./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pcd.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/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_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pcd.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/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_1368a87e-7426-40aa-96e9-876686d40ae3/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 f37aa3f5f53d7516c3aab2329ab9f19add00a9b7f37383228b3b0ae48d55a761 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:33:09,751 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:33:09,846 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 20:33:09,852 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:33:09,853 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:33:09,887 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:33:09,888 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:33:09,889 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:33:09,890 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:33:09,891 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:33:09,892 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:33:09,893 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:33:09,893 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:33:09,894 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:33:09,895 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:33:09,896 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:33:09,897 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:33:09,897 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:33:09,898 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:33:09,899 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:33:09,900 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:33:09,900 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:33:09,901 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:33:09,902 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:33:09,902 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:33:09,903 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:33:09,904 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:33:09,904 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:33:09,905 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:33:09,905 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:33:09,906 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:33:09,906 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:33:09,907 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:33:09,907 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:33:09,907 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:33:09,908 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:33:09,908 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:33:09,908 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:33:09,909 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:33:09,909 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:33:09,909 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:33:09,910 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:33:09,910 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:33:09,910 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:33:09,911 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_1368a87e-7426-40aa-96e9-876686d40ae3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f37aa3f5f53d7516c3aab2329ab9f19add00a9b7f37383228b3b0ae48d55a761 [2023-11-23 20:33:10,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:33:10,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:33:10,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:33:10,325 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:33:10,326 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:33:10,327 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pcd.ko-main.cil.out.i [2023-11-23 20:33:13,572 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:33:14,196 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:33:14,197 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pcd.ko-main.cil.out.i [2023-11-23 20:33:14,225 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/data/d5f0bfe70/3431cadfa66d48bd80e560680f4a2597/FLAGf12bd30cd [2023-11-23 20:33:14,240 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/data/d5f0bfe70/3431cadfa66d48bd80e560680f4a2597 [2023-11-23 20:33:14,245 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:33:14,246 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:33:14,247 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:33:14,248 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:33:14,253 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:33:14,254 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:14" (1/1) ... [2023-11-23 20:33:14,255 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e419f85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:14, skipping insertion in model container [2023-11-23 20:33:14,255 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:14" (1/1) ... [2023-11-23 20:33:14,398 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:33:15,672 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_1368a87e-7426-40aa-96e9-876686d40ae3/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pcd.ko-main.cil.out.i[148417,148430] [2023-11-23 20:33:15,800 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:33:15,881 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:33:16,248 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_1368a87e-7426-40aa-96e9-876686d40ae3/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pcd.ko-main.cil.out.i[148417,148430] [2023-11-23 20:33:16,298 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:33:16,390 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:33:16,390 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:16 WrapperNode [2023-11-23 20:33:16,390 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:33:16,416 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:33:16,416 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:33:16,416 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:33:16,430 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:16" (1/1) ... [2023-11-23 20:33:16,513 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:16" (1/1) ... [2023-11-23 20:33:16,649 INFO L138 Inliner]: procedures = 167, calls = 938, calls flagged for inlining = 60, calls inlined = 52, statements flattened = 2063 [2023-11-23 20:33:16,650 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:33:16,651 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:33:16,651 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:33:16,651 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:33:16,661 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:16" (1/1) ... [2023-11-23 20:33:16,661 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:16" (1/1) ... [2023-11-23 20:33:16,685 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:16" (1/1) ... [2023-11-23 20:33:16,692 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:16" (1/1) ... [2023-11-23 20:33:16,783 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:16" (1/1) ... [2023-11-23 20:33:16,797 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:16" (1/1) ... [2023-11-23 20:33:16,811 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:16" (1/1) ... [2023-11-23 20:33:16,824 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:16" (1/1) ... [2023-11-23 20:33:16,856 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:33:16,857 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:33:16,857 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:33:16,857 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:33:16,858 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:16" (1/1) ... [2023-11-23 20:33:16,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:33:16,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:16,891 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:33:16,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:33:16,933 INFO L130 BoogieDeclarations]: Found specification of procedure do_pcd_request [2023-11-23 20:33:16,933 INFO L138 BoogieDeclarations]: Found implementation of procedure do_pcd_request [2023-11-23 20:33:16,933 INFO L130 BoogieDeclarations]: Found specification of procedure pi_release [2023-11-23 20:33:16,933 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_release [2023-11-23 20:33:16,934 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2023-11-23 20:33:16,934 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2023-11-23 20:33:16,934 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_audio_ioctl [2023-11-23 20:33:16,936 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_audio_ioctl [2023-11-23 20:33:16,936 INFO L130 BoogieDeclarations]: Found specification of procedure pi_disconnect [2023-11-23 20:33:16,936 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_disconnect [2023-11-23 20:33:16,937 INFO L130 BoogieDeclarations]: Found specification of procedure status_reg [2023-11-23 20:33:16,937 INFO L138 BoogieDeclarations]: Found implementation of procedure status_reg [2023-11-23 20:33:16,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 20:33:16,937 INFO L130 BoogieDeclarations]: Found specification of procedure ps_set_intr [2023-11-23 20:33:16,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ps_set_intr [2023-11-23 20:33:16,937 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_packet [2023-11-23 20:33:16,938 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_packet [2023-11-23 20:33:16,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-23 20:33:16,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-23 20:33:16,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:33:16,939 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_drive_status [2023-11-23 20:33:16,939 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_drive_status [2023-11-23 20:33:16,940 INFO L130 BoogieDeclarations]: Found specification of procedure read_reg [2023-11-23 20:33:16,940 INFO L138 BoogieDeclarations]: Found implementation of procedure read_reg [2023-11-23 20:33:16,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-23 20:33:16,941 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-23 20:33:16,941 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 20:33:16,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 20:33:16,941 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_blkdev [2023-11-23 20:33:16,942 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_blkdev [2023-11-23 20:33:16,942 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_tray_move [2023-11-23 20:33:16,943 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_tray_move [2023-11-23 20:33:16,943 INFO L130 BoogieDeclarations]: Found specification of procedure do_pcd_read [2023-11-23 20:33:16,943 INFO L138 BoogieDeclarations]: Found implementation of procedure do_pcd_read [2023-11-23 20:33:16,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:33:16,944 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-23 20:33:16,944 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-23 20:33:16,944 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_check_events [2023-11-23 20:33:16,944 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_check_events [2023-11-23 20:33:16,944 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 20:33:16,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 20:33:16,945 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_lock_door [2023-11-23 20:33:16,945 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_lock_door [2023-11-23 20:33:16,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:33:16,945 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~TO~VOID [2023-11-23 20:33:16,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~TO~VOID [2023-11-23 20:33:16,946 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-11-23 20:33:16,946 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-11-23 20:33:16,946 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_block_check_events [2023-11-23 20:33:16,946 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_block_check_events [2023-11-23 20:33:16,946 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-23 20:33:16,946 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-23 20:33:16,947 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_sleep [2023-11-23 20:33:16,947 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_sleep [2023-11-23 20:33:16,947 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_wait [2023-11-23 20:33:16,947 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_wait [2023-11-23 20:33:16,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:33:16,947 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_atapi [2023-11-23 20:33:16,948 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_atapi [2023-11-23 20:33:16,948 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_pcd_mutex [2023-11-23 20:33:16,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_pcd_mutex [2023-11-23 20:33:16,949 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_get_mcn [2023-11-23 20:33:16,949 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_get_mcn [2023-11-23 20:33:16,950 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2023-11-23 20:33:16,950 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2023-11-23 20:33:16,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:33:16,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 20:33:16,951 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_identify [2023-11-23 20:33:16,951 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_identify [2023-11-23 20:33:16,951 INFO L130 BoogieDeclarations]: Found specification of procedure next_request [2023-11-23 20:33:16,951 INFO L138 BoogieDeclarations]: Found implementation of procedure next_request [2023-11-23 20:33:16,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 20:33:16,952 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-23 20:33:16,952 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-23 20:33:16,952 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_probe [2023-11-23 20:33:16,952 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_probe [2023-11-23 20:33:16,952 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_command [2023-11-23 20:33:16,953 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_command [2023-11-23 20:33:16,953 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_completion [2023-11-23 20:33:16,953 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_completion [2023-11-23 20:33:16,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:33:16,953 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_drive_reset [2023-11-23 20:33:16,954 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_drive_reset [2023-11-23 20:33:16,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 20:33:16,954 INFO L130 BoogieDeclarations]: Found specification of procedure pi_init [2023-11-23 20:33:16,954 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_init [2023-11-23 20:33:16,955 INFO L130 BoogieDeclarations]: Found specification of procedure pi_read_regr [2023-11-23 20:33:16,955 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_read_regr [2023-11-23 20:33:16,956 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-23 20:33:16,956 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-23 20:33:16,956 INFO L130 BoogieDeclarations]: Found specification of procedure pi_connect [2023-11-23 20:33:16,956 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_connect [2023-11-23 20:33:16,956 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_pcd_mutex [2023-11-23 20:33:16,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_pcd_mutex [2023-11-23 20:33:16,957 INFO L130 BoogieDeclarations]: Found specification of procedure put_disk [2023-11-23 20:33:16,957 INFO L138 BoogieDeclarations]: Found implementation of procedure put_disk [2023-11-23 20:33:16,957 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2023-11-23 20:33:16,957 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2023-11-23 20:33:16,957 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_delayed_work [2023-11-23 20:33:16,957 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_delayed_work [2023-11-23 20:33:16,958 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_reset [2023-11-23 20:33:16,958 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_reset [2023-11-23 20:33:16,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:33:16,958 INFO L130 BoogieDeclarations]: Found specification of procedure pcd_block_ioctl [2023-11-23 20:33:16,958 INFO L138 BoogieDeclarations]: Found implementation of procedure pcd_block_ioctl [2023-11-23 20:33:16,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-23 20:33:16,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:33:16,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:33:16,959 INFO L130 BoogieDeclarations]: Found specification of procedure pi_do_claimed [2023-11-23 20:33:16,959 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_do_claimed [2023-11-23 20:33:17,384 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:33:17,388 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:33:23,592 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:33:24,495 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:33:24,496 INFO L309 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-23 20:33:24,498 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:24 BoogieIcfgContainer [2023-11-23 20:33:24,498 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:33:24,500 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:33:24,500 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:33:24,504 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:33:24,504 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:33:14" (1/3) ... [2023-11-23 20:33:24,505 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e418e6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:24, skipping insertion in model container [2023-11-23 20:33:24,505 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:16" (2/3) ... [2023-11-23 20:33:24,506 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e418e6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:24, skipping insertion in model container [2023-11-23 20:33:24,506 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:24" (3/3) ... [2023-11-23 20:33:24,510 INFO L112 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pcd.ko-main.cil.out.i [2023-11-23 20:33:24,533 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:33:24,533 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:33:24,625 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:33:24,634 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;@64178343, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:33:24,634 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:33:24,645 INFO L276 IsEmpty]: Start isEmpty. Operand has 609 states, 390 states have (on average 1.4) internal successors, (546), 414 states have internal predecessors, (546), 175 states have call successors, (175), 47 states have call predecessors, (175), 47 states have return successors, (175), 170 states have call predecessors, (175), 175 states have call successors, (175) [2023-11-23 20:33:24,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-23 20:33:24,666 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:24,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:24,668 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:24,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:24,677 INFO L85 PathProgramCache]: Analyzing trace with hash -348399817, now seen corresponding path program 1 times [2023-11-23 20:33:24,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:24,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791255142] [2023-11-23 20:33:24,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:24,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:25,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:25,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:25,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791255142] [2023-11-23 20:33:25,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791255142] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:25,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:25,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:33:25,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617703226] [2023-11-23 20:33:25,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:25,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:33:25,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:25,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:33:25,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:33:25,326 INFO L87 Difference]: Start difference. First operand has 609 states, 390 states have (on average 1.4) internal successors, (546), 414 states have internal predecessors, (546), 175 states have call successors, (175), 47 states have call predecessors, (175), 47 states have return successors, (175), 170 states have call predecessors, (175), 175 states have call successors, (175) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:33:29,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:29,437 INFO L93 Difference]: Finished difference Result 1738 states and 2628 transitions. [2023-11-23 20:33:29,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:33:29,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-23 20:33:29,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:29,474 INFO L225 Difference]: With dead ends: 1738 [2023-11-23 20:33:29,474 INFO L226 Difference]: Without dead ends: 1126 [2023-11-23 20:33:29,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:33:29,495 INFO L413 NwaCegarLoop]: 767 mSDtfsCounter, 772 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:29,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [772 Valid, 1503 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-11-23 20:33:29,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2023-11-23 20:33:29,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 1112. [2023-11-23 20:33:29,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 707 states have (on average 1.3932107496463932) internal successors, (985), 739 states have internal predecessors, (985), 318 states have call successors, (318), 87 states have call predecessors, (318), 86 states have return successors, (312), 301 states have call predecessors, (312), 312 states have call successors, (312) [2023-11-23 20:33:29,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1615 transitions. [2023-11-23 20:33:29,747 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1615 transitions. Word has length 14 [2023-11-23 20:33:29,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:29,747 INFO L495 AbstractCegarLoop]: Abstraction has 1112 states and 1615 transitions. [2023-11-23 20:33:29,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:33:29,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1615 transitions. [2023-11-23 20:33:29,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 20:33:29,755 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:29,756 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:29,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:33:29,756 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:29,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:29,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1261408017, now seen corresponding path program 1 times [2023-11-23 20:33:29,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:29,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045921000] [2023-11-23 20:33:29,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:29,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:29,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:30,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:30,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045921000] [2023-11-23 20:33:30,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045921000] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:30,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:30,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:33:30,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196900340] [2023-11-23 20:33:30,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:30,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:33:30,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:30,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:33:30,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:33:30,073 INFO L87 Difference]: Start difference. First operand 1112 states and 1615 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:33:31,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:33:34,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:34,538 INFO L93 Difference]: Finished difference Result 2814 states and 4063 transitions. [2023-11-23 20:33:34,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:33:34,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-23 20:33:34,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:34,553 INFO L225 Difference]: With dead ends: 2814 [2023-11-23 20:33:34,554 INFO L226 Difference]: Without dead ends: 1703 [2023-11-23 20:33:34,559 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 20:33:34,561 INFO L413 NwaCegarLoop]: 771 mSDtfsCounter, 740 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:34,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [740 Valid, 1387 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-11-23 20:33:34,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2023-11-23 20:33:34,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1689. [2023-11-23 20:33:34,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1689 states, 1060 states have (on average 1.3754716981132076) internal successors, (1458), 1107 states have internal predecessors, (1458), 489 states have call successors, (489), 140 states have call predecessors, (489), 139 states have return successors, (483), 468 states have call predecessors, (483), 483 states have call successors, (483) [2023-11-23 20:33:34,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 2430 transitions. [2023-11-23 20:33:34,669 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 2430 transitions. Word has length 16 [2023-11-23 20:33:34,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:34,669 INFO L495 AbstractCegarLoop]: Abstraction has 1689 states and 2430 transitions. [2023-11-23 20:33:34,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:33:34,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 2430 transitions. [2023-11-23 20:33:34,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 20:33:34,676 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:34,676 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:34,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:33:34,677 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:34,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:34,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1546976143, now seen corresponding path program 1 times [2023-11-23 20:33:34,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:34,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547036271] [2023-11-23 20:33:34,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:34,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:34,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:34,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:34,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:34,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547036271] [2023-11-23 20:33:34,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547036271] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:34,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:34,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:33:34,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480006962] [2023-11-23 20:33:34,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:34,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:33:34,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:34,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:33:34,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:33:34,864 INFO L87 Difference]: Start difference. First operand 1689 states and 2430 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:33:37,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:37,212 INFO L93 Difference]: Finished difference Result 3138 states and 4504 transitions. [2023-11-23 20:33:37,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:33:37,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-23 20:33:37,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:37,226 INFO L225 Difference]: With dead ends: 3138 [2023-11-23 20:33:37,227 INFO L226 Difference]: Without dead ends: 1689 [2023-11-23 20:33:37,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:33:37,238 INFO L413 NwaCegarLoop]: 751 mSDtfsCounter, 847 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:37,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [847 Valid, 751 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-23 20:33:37,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2023-11-23 20:33:37,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1689. [2023-11-23 20:33:37,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1689 states, 1060 states have (on average 1.3735849056603773) internal successors, (1456), 1107 states have internal predecessors, (1456), 489 states have call successors, (489), 140 states have call predecessors, (489), 139 states have return successors, (483), 468 states have call predecessors, (483), 483 states have call successors, (483) [2023-11-23 20:33:37,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 2428 transitions. [2023-11-23 20:33:37,357 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 2428 transitions. Word has length 15 [2023-11-23 20:33:37,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:37,357 INFO L495 AbstractCegarLoop]: Abstraction has 1689 states and 2428 transitions. [2023-11-23 20:33:37,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:33:37,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 2428 transitions. [2023-11-23 20:33:37,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 20:33:37,362 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:37,362 INFO L195 NwaCegarLoop]: trace histogram [1, 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 20:33:37,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:33:37,363 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:37,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:37,363 INFO L85 PathProgramCache]: Analyzing trace with hash 2141124752, now seen corresponding path program 1 times [2023-11-23 20:33:37,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:37,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330021444] [2023-11-23 20:33:37,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:37,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:37,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:37,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:37,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:37,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330021444] [2023-11-23 20:33:37,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330021444] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:37,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:37,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:33:37,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831519264] [2023-11-23 20:33:37,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:37,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:33:37,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:37,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:33:37,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:33:37,602 INFO L87 Difference]: Start difference. First operand 1689 states and 2428 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:33:42,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:42,126 INFO L93 Difference]: Finished difference Result 3152 states and 4522 transitions. [2023-11-23 20:33:42,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:33:42,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-11-23 20:33:42,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:42,144 INFO L225 Difference]: With dead ends: 3152 [2023-11-23 20:33:42,144 INFO L226 Difference]: Without dead ends: 1703 [2023-11-23 20:33:42,152 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 20:33:42,155 INFO L413 NwaCegarLoop]: 750 mSDtfsCounter, 9 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1499 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:42,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1499 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-11-23 20:33:42,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2023-11-23 20:33:42,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1691. [2023-11-23 20:33:42,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1062 states have (on average 1.3728813559322033) internal successors, (1458), 1109 states have internal predecessors, (1458), 489 states have call successors, (489), 140 states have call predecessors, (489), 139 states have return successors, (483), 468 states have call predecessors, (483), 483 states have call successors, (483) [2023-11-23 20:33:42,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 2430 transitions. [2023-11-23 20:33:42,283 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 2430 transitions. Word has length 25 [2023-11-23 20:33:42,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:42,284 INFO L495 AbstractCegarLoop]: Abstraction has 1691 states and 2430 transitions. [2023-11-23 20:33:42,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:33:42,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 2430 transitions. [2023-11-23 20:33:42,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 20:33:42,287 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:42,288 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 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 20:33:42,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 20:33:42,288 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:42,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:42,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1852900651, now seen corresponding path program 1 times [2023-11-23 20:33:42,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:42,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947143191] [2023-11-23 20:33:42,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:42,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:42,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:42,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:42,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947143191] [2023-11-23 20:33:42,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947143191] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:42,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099401326] [2023-11-23 20:33:42,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:42,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:42,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:42,508 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:42,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:33:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:43,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 1109 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:33:43,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:43,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:33:43,125 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:43,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099401326] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:43,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:33:43,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-23 20:33:43,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492783219] [2023-11-23 20:33:43,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:43,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:33:43,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:43,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:33:43,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:33:43,131 INFO L87 Difference]: Start difference. First operand 1691 states and 2430 transitions. 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, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:33:46,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:46,917 INFO L93 Difference]: Finished difference Result 3170 states and 4550 transitions. [2023-11-23 20:33:46,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:33:46,918 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, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-11-23 20:33:46,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:46,937 INFO L225 Difference]: With dead ends: 3170 [2023-11-23 20:33:46,937 INFO L226 Difference]: Without dead ends: 1719 [2023-11-23 20:33:46,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:33:46,946 INFO L413 NwaCegarLoop]: 755 mSDtfsCounter, 11 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1502 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:46,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 1502 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-23 20:33:46,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2023-11-23 20:33:47,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1695. [2023-11-23 20:33:47,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1695 states, 1066 states have (on average 1.3714821763602252) internal successors, (1462), 1113 states have internal predecessors, (1462), 489 states have call successors, (489), 140 states have call predecessors, (489), 139 states have return successors, (483), 468 states have call predecessors, (483), 483 states have call successors, (483) [2023-11-23 20:33:47,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 2434 transitions. [2023-11-23 20:33:47,070 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 2434 transitions. Word has length 28 [2023-11-23 20:33:47,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:47,071 INFO L495 AbstractCegarLoop]: Abstraction has 1695 states and 2434 transitions. [2023-11-23 20:33:47,071 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, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:33:47,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 2434 transitions. [2023-11-23 20:33:47,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-23 20:33:47,073 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:47,073 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 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 20:33:47,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:47,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:47,288 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:47,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:47,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1969441523, now seen corresponding path program 1 times [2023-11-23 20:33:47,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:47,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072067529] [2023-11-23 20:33:47,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:47,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:47,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:47,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:47,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072067529] [2023-11-23 20:33:47,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072067529] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:47,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426625571] [2023-11-23 20:33:47,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:47,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:47,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:47,572 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:47,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:33:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:48,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 1183 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:33:48,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:48,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:33:48,180 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:48,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426625571] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:48,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:33:48,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-23 20:33:48,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316390702] [2023-11-23 20:33:48,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:48,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:33:48,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:48,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:33:48,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:33:48,183 INFO L87 Difference]: Start difference. First operand 1695 states and 2434 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:33:52,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:52,193 INFO L93 Difference]: Finished difference Result 3176 states and 4554 transitions. [2023-11-23 20:33:52,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:33:52,194 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), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2023-11-23 20:33:52,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:52,210 INFO L225 Difference]: With dead ends: 3176 [2023-11-23 20:33:52,210 INFO L226 Difference]: Without dead ends: 1721 [2023-11-23 20:33:52,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:33:52,219 INFO L413 NwaCegarLoop]: 750 mSDtfsCounter, 21 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:52,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1482 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-11-23 20:33:52,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2023-11-23 20:33:52,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1719. [2023-11-23 20:33:52,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1084 states have (on average 1.3726937269372694) internal successors, (1488), 1131 states have internal predecessors, (1488), 495 states have call successors, (495), 140 states have call predecessors, (495), 139 states have return successors, (489), 474 states have call predecessors, (489), 489 states have call successors, (489) [2023-11-23 20:33:52,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2472 transitions. [2023-11-23 20:33:52,329 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2472 transitions. Word has length 32 [2023-11-23 20:33:52,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:52,330 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 2472 transitions. [2023-11-23 20:33:52,330 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), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:33:52,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2472 transitions. [2023-11-23 20:33:52,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-23 20:33:52,336 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:52,336 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 20:33:52,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:52,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 20:33:52,552 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:52,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:52,552 INFO L85 PathProgramCache]: Analyzing trace with hash -920880691, now seen corresponding path program 1 times [2023-11-23 20:33:52,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:52,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481547085] [2023-11-23 20:33:52,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:52,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:52,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:52,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 20:33:52,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:52,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481547085] [2023-11-23 20:33:52,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481547085] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:52,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112377852] [2023-11-23 20:33:52,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:52,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:52,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:52,875 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:52,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:33:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:53,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 1229 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:33:53,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:53,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:33:53,542 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:53,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112377852] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:53,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:33:53,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 20:33:53,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949442087] [2023-11-23 20:33:53,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:53,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:33:53,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:53,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:33:53,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:33:53,549 INFO L87 Difference]: Start difference. First operand 1719 states and 2472 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 20:33:55,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:55,489 INFO L93 Difference]: Finished difference Result 1721 states and 2473 transitions. [2023-11-23 20:33:55,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:33:55,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2023-11-23 20:33:55,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:55,505 INFO L225 Difference]: With dead ends: 1721 [2023-11-23 20:33:55,506 INFO L226 Difference]: Without dead ends: 1718 [2023-11-23 20:33:55,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:33:55,509 INFO L413 NwaCegarLoop]: 749 mSDtfsCounter, 815 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:55,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [815 Valid, 749 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-23 20:33:55,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2023-11-23 20:33:55,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1718. [2023-11-23 20:33:55,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1084 states have (on average 1.371771217712177) internal successors, (1487), 1130 states have internal predecessors, (1487), 494 states have call successors, (494), 140 states have call predecessors, (494), 139 states have return successors, (489), 474 states have call predecessors, (489), 489 states have call successors, (489) [2023-11-23 20:33:55,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 2470 transitions. [2023-11-23 20:33:55,630 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 2470 transitions. Word has length 42 [2023-11-23 20:33:55,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:55,631 INFO L495 AbstractCegarLoop]: Abstraction has 1718 states and 2470 transitions. [2023-11-23 20:33:55,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 20:33:55,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 2470 transitions. [2023-11-23 20:33:55,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-23 20:33:55,634 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:55,634 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 20:33:55,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:55,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:55,848 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:55,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:55,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1517096528, now seen corresponding path program 1 times [2023-11-23 20:33:55,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:55,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023598035] [2023-11-23 20:33:55,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:55,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:55,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:56,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 20:33:56,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:56,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023598035] [2023-11-23 20:33:56,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023598035] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:56,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269631844] [2023-11-23 20:33:56,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:56,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:56,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:56,148 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:56,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:33:56,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:56,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 1231 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:33:56,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:56,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:33:56,815 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:56,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269631844] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:56,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:33:56,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 20:33:56,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637885081] [2023-11-23 20:33:56,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:56,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:33:56,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:56,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:33:56,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:33:56,817 INFO L87 Difference]: Start difference. First operand 1718 states and 2470 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 20:33:58,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:58,715 INFO L93 Difference]: Finished difference Result 1720 states and 2471 transitions. [2023-11-23 20:33:58,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:33:58,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2023-11-23 20:33:58,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:58,729 INFO L225 Difference]: With dead ends: 1720 [2023-11-23 20:33:58,729 INFO L226 Difference]: Without dead ends: 1717 [2023-11-23 20:33:58,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:33:58,732 INFO L413 NwaCegarLoop]: 747 mSDtfsCounter, 812 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:58,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [812 Valid, 747 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-23 20:33:58,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2023-11-23 20:33:58,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1717. [2023-11-23 20:33:58,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1084 states have (on average 1.3708487084870848) internal successors, (1486), 1129 states have internal predecessors, (1486), 493 states have call successors, (493), 140 states have call predecessors, (493), 139 states have return successors, (489), 474 states have call predecessors, (489), 489 states have call successors, (489) [2023-11-23 20:33:58,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 2468 transitions. [2023-11-23 20:33:58,857 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 2468 transitions. Word has length 43 [2023-11-23 20:33:58,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:58,858 INFO L495 AbstractCegarLoop]: Abstraction has 1717 states and 2468 transitions. [2023-11-23 20:33:58,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 20:33:58,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 2468 transitions. [2023-11-23 20:33:58,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-23 20:33:58,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:58,861 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 20:33:58,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:59,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-23 20:33:59,076 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:33:59,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:59,076 INFO L85 PathProgramCache]: Analyzing trace with hash -215016144, now seen corresponding path program 1 times [2023-11-23 20:33:59,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:59,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142610393] [2023-11-23 20:33:59,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:59,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:59,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:59,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 20:33:59,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:59,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142610393] [2023-11-23 20:33:59,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142610393] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:59,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527137721] [2023-11-23 20:33:59,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:59,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:59,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:59,284 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:59,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 20:33:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:59,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 1233 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:33:59,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:59,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:33:59,894 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:59,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527137721] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:59,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:33:59,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 20:33:59,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723308492] [2023-11-23 20:33:59,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:59,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:33:59,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:59,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:33:59,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:33:59,897 INFO L87 Difference]: Start difference. First operand 1717 states and 2468 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 20:34:02,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:02,172 INFO L93 Difference]: Finished difference Result 1719 states and 2469 transitions. [2023-11-23 20:34:02,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:34:02,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2023-11-23 20:34:02,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:02,199 INFO L225 Difference]: With dead ends: 1719 [2023-11-23 20:34:02,199 INFO L226 Difference]: Without dead ends: 1716 [2023-11-23 20:34:02,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:34:02,205 INFO L413 NwaCegarLoop]: 745 mSDtfsCounter, 809 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 809 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:02,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [809 Valid, 745 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-23 20:34:02,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2023-11-23 20:34:02,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1716. [2023-11-23 20:34:02,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1084 states have (on average 1.3699261992619927) internal successors, (1485), 1128 states have internal predecessors, (1485), 492 states have call successors, (492), 140 states have call predecessors, (492), 139 states have return successors, (489), 474 states have call predecessors, (489), 489 states have call successors, (489) [2023-11-23 20:34:02,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 2466 transitions. [2023-11-23 20:34:02,374 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 2466 transitions. Word has length 44 [2023-11-23 20:34:02,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:02,375 INFO L495 AbstractCegarLoop]: Abstraction has 1716 states and 2466 transitions. [2023-11-23 20:34:02,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 2 states have internal predecessors, (34), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 20:34:02,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 2466 transitions. [2023-11-23 20:34:02,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-23 20:34:02,378 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:02,379 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 20:34:02,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 20:34:02,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:02,600 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:02,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:02,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1924070739, now seen corresponding path program 1 times [2023-11-23 20:34:02,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:02,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498802456] [2023-11-23 20:34:02,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:02,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:02,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:02,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 20:34:02,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:02,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498802456] [2023-11-23 20:34:02,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498802456] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:34:02,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064529503] [2023-11-23 20:34:02,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:02,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:02,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:34:02,914 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:34:02,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1368a87e-7426-40aa-96e9-876686d40ae3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 20:34:03,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:03,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 1235 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:34:03,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:34:03,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:34:03,590 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:34:03,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064529503] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:03,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:34:03,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 20:34:03,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681805510] [2023-11-23 20:34:03,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:03,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:34:03,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:03,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:34:03,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:34:03,593 INFO L87 Difference]: Start difference. First operand 1716 states and 2466 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4)