./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 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/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_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 0e5349f2aac0388d197fa32950f3e69d3339933dee46585f91772f9bda921aa4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:36:48,117 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:36:48,269 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 20:36:48,281 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:36:48,288 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:36:48,327 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:36:48,328 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:36:48,329 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:36:48,331 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:36:48,337 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:36:48,338 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:36:48,339 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:36:48,340 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:36:48,342 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:36:48,343 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:36:48,343 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:36:48,344 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:36:48,344 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:36:48,345 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:36:48,346 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:36:48,346 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:36:48,347 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:36:48,348 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:36:48,349 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:36:48,350 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:36:48,350 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:36:48,351 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:36:48,351 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:36:48,352 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:36:48,352 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:36:48,353 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:36:48,353 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:36:48,353 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:36:48,354 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:36:48,354 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:48,354 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:36:48,355 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:36:48,356 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:36:48,356 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:36:48,356 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:36:48,356 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:36:48,357 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:36:48,357 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:36:48,358 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:36:48,358 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_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e5349f2aac0388d197fa32950f3e69d3339933dee46585f91772f9bda921aa4 [2023-11-23 20:36:48,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:36:48,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:36:48,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:36:48,778 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:36:48,778 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:36:48,780 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/../../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 [2023-11-23 20:36:52,110 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:36:52,701 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:36:52,701 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/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 [2023-11-23 20:36:52,749 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/data/ebe5ed7f4/8b5ca353c0f54cfcaafcc06d1835fb5d/FLAGbbbef541f [2023-11-23 20:36:52,771 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/data/ebe5ed7f4/8b5ca353c0f54cfcaafcc06d1835fb5d [2023-11-23 20:36:52,778 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:36:52,780 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:36:52,786 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:52,786 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:36:52,793 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:36:52,797 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:52" (1/1) ... [2023-11-23 20:36:52,799 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bc2a71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:52, skipping insertion in model container [2023-11-23 20:36:52,799 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:52" (1/1) ... [2023-11-23 20:36:52,926 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:36:53,432 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3059] [2023-11-23 20:36:53,432 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] [2023-11-23 20:36:53,632 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_eb661397-f2c9-411c-8f54-13ad764a8ef0/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] [2023-11-23 20:36:54,302 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:54,350 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:36:54,542 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3059] [2023-11-23 20:36:54,543 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] [2023-11-23 20:36:54,548 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] [2023-11-23 20:36:54,550 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] [2023-11-23 20:36:54,557 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_eb661397-f2c9-411c-8f54-13ad764a8ef0/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] [2023-11-23 20:36:54,752 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:54,804 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:36:54,804 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54 WrapperNode [2023-11-23 20:36:54,805 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:54,806 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:36:54,806 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:36:54,806 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:36:54,814 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:54,882 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:55,032 INFO L138 Inliner]: procedures = 119, calls = 789, calls flagged for inlining = 38, calls inlined = 36, statements flattened = 1734 [2023-11-23 20:36:55,033 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:36:55,034 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:36:55,034 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:36:55,034 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:36:55,046 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:55,046 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:55,067 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:55,074 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:55,181 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:55,226 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:55,250 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:55,266 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:55,294 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:36:55,306 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:36:55,306 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:36:55,306 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:36:55,307 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:55,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:55,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:55,342 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:36:55,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:36:55,378 INFO L130 BoogieDeclarations]: Found specification of procedure pi_release [2023-11-23 20:36:55,378 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_release [2023-11-23 20:36:55,379 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2023-11-23 20:36:55,379 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2023-11-23 20:36:55,379 INFO L130 BoogieDeclarations]: Found specification of procedure pi_disconnect [2023-11-23 20:36:55,379 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_disconnect [2023-11-23 20:36:55,379 INFO L130 BoogieDeclarations]: Found specification of procedure status_reg [2023-11-23 20:36:55,380 INFO L138 BoogieDeclarations]: Found implementation of procedure status_reg [2023-11-23 20:36:55,380 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 20:36:55,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 20:36:55,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:36:55,380 INFO L130 BoogieDeclarations]: Found specification of procedure pi_read_block [2023-11-23 20:36:55,381 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_read_block [2023-11-23 20:36:55,381 INFO L130 BoogieDeclarations]: Found specification of procedure read_reg [2023-11-23 20:36:55,381 INFO L138 BoogieDeclarations]: Found implementation of procedure read_reg [2023-11-23 20:36:55,381 INFO L130 BoogieDeclarations]: Found specification of procedure pt_media_access_cmd [2023-11-23 20:36:55,381 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_media_access_cmd [2023-11-23 20:36:55,382 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 20:36:55,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 20:36:55,382 INFO L130 BoogieDeclarations]: Found specification of procedure pt_reset [2023-11-23 20:36:55,382 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_reset [2023-11-23 20:36:55,382 INFO L130 BoogieDeclarations]: Found specification of procedure pt_identify [2023-11-23 20:36:55,382 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_identify [2023-11-23 20:36:55,383 INFO L130 BoogieDeclarations]: Found specification of procedure pt_command [2023-11-23 20:36:55,383 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_command [2023-11-23 20:36:55,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:36:55,383 INFO L130 BoogieDeclarations]: Found specification of procedure pt_write [2023-11-23 20:36:55,383 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_write [2023-11-23 20:36:55,383 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-23 20:36:55,384 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-23 20:36:55,384 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 20:36:55,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 20:36:55,384 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-23 20:36:55,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-23 20:36:55,385 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 20:36:55,385 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 20:36:55,385 INFO L130 BoogieDeclarations]: Found specification of procedure pt_atapi [2023-11-23 20:36:55,385 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_atapi [2023-11-23 20:36:55,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:36:55,385 INFO L130 BoogieDeclarations]: Found specification of procedure pt_poll_dsc [2023-11-23 20:36:55,386 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_poll_dsc [2023-11-23 20:36:55,386 INFO L130 BoogieDeclarations]: Found specification of procedure pt_req_sense [2023-11-23 20:36:55,386 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_req_sense [2023-11-23 20:36:55,386 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2023-11-23 20:36:55,386 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2023-11-23 20:36:55,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:36:55,387 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2023-11-23 20:36:55,387 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2023-11-23 20:36:55,387 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2023-11-23 20:36:55,387 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2023-11-23 20:36:55,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 20:36:55,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:36:55,388 INFO L130 BoogieDeclarations]: Found specification of procedure DRIVE [2023-11-23 20:36:55,388 INFO L138 BoogieDeclarations]: Found implementation of procedure DRIVE [2023-11-23 20:36:55,388 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2023-11-23 20:36:55,388 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2023-11-23 20:36:55,388 INFO L130 BoogieDeclarations]: Found specification of procedure pt_completion [2023-11-23 20:36:55,388 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_completion [2023-11-23 20:36:55,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 20:36:55,389 INFO L130 BoogieDeclarations]: Found specification of procedure pt_sleep [2023-11-23 20:36:55,389 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_sleep [2023-11-23 20:36:55,389 INFO L130 BoogieDeclarations]: Found specification of procedure pt_write_fm [2023-11-23 20:36:55,389 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_write_fm [2023-11-23 20:36:55,390 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_20 [2023-11-23 20:36:55,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_20 [2023-11-23 20:36:55,390 INFO L130 BoogieDeclarations]: Found specification of procedure iminor [2023-11-23 20:36:55,390 INFO L138 BoogieDeclarations]: Found implementation of procedure iminor [2023-11-23 20:36:55,390 INFO L130 BoogieDeclarations]: Found specification of procedure pi_write_block [2023-11-23 20:36:55,390 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_write_block [2023-11-23 20:36:55,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:36:55,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 20:36:55,391 INFO L130 BoogieDeclarations]: Found specification of procedure pi_init [2023-11-23 20:36:55,391 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_init [2023-11-23 20:36:55,391 INFO L130 BoogieDeclarations]: Found specification of procedure pi_read_regr [2023-11-23 20:36:55,391 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_read_regr [2023-11-23 20:36:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2023-11-23 20:36:55,392 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2023-11-23 20:36:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-23 20:36:55,392 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-23 20:36:55,392 INFO L130 BoogieDeclarations]: Found specification of procedure pt_wait [2023-11-23 20:36:55,392 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_wait [2023-11-23 20:36:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure pi_connect [2023-11-23 20:36:55,393 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_connect [2023-11-23 20:36:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure device_destroy [2023-11-23 20:36:55,393 INFO L138 BoogieDeclarations]: Found implementation of procedure device_destroy [2023-11-23 20:36:55,393 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2023-11-23 20:36:55,393 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2023-11-23 20:36:55,394 INFO L130 BoogieDeclarations]: Found specification of procedure pt_probe [2023-11-23 20:36:55,394 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_probe [2023-11-23 20:36:55,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:36:55,394 INFO L130 BoogieDeclarations]: Found specification of procedure pt_rewind [2023-11-23 20:36:55,394 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_rewind [2023-11-23 20:36:55,394 INFO L130 BoogieDeclarations]: Found specification of procedure device_create [2023-11-23 20:36:55,395 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create [2023-11-23 20:36:55,395 INFO L130 BoogieDeclarations]: Found specification of procedure xn [2023-11-23 20:36:55,395 INFO L138 BoogieDeclarations]: Found implementation of procedure xn [2023-11-23 20:36:55,395 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-23 20:36:55,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-23 20:36:55,395 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2023-11-23 20:36:55,396 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2023-11-23 20:36:55,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:36:55,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:36:55,396 INFO L130 BoogieDeclarations]: Found specification of procedure xs [2023-11-23 20:36:55,396 INFO L138 BoogieDeclarations]: Found implementation of procedure xs [2023-11-23 20:36:55,397 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-11-23 20:36:55,397 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-11-23 20:36:55,830 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:36:55,833 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:36:55,954 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 20:37:02,998 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:37:03,993 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:37:03,996 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-23 20:37:03,998 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:37:03 BoogieIcfgContainer [2023-11-23 20:37:03,998 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:37:04,001 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:37:04,002 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:37:04,005 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:37:04,005 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:36:52" (1/3) ... [2023-11-23 20:37:04,006 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a521504 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:37:04, skipping insertion in model container [2023-11-23 20:37:04,006 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (2/3) ... [2023-11-23 20:37:04,008 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a521504 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:37:04, skipping insertion in model container [2023-11-23 20:37:04,009 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:37:03" (3/3) ... [2023-11-23 20:37:04,010 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 [2023-11-23 20:37:04,030 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:37:04,031 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:37:04,117 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:37:04,128 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;@5a021fb1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:37:04,129 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:37:04,139 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) [2023-11-23 20:37:04,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-23 20:37:04,180 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:04,181 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] [2023-11-23 20:37:04,181 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:04,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:04,187 INFO L85 PathProgramCache]: Analyzing trace with hash -544458961, now seen corresponding path program 1 times [2023-11-23 20:37:04,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:04,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684533721] [2023-11-23 20:37:04,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:04,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:04,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-23 20:37:05,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:05,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684533721] [2023-11-23 20:37:05,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684533721] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:05,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:05,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:05,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392943398] [2023-11-23 20:37:05,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:05,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:05,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:05,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:05,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:05,421 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) [2023-11-23 20:37:08,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:08,012 INFO L93 Difference]: Finished difference Result 1547 states and 2270 transitions. [2023-11-23 20:37:08,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:08,015 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 [2023-11-23 20:37:08,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:08,036 INFO L225 Difference]: With dead ends: 1547 [2023-11-23 20:37:08,037 INFO L226 Difference]: Without dead ends: 886 [2023-11-23 20:37:08,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:08,053 INFO L413 NwaCegarLoop]: 978 mSDtfsCounter, 440 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s 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, 2.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:08,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 1727 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-23 20:37:08,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2023-11-23 20:37:08,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 886. [2023-11-23 20:37:08,231 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) [2023-11-23 20:37:08,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1260 transitions. [2023-11-23 20:37:08,248 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1260 transitions. Word has length 105 [2023-11-23 20:37:08,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:08,250 INFO L495 AbstractCegarLoop]: Abstraction has 886 states and 1260 transitions. [2023-11-23 20:37:08,250 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) [2023-11-23 20:37:08,250 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1260 transitions. [2023-11-23 20:37:08,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-11-23 20:37:08,265 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:08,266 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] [2023-11-23 20:37:08,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:37:08,266 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:08,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:08,267 INFO L85 PathProgramCache]: Analyzing trace with hash 21302686, now seen corresponding path program 1 times [2023-11-23 20:37:08,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:08,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202777080] [2023-11-23 20:37:08,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:08,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:09,258 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-23 20:37:09,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:09,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202777080] [2023-11-23 20:37:09,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202777080] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:09,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:09,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:09,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112040470] [2023-11-23 20:37:09,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:09,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:09,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:09,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:09,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:09,264 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) [2023-11-23 20:37:11,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:11,151 INFO L93 Difference]: Finished difference Result 1771 states and 2530 transitions. [2023-11-23 20:37:11,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:11,152 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 [2023-11-23 20:37:11,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:11,161 INFO L225 Difference]: With dead ends: 1771 [2023-11-23 20:37:11,161 INFO L226 Difference]: Without dead ends: 910 [2023-11-23 20:37:11,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:11,168 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 [2023-11-23 20:37:11,168 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] [2023-11-23 20:37:11,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2023-11-23 20:37:11,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 888. [2023-11-23 20:37:11,217 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) [2023-11-23 20:37:11,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1262 transitions. [2023-11-23 20:37:11,227 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1262 transitions. Word has length 142 [2023-11-23 20:37:11,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:11,227 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1262 transitions. [2023-11-23 20:37:11,228 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) [2023-11-23 20:37:11,228 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1262 transitions. [2023-11-23 20:37:11,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-23 20:37:11,238 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:11,238 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] [2023-11-23 20:37:11,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:37:11,239 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:11,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:11,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1532947190, now seen corresponding path program 1 times [2023-11-23 20:37:11,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:11,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100101753] [2023-11-23 20:37:11,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:11,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:11,773 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-23 20:37:11,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:11,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100101753] [2023-11-23 20:37:11,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100101753] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:11,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:11,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:11,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728132743] [2023-11-23 20:37:11,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:11,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:11,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:11,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:11,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:11,777 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) [2023-11-23 20:37:13,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:13,566 INFO L93 Difference]: Finished difference Result 1769 states and 2524 transitions. [2023-11-23 20:37:13,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:13,567 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 [2023-11-23 20:37:13,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:13,575 INFO L225 Difference]: With dead ends: 1769 [2023-11-23 20:37:13,575 INFO L226 Difference]: Without dead ends: 906 [2023-11-23 20:37:13,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:13,581 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 [2023-11-23 20:37:13,582 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] [2023-11-23 20:37:13,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2023-11-23 20:37:13,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 898. [2023-11-23 20:37:13,626 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) [2023-11-23 20:37:13,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1278 transitions. [2023-11-23 20:37:13,636 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1278 transitions. Word has length 146 [2023-11-23 20:37:13,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:13,636 INFO L495 AbstractCegarLoop]: Abstraction has 898 states and 1278 transitions. [2023-11-23 20:37:13,637 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) [2023-11-23 20:37:13,637 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1278 transitions. [2023-11-23 20:37:13,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-23 20:37:13,643 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:13,643 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] [2023-11-23 20:37:13,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:37:13,644 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:13,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:13,645 INFO L85 PathProgramCache]: Analyzing trace with hash -276661501, now seen corresponding path program 1 times [2023-11-23 20:37:13,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:13,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614616434] [2023-11-23 20:37:13,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:13,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:14,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:14,415 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-23 20:37:14,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:14,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614616434] [2023-11-23 20:37:14,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614616434] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:37:14,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016903679] [2023-11-23 20:37:14,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:14,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:14,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:14,428 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:14,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:37:15,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:15,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 2144 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:37:15,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-23 20:37:15,654 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:15,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016903679] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:15,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:37:15,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-23 20:37:15,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166519020] [2023-11-23 20:37:15,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:15,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:15,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:15,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:15,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:37:15,658 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) [2023-11-23 20:37:17,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:17,613 INFO L93 Difference]: Finished difference Result 1783 states and 2545 transitions. [2023-11-23 20:37:17,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:17,614 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 [2023-11-23 20:37:17,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:17,622 INFO L225 Difference]: With dead ends: 1783 [2023-11-23 20:37:17,622 INFO L226 Difference]: Without dead ends: 910 [2023-11-23 20:37:17,627 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 [2023-11-23 20:37:17,629 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 [2023-11-23 20:37:17,629 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] [2023-11-23 20:37:17,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2023-11-23 20:37:17,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 900. [2023-11-23 20:37:17,678 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) [2023-11-23 20:37:17,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1280 transitions. [2023-11-23 20:37:17,688 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1280 transitions. Word has length 151 [2023-11-23 20:37:17,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:17,689 INFO L495 AbstractCegarLoop]: Abstraction has 900 states and 1280 transitions. [2023-11-23 20:37:17,690 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) [2023-11-23 20:37:17,690 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1280 transitions. [2023-11-23 20:37:17,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-11-23 20:37:17,697 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:17,698 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] [2023-11-23 20:37:17,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:17,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:17,912 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:17,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:17,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1831285170, now seen corresponding path program 1 times [2023-11-23 20:37:17,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:17,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091746293] [2023-11-23 20:37:17,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:17,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:18,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:18,611 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-23 20:37:18,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:18,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091746293] [2023-11-23 20:37:18,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091746293] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:37:18,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9691486] [2023-11-23 20:37:18,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:18,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:18,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:18,616 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:18,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:37:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:19,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 2151 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:37:19,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:19,839 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-23 20:37:19,839 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:19,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9691486] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:19,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:37:19,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-23 20:37:19,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839767262] [2023-11-23 20:37:19,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:19,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:19,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:19,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:19,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:37:19,843 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) [2023-11-23 20:37:21,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:21,516 INFO L93 Difference]: Finished difference Result 1821 states and 2606 transitions. [2023-11-23 20:37:21,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:21,517 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 [2023-11-23 20:37:21,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:21,525 INFO L225 Difference]: With dead ends: 1821 [2023-11-23 20:37:21,525 INFO L226 Difference]: Without dead ends: 946 [2023-11-23 20:37:21,530 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 [2023-11-23 20:37:21,531 INFO L413 NwaCegarLoop]: 764 mSDtfsCounter, 15 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s 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, 1.6s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:21,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1516 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-23 20:37:21,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2023-11-23 20:37:21,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 944. [2023-11-23 20:37:21,574 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) [2023-11-23 20:37:21,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1352 transitions. [2023-11-23 20:37:21,584 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1352 transitions. Word has length 154 [2023-11-23 20:37:21,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:21,584 INFO L495 AbstractCegarLoop]: Abstraction has 944 states and 1352 transitions. [2023-11-23 20:37:21,585 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) [2023-11-23 20:37:21,585 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1352 transitions. [2023-11-23 20:37:21,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-23 20:37:21,592 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:21,592 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] [2023-11-23 20:37:21,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-23 20:37:21,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:21,808 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:21,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:21,809 INFO L85 PathProgramCache]: Analyzing trace with hash -540365121, now seen corresponding path program 1 times [2023-11-23 20:37:21,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:21,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032288521] [2023-11-23 20:37:21,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:21,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:22,562 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-23 20:37:22,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:22,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032288521] [2023-11-23 20:37:22,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032288521] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:37:22,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205735349] [2023-11-23 20:37:22,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:22,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:22,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:22,564 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:22,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:37:23,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:23,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 2168 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:37:23,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:23,769 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-23 20:37:23,769 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:23,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205735349] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:23,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:37:23,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-23 20:37:23,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033213801] [2023-11-23 20:37:23,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:23,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:23,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:23,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:23,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:37:23,773 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) [2023-11-23 20:37:25,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:25,641 INFO L93 Difference]: Finished difference Result 1869 states and 2715 transitions. [2023-11-23 20:37:25,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:25,642 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 [2023-11-23 20:37:25,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:25,652 INFO L225 Difference]: With dead ends: 1869 [2023-11-23 20:37:25,652 INFO L226 Difference]: Without dead ends: 950 [2023-11-23 20:37:25,657 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 [2023-11-23 20:37:25,658 INFO L413 NwaCegarLoop]: 762 mSDtfsCounter, 2 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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 [2023-11-23 20:37:25,658 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] [2023-11-23 20:37:25,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2023-11-23 20:37:25,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 946. [2023-11-23 20:37:25,700 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) [2023-11-23 20:37:25,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1354 transitions. [2023-11-23 20:37:25,709 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1354 transitions. Word has length 158 [2023-11-23 20:37:25,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:25,710 INFO L495 AbstractCegarLoop]: Abstraction has 946 states and 1354 transitions. [2023-11-23 20:37:25,710 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) [2023-11-23 20:37:25,710 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1354 transitions. [2023-11-23 20:37:25,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-11-23 20:37:25,717 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:25,718 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] [2023-11-23 20:37:25,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:25,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:25,932 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:25,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:25,933 INFO L85 PathProgramCache]: Analyzing trace with hash 66353013, now seen corresponding path program 1 times [2023-11-23 20:37:25,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:25,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154186869] [2023-11-23 20:37:25,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:25,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-23 20:37:26,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:26,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154186869] [2023-11-23 20:37:26,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154186869] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:37:26,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720211995] [2023-11-23 20:37:26,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:26,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:26,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:37:26,704 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:37:26,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eb661397-f2c9-411c-8f54-13ad764a8ef0/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:37:27,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:27,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 2562 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:37:27,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:28,057 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-23 20:37:28,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:37:28,389 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-23 20:37:28,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720211995] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:37:28,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1512765104] [2023-11-23 20:37:28,419 INFO L159 IcfgInterpreter]: Started Sifa with 139 locations of interest [2023-11-23 20:37:28,420 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:37:28,425 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:37:28,431 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:37:28,431 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs