./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--block--paride--pt.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--block--paride--pt.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5 --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 0e5349f2aac0388d197fa32950f3e69d3339933dee46585f91772f9bda921aa4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:03:46,682 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:03:46,810 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-21 19:03:46,822 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:03:46,824 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:03:46,872 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:03:46,873 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:03:46,874 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:03:46,875 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:03:46,881 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:03:46,882 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:03:46,883 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:03:46,883 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:03:46,885 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:03:46,886 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:03:46,886 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:03:46,887 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:03:46,888 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:03:46,888 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:03:46,889 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:03:46,889 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:03:46,890 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:03:46,892 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:03:46,892 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:03:46,893 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:03:46,893 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:03:46,894 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:03:46,894 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:03:46,895 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:03:46,896 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:03:46,897 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:03:46,898 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:03:46,898 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:03:46,898 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:03:46,899 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:03:46,899 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:03:46,900 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:03:46,900 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:03:46,900 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:03:46,901 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:03:46,901 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:03:46,902 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:03:46,902 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:03:46,904 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:03:46,905 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_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e5349f2aac0388d197fa32950f3e69d3339933dee46585f91772f9bda921aa4 [2023-11-21 19:03:47,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:03:47,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:03:47,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:03:47,309 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:03:47,309 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:03:47,311 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--block--paride--pt.ko-entry_point.cil.out.i [2023-11-21 19:03:50,693 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:03:51,265 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:03:51,266 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--block--paride--pt.ko-entry_point.cil.out.i [2023-11-21 19:03:51,318 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/data/6177882db/ee6e85d494db4abfad9f298904d6b6ee/FLAG61080f97f [2023-11-21 19:03:51,339 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/data/6177882db/ee6e85d494db4abfad9f298904d6b6ee [2023-11-21 19:03:51,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:03:51,349 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:03:51,356 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:03:51,356 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:03:51,367 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:03:51,368 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:03:51" (1/1) ... [2023-11-21 19:03:51,369 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@387115de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:03:51, skipping insertion in model container [2023-11-21 19:03:51,369 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:03:51" (1/1) ... [2023-11-21 19:03:51,483 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:03:52,053 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3059] [2023-11-21 19:03:52,054 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3060-3061] [2023-11-21 19:03:52,267 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_782c0d68-3d4e-490f-8c10-dd830fdd6404/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--block--paride--pt.ko-entry_point.cil.out.i[90990,91003] [2023-11-21 19:03:52,912 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:03:52,965 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:03:53,082 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3059] [2023-11-21 19:03:53,083 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3060-3061] [2023-11-21 19:03:53,089 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; incl %0": "+m" (v->counter)); [3171] [2023-11-21 19:03:53,091 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; decl %0; sete %1": "+m" (v->counter), "=qm" (c): : "memory"); [3179-3180] [2023-11-21 19:03:53,099 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_782c0d68-3d4e-490f-8c10-dd830fdd6404/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--block--paride--pt.ko-entry_point.cil.out.i[90990,91003] [2023-11-21 19:03:53,270 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:03:53,317 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:03:53,318 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:03:53 WrapperNode [2023-11-21 19:03:53,318 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:03:53,319 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:03:53,320 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:03:53,320 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:03:53,328 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:03:53" (1/1) ... [2023-11-21 19:03:53,398 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:03:53" (1/1) ... [2023-11-21 19:03:53,488 INFO L138 Inliner]: procedures = 119, calls = 789, calls flagged for inlining = 38, calls inlined = 36, statements flattened = 1734 [2023-11-21 19:03:53,490 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:03:53,490 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:03:53,491 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:03:53,491 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:03:53,501 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:03:53" (1/1) ... [2023-11-21 19:03:53,501 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:03:53" (1/1) ... [2023-11-21 19:03:53,515 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:03:53" (1/1) ... [2023-11-21 19:03:53,515 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:03:53" (1/1) ... [2023-11-21 19:03:53,607 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:03:53" (1/1) ... [2023-11-21 19:03:53,637 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:03:53" (1/1) ... [2023-11-21 19:03:53,655 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:03:53" (1/1) ... [2023-11-21 19:03:53,675 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:03:53" (1/1) ... [2023-11-21 19:03:53,701 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:03:53,703 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:03:53,703 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:03:53,703 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:03:53,704 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:03:53" (1/1) ... [2023-11-21 19:03:53,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:03:53,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:03:53,820 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:03:53,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:03:53,866 INFO L130 BoogieDeclarations]: Found specification of procedure pi_release [2023-11-21 19:03:53,867 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_release [2023-11-21 19:03:53,867 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2023-11-21 19:03:53,867 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2023-11-21 19:03:53,868 INFO L130 BoogieDeclarations]: Found specification of procedure pi_disconnect [2023-11-21 19:03:53,868 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_disconnect [2023-11-21 19:03:53,868 INFO L130 BoogieDeclarations]: Found specification of procedure status_reg [2023-11-21 19:03:53,868 INFO L138 BoogieDeclarations]: Found implementation of procedure status_reg [2023-11-21 19:03:53,868 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-21 19:03:53,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-21 19:03:53,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 19:03:53,869 INFO L130 BoogieDeclarations]: Found specification of procedure pi_read_block [2023-11-21 19:03:53,869 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_read_block [2023-11-21 19:03:53,869 INFO L130 BoogieDeclarations]: Found specification of procedure read_reg [2023-11-21 19:03:53,870 INFO L138 BoogieDeclarations]: Found implementation of procedure read_reg [2023-11-21 19:03:53,871 INFO L130 BoogieDeclarations]: Found specification of procedure pt_media_access_cmd [2023-11-21 19:03:53,871 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_media_access_cmd [2023-11-21 19:03:53,871 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-21 19:03:53,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-21 19:03:53,872 INFO L130 BoogieDeclarations]: Found specification of procedure pt_reset [2023-11-21 19:03:53,873 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_reset [2023-11-21 19:03:53,873 INFO L130 BoogieDeclarations]: Found specification of procedure pt_identify [2023-11-21 19:03:53,873 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_identify [2023-11-21 19:03:53,875 INFO L130 BoogieDeclarations]: Found specification of procedure pt_command [2023-11-21 19:03:53,875 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_command [2023-11-21 19:03:53,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 19:03:53,875 INFO L130 BoogieDeclarations]: Found specification of procedure pt_write [2023-11-21 19:03:53,876 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_write [2023-11-21 19:03:53,876 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-21 19:03:53,877 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-21 19:03:53,877 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-21 19:03:53,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-21 19:03:53,877 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-21 19:03:53,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-21 19:03:53,877 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-21 19:03:53,878 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-21 19:03:53,878 INFO L130 BoogieDeclarations]: Found specification of procedure pt_atapi [2023-11-21 19:03:53,878 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_atapi [2023-11-21 19:03:53,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 19:03:53,878 INFO L130 BoogieDeclarations]: Found specification of procedure pt_poll_dsc [2023-11-21 19:03:53,878 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_poll_dsc [2023-11-21 19:03:53,879 INFO L130 BoogieDeclarations]: Found specification of procedure pt_req_sense [2023-11-21 19:03:53,879 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_req_sense [2023-11-21 19:03:53,879 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2023-11-21 19:03:53,879 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2023-11-21 19:03:53,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:03:53,879 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2023-11-21 19:03:53,879 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2023-11-21 19:03:53,880 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2023-11-21 19:03:53,880 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2023-11-21 19:03:53,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 19:03:53,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 19:03:53,880 INFO L130 BoogieDeclarations]: Found specification of procedure DRIVE [2023-11-21 19:03:53,881 INFO L138 BoogieDeclarations]: Found implementation of procedure DRIVE [2023-11-21 19:03:53,881 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2023-11-21 19:03:53,881 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2023-11-21 19:03:53,882 INFO L130 BoogieDeclarations]: Found specification of procedure pt_completion [2023-11-21 19:03:53,882 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_completion [2023-11-21 19:03:53,883 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 19:03:53,883 INFO L130 BoogieDeclarations]: Found specification of procedure pt_sleep [2023-11-21 19:03:53,883 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_sleep [2023-11-21 19:03:53,883 INFO L130 BoogieDeclarations]: Found specification of procedure pt_write_fm [2023-11-21 19:03:53,883 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_write_fm [2023-11-21 19:03:53,883 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_20 [2023-11-21 19:03:53,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_20 [2023-11-21 19:03:53,884 INFO L130 BoogieDeclarations]: Found specification of procedure iminor [2023-11-21 19:03:53,884 INFO L138 BoogieDeclarations]: Found implementation of procedure iminor [2023-11-21 19:03:53,884 INFO L130 BoogieDeclarations]: Found specification of procedure pi_write_block [2023-11-21 19:03:53,884 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_write_block [2023-11-21 19:03:53,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 19:03:53,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-21 19:03:53,885 INFO L130 BoogieDeclarations]: Found specification of procedure pi_init [2023-11-21 19:03:53,885 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_init [2023-11-21 19:03:53,885 INFO L130 BoogieDeclarations]: Found specification of procedure pi_read_regr [2023-11-21 19:03:53,885 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_read_regr [2023-11-21 19:03:53,886 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2023-11-21 19:03:53,886 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2023-11-21 19:03:53,886 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-21 19:03:53,886 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-21 19:03:53,886 INFO L130 BoogieDeclarations]: Found specification of procedure pt_wait [2023-11-21 19:03:53,887 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_wait [2023-11-21 19:03:53,887 INFO L130 BoogieDeclarations]: Found specification of procedure pi_connect [2023-11-21 19:03:53,887 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_connect [2023-11-21 19:03:53,888 INFO L130 BoogieDeclarations]: Found specification of procedure device_destroy [2023-11-21 19:03:53,888 INFO L138 BoogieDeclarations]: Found implementation of procedure device_destroy [2023-11-21 19:03:53,888 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2023-11-21 19:03:53,888 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2023-11-21 19:03:53,888 INFO L130 BoogieDeclarations]: Found specification of procedure pt_probe [2023-11-21 19:03:53,888 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_probe [2023-11-21 19:03:53,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:03:53,889 INFO L130 BoogieDeclarations]: Found specification of procedure pt_rewind [2023-11-21 19:03:53,889 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_rewind [2023-11-21 19:03:53,889 INFO L130 BoogieDeclarations]: Found specification of procedure device_create [2023-11-21 19:03:53,889 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create [2023-11-21 19:03:53,889 INFO L130 BoogieDeclarations]: Found specification of procedure xn [2023-11-21 19:03:53,889 INFO L138 BoogieDeclarations]: Found implementation of procedure xn [2023-11-21 19:03:53,890 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-21 19:03:53,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-21 19:03:53,890 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2023-11-21 19:03:53,890 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2023-11-21 19:03:53,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:03:53,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:03:53,890 INFO L130 BoogieDeclarations]: Found specification of procedure xs [2023-11-21 19:03:53,891 INFO L138 BoogieDeclarations]: Found implementation of procedure xs [2023-11-21 19:03:53,891 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-11-21 19:03:53,891 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-11-21 19:03:54,325 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:03:54,329 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:03:54,439 INFO L774 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-21 19:04:01,615 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:04:02,451 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:04:02,451 INFO L308 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-21 19:04:02,453 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:04:02 BoogieIcfgContainer [2023-11-21 19:04:02,453 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:04:02,457 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:04:02,457 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:04:02,460 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:04:02,461 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:03:51" (1/3) ... [2023-11-21 19:04:02,462 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cd82001 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:04:02, skipping insertion in model container [2023-11-21 19:04:02,463 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:03:53" (2/3) ... [2023-11-21 19:04:02,463 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cd82001 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:04:02, skipping insertion in model container [2023-11-21 19:04:02,464 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:04:02" (3/3) ... [2023-11-21 19:04:02,465 INFO L112 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--block--paride--pt.ko-entry_point.cil.out.i [2023-11-21 19:04:02,483 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:04:02,484 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 19:04:02,569 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:04:02,577 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;@632f7d4d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:04:02,578 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 19:04:02,586 INFO L276 IsEmpty]: Start isEmpty. Operand has 632 states, 392 states have (on average 1.3545918367346939) internal successors, (531), 411 states have internal predecessors, (531), 196 states have call successors, (196), 47 states have call predecessors, (196), 46 states have return successors, (193), 193 states have call predecessors, (193), 193 states have call successors, (193) [2023-11-21 19:04:02,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-21 19:04:02,619 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:04:02,620 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:04:02,620 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:04:02,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:04:02,626 INFO L85 PathProgramCache]: Analyzing trace with hash -544458961, now seen corresponding path program 1 times [2023-11-21 19:04:02,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:04:02,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522643000] [2023-11-21 19:04:02,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:04:02,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:04:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:04:03,675 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-21 19:04:03,676 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:04:03,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522643000] [2023-11-21 19:04:03,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522643000] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:04:03,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:04:03,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:04:03,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328780745] [2023-11-21 19:04:03,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:04:03,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:04:03,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:04:03,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:04:03,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:04:03,740 INFO L87 Difference]: Start difference. First operand has 632 states, 392 states have (on average 1.3545918367346939) internal successors, (531), 411 states have internal predecessors, (531), 196 states have call successors, (196), 47 states have call predecessors, (196), 46 states have return successors, (193), 193 states have call predecessors, (193), 193 states have call successors, (193) Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-21 19:04:05,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:04:05,830 INFO L93 Difference]: Finished difference Result 1547 states and 2270 transitions. [2023-11-21 19:04:05,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:04:05,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 105 [2023-11-21 19:04:05,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:04:05,853 INFO L225 Difference]: With dead ends: 1547 [2023-11-21 19:04:05,854 INFO L226 Difference]: Without dead ends: 886 [2023-11-21 19:04:05,867 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 [2023-11-21 19:04:05,870 INFO L413 NwaCegarLoop]: 978 mSDtfsCounter, 440 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 1727 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-21 19:04:05,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 1727 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-21 19:04:05,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2023-11-21 19:04:05,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 886. [2023-11-21 19:04:05,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 545 states have (on average 1.3302752293577982) internal successors, (725), 561 states have internal predecessors, (725), 268 states have call successors, (268), 73 states have call predecessors, (268), 72 states have return successors, (267), 267 states have call predecessors, (267), 267 states have call successors, (267) [2023-11-21 19:04:06,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1260 transitions. [2023-11-21 19:04:06,007 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1260 transitions. Word has length 105 [2023-11-21 19:04:06,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:04:06,008 INFO L495 AbstractCegarLoop]: Abstraction has 886 states and 1260 transitions. [2023-11-21 19:04:06,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-21 19:04:06,009 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1260 transitions. [2023-11-21 19:04:06,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-11-21 19:04:06,024 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:04:06,025 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:04:06,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:04:06,026 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:04:06,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:04:06,026 INFO L85 PathProgramCache]: Analyzing trace with hash 21302686, now seen corresponding path program 1 times [2023-11-21 19:04:06,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:04:06,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157146375] [2023-11-21 19:04:06,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:04:06,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:04:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:04:06,947 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-21 19:04:06,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:04:06,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157146375] [2023-11-21 19:04:06,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157146375] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:04:06,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:04:06,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:04:06,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385037985] [2023-11-21 19:04:06,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:04:06,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:04:06,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:04:06,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:04:06,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:04:06,952 INFO L87 Difference]: Start difference. First operand 886 states and 1260 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-21 19:04:08,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:04:08,835 INFO L93 Difference]: Finished difference Result 1771 states and 2530 transitions. [2023-11-21 19:04:08,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:04:08,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 142 [2023-11-21 19:04:08,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:04:08,844 INFO L225 Difference]: With dead ends: 1771 [2023-11-21 19:04:08,844 INFO L226 Difference]: Without dead ends: 910 [2023-11-21 19:04:08,848 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 [2023-11-21 19:04:08,850 INFO L413 NwaCegarLoop]: 758 mSDtfsCounter, 12 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1512 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-21 19:04:08,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 1512 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-21 19:04:08,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2023-11-21 19:04:08,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 888. [2023-11-21 19:04:08,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 547 states have (on average 1.3290676416819014) internal successors, (727), 563 states have internal predecessors, (727), 268 states have call successors, (268), 73 states have call predecessors, (268), 72 states have return successors, (267), 267 states have call predecessors, (267), 267 states have call successors, (267) [2023-11-21 19:04:08,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1262 transitions. [2023-11-21 19:04:08,910 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1262 transitions. Word has length 142 [2023-11-21 19:04:08,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:04:08,911 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1262 transitions. [2023-11-21 19:04:08,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-21 19:04:08,911 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1262 transitions. [2023-11-21 19:04:08,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-21 19:04:08,917 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:04:08,917 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:04:08,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 19:04:08,918 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:04:08,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:04:08,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1532947190, now seen corresponding path program 1 times [2023-11-21 19:04:08,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:04:08,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237084562] [2023-11-21 19:04:08,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:04:08,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:04:09,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:04:09,490 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-21 19:04:09,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:04:09,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237084562] [2023-11-21 19:04:09,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237084562] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:04:09,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:04:09,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:04:09,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971536668] [2023-11-21 19:04:09,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:04:09,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:04:09,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:04:09,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:04:09,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:04:09,495 INFO L87 Difference]: Start difference. First operand 888 states and 1262 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-21 19:04:11,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:04:11,268 INFO L93 Difference]: Finished difference Result 1769 states and 2524 transitions. [2023-11-21 19:04:11,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:04:11,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 146 [2023-11-21 19:04:11,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:04:11,277 INFO L225 Difference]: With dead ends: 1769 [2023-11-21 19:04:11,278 INFO L226 Difference]: Without dead ends: 906 [2023-11-21 19:04:11,284 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 [2023-11-21 19:04:11,289 INFO L413 NwaCegarLoop]: 765 mSDtfsCounter, 12 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1510 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-21 19:04:11,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 1510 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-21 19:04:11,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2023-11-21 19:04:11,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 898. [2023-11-21 19:04:11,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 557 states have (on average 1.333931777378815) internal successors, (743), 573 states have internal predecessors, (743), 268 states have call successors, (268), 73 states have call predecessors, (268), 72 states have return successors, (267), 267 states have call predecessors, (267), 267 states have call successors, (267) [2023-11-21 19:04:11,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1278 transitions. [2023-11-21 19:04:11,346 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1278 transitions. Word has length 146 [2023-11-21 19:04:11,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:04:11,347 INFO L495 AbstractCegarLoop]: Abstraction has 898 states and 1278 transitions. [2023-11-21 19:04:11,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-21 19:04:11,347 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1278 transitions. [2023-11-21 19:04:11,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-21 19:04:11,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:04:11,355 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:04:11,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 19:04:11,356 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:04:11,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:04:11,358 INFO L85 PathProgramCache]: Analyzing trace with hash -276661501, now seen corresponding path program 1 times [2023-11-21 19:04:11,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:04:11,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584312454] [2023-11-21 19:04:11,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:04:11,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:04:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:04:12,143 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-21 19:04:12,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:04:12,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584312454] [2023-11-21 19:04:12,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584312454] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:04:12,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423664764] [2023-11-21 19:04:12,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:04:12,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:04:12,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:04:12,153 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:04:12,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:04:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:04:13,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 2148 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-21 19:04:13,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:04:13,299 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-21 19:04:13,306 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:04:13,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423664764] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:04:13,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:04:13,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-21 19:04:13,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189449473] [2023-11-21 19:04:13,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:04:13,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:04:13,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:04:13,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:04:13,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:04:13,311 INFO L87 Difference]: Start difference. First operand 898 states and 1278 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2023-11-21 19:04:15,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:04:15,268 INFO L93 Difference]: Finished difference Result 1783 states and 2545 transitions. [2023-11-21 19:04:15,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:04:15,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 151 [2023-11-21 19:04:15,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:04:15,276 INFO L225 Difference]: With dead ends: 1783 [2023-11-21 19:04:15,277 INFO L226 Difference]: Without dead ends: 910 [2023-11-21 19:04:15,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:04:15,282 INFO L413 NwaCegarLoop]: 760 mSDtfsCounter, 9 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-21 19:04:15,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1513 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-21 19:04:15,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2023-11-21 19:04:15,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 900. [2023-11-21 19:04:15,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 559 states have (on average 1.332737030411449) internal successors, (745), 575 states have internal predecessors, (745), 268 states have call successors, (268), 73 states have call predecessors, (268), 72 states have return successors, (267), 267 states have call predecessors, (267), 267 states have call successors, (267) [2023-11-21 19:04:15,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1280 transitions. [2023-11-21 19:04:15,333 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1280 transitions. Word has length 151 [2023-11-21 19:04:15,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:04:15,333 INFO L495 AbstractCegarLoop]: Abstraction has 900 states and 1280 transitions. [2023-11-21 19:04:15,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2023-11-21 19:04:15,334 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1280 transitions. [2023-11-21 19:04:15,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-11-21 19:04:15,340 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:04:15,340 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:04:15,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-21 19:04:15,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:04:15,562 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:04:15,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:04:15,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1831285170, now seen corresponding path program 1 times [2023-11-21 19:04:15,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:04:15,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816951713] [2023-11-21 19:04:15,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:04:15,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:04:15,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:04:16,340 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-21 19:04:16,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:04:16,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816951713] [2023-11-21 19:04:16,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816951713] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:04:16,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308718557] [2023-11-21 19:04:16,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:04:16,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:04:16,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:04:16,342 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:04:16,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 19:04:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:04:17,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 2155 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 19:04:17,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:04:17,512 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-21 19:04:17,512 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:04:17,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308718557] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:04:17,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:04:17,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-21 19:04:17,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585235824] [2023-11-21 19:04:17,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:04:17,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:04:17,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:04:17,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:04:17,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:04:17,515 INFO L87 Difference]: Start difference. First operand 900 states and 1280 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-11-21 19:04:20,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:04:20,064 INFO L93 Difference]: Finished difference Result 1821 states and 2606 transitions. [2023-11-21 19:04:20,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:04:20,065 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 154 [2023-11-21 19:04:20,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:04:20,072 INFO L225 Difference]: With dead ends: 1821 [2023-11-21 19:04:20,072 INFO L226 Difference]: Without dead ends: 946 [2023-11-21 19:04:20,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:04:20,079 INFO L413 NwaCegarLoop]: 764 mSDtfsCounter, 15 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-21 19:04:20,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1516 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-21 19:04:20,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2023-11-21 19:04:20,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 944. [2023-11-21 19:04:20,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 591 states have (on average 1.3417935702199661) internal successors, (793), 607 states have internal predecessors, (793), 280 states have call successors, (280), 73 states have call predecessors, (280), 72 states have return successors, (279), 279 states have call predecessors, (279), 279 states have call successors, (279) [2023-11-21 19:04:20,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1352 transitions. [2023-11-21 19:04:20,135 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1352 transitions. Word has length 154 [2023-11-21 19:04:20,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:04:20,136 INFO L495 AbstractCegarLoop]: Abstraction has 944 states and 1352 transitions. [2023-11-21 19:04:20,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-11-21 19:04:20,136 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1352 transitions. [2023-11-21 19:04:20,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-21 19:04:20,143 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:04:20,143 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:04:20,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 19:04:20,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:04:20,368 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:04:20,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:04:20,369 INFO L85 PathProgramCache]: Analyzing trace with hash -540365121, now seen corresponding path program 1 times [2023-11-21 19:04:20,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:04:20,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709926307] [2023-11-21 19:04:20,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:04:20,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:04:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:04:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-21 19:04:21,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:04:21,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709926307] [2023-11-21 19:04:21,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709926307] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:04:21,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298221170] [2023-11-21 19:04:21,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:04:21,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:04:21,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:04:21,187 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:04:21,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 19:04:22,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:04:22,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 2172 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 19:04:22,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:04:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-21 19:04:22,343 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:04:22,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298221170] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:04:22,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:04:22,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-21 19:04:22,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007175344] [2023-11-21 19:04:22,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:04:22,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:04:22,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:04:22,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:04:22,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:04:22,347 INFO L87 Difference]: Start difference. First operand 944 states and 1352 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-11-21 19:04:24,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:04:24,250 INFO L93 Difference]: Finished difference Result 1869 states and 2715 transitions. [2023-11-21 19:04:24,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:04:24,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 158 [2023-11-21 19:04:24,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:04:24,261 INFO L225 Difference]: With dead ends: 1869 [2023-11-21 19:04:24,261 INFO L226 Difference]: Without dead ends: 950 [2023-11-21 19:04:24,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:04:24,267 INFO L413 NwaCegarLoop]: 762 mSDtfsCounter, 2 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1517 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-21 19:04:24,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1517 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-21 19:04:24,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2023-11-21 19:04:24,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 946. [2023-11-21 19:04:24,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 593 states have (on average 1.3406408094435076) internal successors, (795), 609 states have internal predecessors, (795), 280 states have call successors, (280), 73 states have call predecessors, (280), 72 states have return successors, (279), 279 states have call predecessors, (279), 279 states have call successors, (279) [2023-11-21 19:04:24,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1354 transitions. [2023-11-21 19:04:24,321 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1354 transitions. Word has length 158 [2023-11-21 19:04:24,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:04:24,322 INFO L495 AbstractCegarLoop]: Abstraction has 946 states and 1354 transitions. [2023-11-21 19:04:24,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-11-21 19:04:24,323 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1354 transitions. [2023-11-21 19:04:24,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-11-21 19:04:24,330 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:04:24,331 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:04:24,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 19:04:24,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:04:24,551 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:04:24,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:04:24,551 INFO L85 PathProgramCache]: Analyzing trace with hash 66353013, now seen corresponding path program 1 times [2023-11-21 19:04:24,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:04:24,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166272181] [2023-11-21 19:04:24,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:04:24,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:04:24,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:04:25,309 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-21 19:04:25,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:04:25,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166272181] [2023-11-21 19:04:25,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166272181] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:04:25,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868083880] [2023-11-21 19:04:25,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:04:25,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:04:25,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:04:25,312 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:04:25,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_782c0d68-3d4e-490f-8c10-dd830fdd6404/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 19:04:26,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:04:26,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 2566 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 19:04:26,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:04:26,660 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-21 19:04:26,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:04:26,971 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-21 19:04:26,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868083880] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:04:26,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [266652984] [2023-11-21 19:04:27,002 INFO L159 IcfgInterpreter]: Started Sifa with 139 locations of interest [2023-11-21 19:04:27,003 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:04:27,007 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:04:27,013 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:04:27,014 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs