,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585955472] [2023-11-23 21:28:55,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:55,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:56,572 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2023-11-23 21:28:56,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:56,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585955472] [2023-11-23 21:28:56,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585955472] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:28:56,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121060972] [2023-11-23 21:28:56,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:56,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:56,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:56,575 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:28:56,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:28:57,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:57,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 2885 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:28:57,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:57,445 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-11-23 21:28:57,447 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:28:57,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121060972] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:57,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:28:57,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-23 21:28:57,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585688011] [2023-11-23 21:28:57,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:57,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:28:57,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:57,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:28:57,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:28:57,451 INFO L87 Difference]: Start difference. First operand 1898 states and 2652 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-23 21:28:57,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:57,998 INFO L93 Difference]: Finished difference Result 3984 states and 5518 transitions. [2023-11-23 21:28:57,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:28:57,999 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 137 [2023-11-23 21:28:57,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:58,014 INFO L225 Difference]: With dead ends: 3984 [2023-11-23 21:28:58,014 INFO L226 Difference]: Without dead ends: 2097 [2023-11-23 21:28:58,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:28:58,020 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 [2023-11-23 21:28:58,021 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] [2023-11-23 21:28:58,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2023-11-23 21:28:58,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1936. [2023-11-23 21:28:58,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1936 states, 1456 states have (on average 1.3956043956043955) internal successors, (2032), 1473 states have internal predecessors, (2032), 327 states have call successors, (327), 152 states have call predecessors, (327), 152 states have return successors, (327), 314 states have call predecessors, (327), 327 states have call successors, (327) [2023-11-23 21:28:58,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 2686 transitions. [2023-11-23 21:28:58,176 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 2686 transitions. Word has length 137 [2023-11-23 21:28:58,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:58,176 INFO L495 AbstractCegarLoop]: Abstraction has 1936 states and 2686 transitions. [2023-11-23 21:28:58,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-23 21:28:58,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 2686 transitions. [2023-11-23 21:28:58,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-11-23 21:28:58,182 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:58,182 INFO L195 NwaCegarLoop]: trace histogram [8, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:58,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:28:58,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:58,396 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:58,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:58,397 INFO L85 PathProgramCache]: Analyzing trace with hash 429707916, now seen corresponding path program 1 times [2023-11-23 21:28:58,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:58,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533479059] [2023-11-23 21:28:58,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:58,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2023-11-23 21:28:59,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:59,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533479059] [2023-11-23 21:28:59,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533479059] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:28:59,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287074196] [2023-11-23 21:28:59,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:59,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:59,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:59,256 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:28:59,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:29:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:00,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 3007 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 21:29:00,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:29:00,206 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-11-23 21:29:00,206 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:29:00,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287074196] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:00,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:29:00,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-23 21:29:00,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129779709] [2023-11-23 21:29:00,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:00,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:29:00,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:00,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:29:00,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:29:00,210 INFO L87 Difference]: Start difference. First operand 1936 states and 2686 transitions. Second operand has 4 states, 3 states have (on average 21.666666666666668) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-23 21:29:00,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:00,631 INFO L93 Difference]: Finished difference Result 3856 states and 5356 transitions. [2023-11-23 21:29:00,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:29:00,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 21.666666666666668) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 150 [2023-11-23 21:29:00,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:00,648 INFO L225 Difference]: With dead ends: 3856 [2023-11-23 21:29:00,649 INFO L226 Difference]: Without dead ends: 1937 [2023-11-23 21:29:00,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:29:00,655 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 0 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2023-11-23 21:29:00,655 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] [2023-11-23 21:29:00,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2023-11-23 21:29:00,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1937. [2023-11-23 21:29:00,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1457 states have (on average 1.3953328757721346) internal successors, (2033), 1474 states have internal predecessors, (2033), 327 states have call successors, (327), 152 states have call predecessors, (327), 152 states have return successors, (327), 314 states have call predecessors, (327), 327 states have call successors, (327) [2023-11-23 21:29:00,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 2687 transitions. [2023-11-23 21:29:00,799 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 2687 transitions. Word has length 150 [2023-11-23 21:29:00,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:00,799 INFO L495 AbstractCegarLoop]: Abstraction has 1937 states and 2687 transitions. [2023-11-23 21:29:00,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 21.666666666666668) internal successors, (65), 4 states have internal predecessors, (65), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-23 21:29:00,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 2687 transitions. [2023-11-23 21:29:00,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-11-23 21:29:00,805 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:00,806 INFO L195 NwaCegarLoop]: trace histogram [8, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:00,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:29:01,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:01,033 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:01,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:01,035 INFO L85 PathProgramCache]: Analyzing trace with hash -2010843569, now seen corresponding path program 1 times [2023-11-23 21:29:01,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:01,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897243033] [2023-11-23 21:29:01,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:01,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:01,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:02,288 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-11-23 21:29:02,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:02,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897243033] [2023-11-23 21:29:02,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897243033] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:29:02,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930856444] [2023-11-23 21:29:02,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:02,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:02,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:29:02,293 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:29:02,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89954e7b-032f-4d40-b00e-f882dbb3c789/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:29:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:03,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 3052 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-23 21:29:03,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:29:03,293 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 138 proven. 1 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-11-23 21:29:03,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:29:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-11-23 21:29:03,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930856444] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:29:03,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1917794486] [2023-11-23 21:29:03,523 INFO L159 IcfgInterpreter]: Started Sifa with 76 locations of interest [2023-11-23 21:29:03,523 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:29:03,527 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:29:03,532 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:29:03,533 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs