./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--pg.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E/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--pg.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E --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 86380eb8807c8834472c3c5bc5f358e156df083f7e4b141cf7faa18b94c9fafb --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:15:07,786 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:15:07,866 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-64bit-Taipan_Default.epf [2024-11-14 03:15:07,870 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:15:07,870 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:15:07,900 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:15:07,900 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:15:07,901 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:15:07,901 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:15:07,901 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:15:07,901 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:15:07,901 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:15:07,901 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:15:07,901 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:15:07,902 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:15:07,902 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:15:07,902 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:15:07,902 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:15:07,902 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:15:07,902 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:15:07,902 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:15:07,902 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:15:07,903 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:15:07,903 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:15:07,903 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:15:07,903 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:15:07,903 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:15:07,903 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:15:07,903 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:15:07,905 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:15:07,905 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:15:07,905 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:15:07,905 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:15:07,905 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:15:07,906 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:15:07,906 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:15:07,906 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:15:07,906 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:15:07,906 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:15:07,907 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:15:07,907 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:15:07,907 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:15:07,907 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:15:07,907 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:15:07,907 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E 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 -> 86380eb8807c8834472c3c5bc5f358e156df083f7e4b141cf7faa18b94c9fafb [2024-11-14 03:15:08,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:15:08,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:15:08,247 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:15:08,248 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:15:08,248 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:15:08,250 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--block--paride--pg.ko-entry_point.cil.out.i Unable to find full path for "g++" [2024-11-14 03:15:10,114 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:15:10,641 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:15:10,642 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--block--paride--pg.ko-entry_point.cil.out.i [2024-11-14 03:15:10,688 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E/data/dce5cf704/efacb3aef0dc49fd8e9c22e7b63dc974/FLAG5299700eb [2024-11-14 03:15:11,173 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E/data/dce5cf704/efacb3aef0dc49fd8e9c22e7b63dc974 [2024-11-14 03:15:11,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:15:11,177 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:15:11,179 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:15:11,179 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:15:11,183 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:15:11,184 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:15:11" (1/1) ... [2024-11-14 03:15:11,185 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6be07d22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:11, skipping insertion in model container [2024-11-14 03:15:11,185 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:15:11" (1/1) ... [2024-11-14 03:15:11,259 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:15:11,645 WARN L1355 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3070] [2024-11-14 03:15:11,645 WARN L1355 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3071-3072] [2024-11-14 03:15:11,762 WARN L250 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_1c6f67ca-522d-48d1-b388-909146344c92/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--block--paride--pg.ko-entry_point.cil.out.i[91143,91156] [2024-11-14 03:15:12,033 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:15:12,084 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:15:12,238 WARN L1355 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3070] [2024-11-14 03:15:12,239 WARN L1355 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3071-3072] [2024-11-14 03:15:12,242 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; btr %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr)); [3152] [2024-11-14 03:15:12,244 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; bts %2, %0; setc %1": "+m" (*addr), "=qm" (c): "Ir" (nr): "memory"); [3160-3161] [2024-11-14 03:15:12,255 WARN L250 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_1c6f67ca-522d-48d1-b388-909146344c92/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--block--paride--pg.ko-entry_point.cil.out.i[91143,91156] [2024-11-14 03:15:12,390 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:15:12,469 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:15:12,470 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:12 WrapperNode [2024-11-14 03:15:12,470 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:15:12,473 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:15:12,473 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:15:12,473 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:15:12,481 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:12" (1/1) ... [2024-11-14 03:15:12,540 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:12" (1/1) ... [2024-11-14 03:15:12,646 INFO L138 Inliner]: procedures = 113, calls = 1214, calls flagged for inlining = 42, calls inlined = 40, statements flattened = 1979 [2024-11-14 03:15:12,647 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:15:12,647 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:15:12,647 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:15:12,647 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:15:12,655 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:12" (1/1) ... [2024-11-14 03:15:12,655 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:12" (1/1) ... [2024-11-14 03:15:12,686 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:12" (1/1) ... [2024-11-14 03:15:12,686 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:12" (1/1) ... [2024-11-14 03:15:12,797 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:12" (1/1) ... [2024-11-14 03:15:12,812 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:12" (1/1) ... [2024-11-14 03:15:12,827 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:12" (1/1) ... [2024-11-14 03:15:12,842 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:12" (1/1) ... [2024-11-14 03:15:12,865 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:15:12,869 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:15:12,869 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:15:12,870 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:15:12,871 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:12" (1/1) ... [2024-11-14 03:15:12,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:15:12,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:12,904 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:15:12,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:15:12,937 INFO L130 BoogieDeclarations]: Found specification of procedure pi_release [2024-11-14 03:15:12,937 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_release [2024-11-14 03:15:12,938 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2024-11-14 03:15:12,938 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2024-11-14 03:15:12,938 INFO L130 BoogieDeclarations]: Found specification of procedure pi_disconnect [2024-11-14 03:15:12,938 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_disconnect [2024-11-14 03:15:12,938 INFO L130 BoogieDeclarations]: Found specification of procedure status_reg [2024-11-14 03:15:12,938 INFO L138 BoogieDeclarations]: Found implementation of procedure status_reg [2024-11-14 03:15:12,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2024-11-14 03:15:12,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2024-11-14 03:15:12,938 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2024-11-14 03:15:12,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2024-11-14 03:15:12,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 03:15:12,939 INFO L130 BoogieDeclarations]: Found specification of procedure read_reg [2024-11-14 03:15:12,939 INFO L138 BoogieDeclarations]: Found implementation of procedure read_reg [2024-11-14 03:15:12,939 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2024-11-14 03:15:12,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2024-11-14 03:15:12,940 INFO L130 BoogieDeclarations]: Found specification of procedure pg_sleep [2024-11-14 03:15:12,940 INFO L138 BoogieDeclarations]: Found implementation of procedure pg_sleep [2024-11-14 03:15:12,940 INFO L130 BoogieDeclarations]: Found specification of procedure pg_completion [2024-11-14 03:15:12,940 INFO L138 BoogieDeclarations]: Found implementation of procedure pg_completion [2024-11-14 03:15:12,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 03:15:12,940 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2024-11-14 03:15:12,940 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2024-11-14 03:15:12,941 INFO L130 BoogieDeclarations]: Found specification of procedure pg_wait [2024-11-14 03:15:12,941 INFO L138 BoogieDeclarations]: Found implementation of procedure pg_wait [2024-11-14 03:15:12,941 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2024-11-14 03:15:12,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2024-11-14 03:15:12,942 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2024-11-14 03:15:12,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2024-11-14 03:15:12,942 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2024-11-14 03:15:12,942 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2024-11-14 03:15:12,942 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-14 03:15:12,942 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-14 03:15:12,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-14 03:15:12,944 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2024-11-14 03:15:12,944 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2024-11-14 03:15:12,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:15:12,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 03:15:12,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-14 03:15:12,945 INFO L130 BoogieDeclarations]: Found specification of procedure DRIVE [2024-11-14 03:15:12,945 INFO L138 BoogieDeclarations]: Found implementation of procedure DRIVE [2024-11-14 03:15:12,945 INFO L130 BoogieDeclarations]: Found specification of procedure pg_write [2024-11-14 03:15:12,945 INFO L138 BoogieDeclarations]: Found implementation of procedure pg_write [2024-11-14 03:15:12,945 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2024-11-14 03:15:12,945 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2024-11-14 03:15:12,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-14 03:15:12,945 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_20 [2024-11-14 03:15:12,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_20 [2024-11-14 03:15:12,945 INFO L130 BoogieDeclarations]: Found specification of procedure pg_reset [2024-11-14 03:15:12,945 INFO L138 BoogieDeclarations]: Found implementation of procedure pg_reset [2024-11-14 03:15:12,945 INFO L130 BoogieDeclarations]: Found specification of procedure pg_identify [2024-11-14 03:15:12,945 INFO L138 BoogieDeclarations]: Found implementation of procedure pg_identify [2024-11-14 03:15:12,945 INFO L130 BoogieDeclarations]: Found specification of procedure pi_write_block [2024-11-14 03:15:12,945 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_write_block [2024-11-14 03:15:12,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 03:15:12,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2024-11-14 03:15:12,945 INFO L130 BoogieDeclarations]: Found specification of procedure pi_init [2024-11-14 03:15:12,946 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_init [2024-11-14 03:15:12,946 INFO L130 BoogieDeclarations]: Found specification of procedure pi_read_regr [2024-11-14 03:15:12,946 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_read_regr [2024-11-14 03:15:12,946 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2024-11-14 03:15:12,946 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2024-11-14 03:15:12,946 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2024-11-14 03:15:12,946 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2024-11-14 03:15:12,946 INFO L130 BoogieDeclarations]: Found specification of procedure pg_probe [2024-11-14 03:15:12,946 INFO L138 BoogieDeclarations]: Found implementation of procedure pg_probe [2024-11-14 03:15:12,946 INFO L130 BoogieDeclarations]: Found specification of procedure pi_connect [2024-11-14 03:15:12,946 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_connect [2024-11-14 03:15:12,946 INFO L130 BoogieDeclarations]: Found specification of procedure pg_command [2024-11-14 03:15:12,946 INFO L138 BoogieDeclarations]: Found implementation of procedure pg_command [2024-11-14 03:15:12,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:15:12,946 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2024-11-14 03:15:12,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2024-11-14 03:15:12,946 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2024-11-14 03:15:12,946 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2024-11-14 03:15:12,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:15:12,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:15:12,947 INFO L130 BoogieDeclarations]: Found specification of procedure xs [2024-11-14 03:15:12,947 INFO L138 BoogieDeclarations]: Found implementation of procedure xs [2024-11-14 03:15:12,947 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2024-11-14 03:15:12,947 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2024-11-14 03:15:13,331 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:15:13,334 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:15:13,903 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2024-11-14 03:15:18,515 INFO L? ?]: Removed 572 outVars from TransFormulas that were not future-live. [2024-11-14 03:15:18,515 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:15:19,127 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:15:19,132 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-14 03:15:19,132 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:15:19 BoogieIcfgContainer [2024-11-14 03:15:19,132 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:15:19,134 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:15:19,137 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:15:19,142 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:15:19,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:15:11" (1/3) ... [2024-11-14 03:15:19,143 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ffd1523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:15:19, skipping insertion in model container [2024-11-14 03:15:19,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:15:12" (2/3) ... [2024-11-14 03:15:19,145 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ffd1523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:15:19, skipping insertion in model container [2024-11-14 03:15:19,145 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:15:19" (3/3) ... [2024-11-14 03:15:19,146 INFO L112 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--block--paride--pg.ko-entry_point.cil.out.i [2024-11-14 03:15:19,165 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:15:19,167 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--block--paride--pg.ko-entry_point.cil.out.i that has 35 procedures, 413 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-14 03:15:19,235 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:15:19,248 INFO L333 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, 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;@b24a2f4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:15:19,248 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 03:15:19,253 INFO L276 IsEmpty]: Start isEmpty. Operand has 412 states, 264 states have (on average 1.375) internal successors, (363), 272 states have internal predecessors, (363), 113 states have call successors, (113), 34 states have call predecessors, (113), 33 states have return successors, (110), 110 states have call predecessors, (110), 110 states have call successors, (110) [2024-11-14 03:15:19,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-14 03:15:19,274 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:19,275 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:19,275 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:19,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:19,280 INFO L85 PathProgramCache]: Analyzing trace with hash 2094534696, now seen corresponding path program 1 times [2024-11-14 03:15:19,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:19,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850771491] [2024-11-14 03:15:19,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:19,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 03:15:21,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:21,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850771491] [2024-11-14 03:15:21,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850771491] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:15:21,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:15:21,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:15:21,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879557819] [2024-11-14 03:15:21,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:15:21,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:15:21,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:21,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:15:21,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:15:21,231 INFO L87 Difference]: Start difference. First operand has 412 states, 264 states have (on average 1.375) internal successors, (363), 272 states have internal predecessors, (363), 113 states have call successors, (113), 34 states have call predecessors, (113), 33 states have return successors, (110), 110 states have call predecessors, (110), 110 states have call successors, (110) Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-14 03:15:23,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:15:23,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:23,976 INFO L93 Difference]: Finished difference Result 1067 states and 1506 transitions. [2024-11-14 03:15:23,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:15:23,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 84 [2024-11-14 03:15:23,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:23,991 INFO L225 Difference]: With dead ends: 1067 [2024-11-14 03:15:23,992 INFO L226 Difference]: Without dead ends: 642 [2024-11-14 03:15:23,998 INFO L431 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 [2024-11-14 03:15:24,005 INFO L432 NwaCegarLoop]: 565 mSDtfsCounter, 364 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:24,007 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 1043 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 163 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2024-11-14 03:15:24,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2024-11-14 03:15:24,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 642. [2024-11-14 03:15:24,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 410 states have (on average 1.329268292682927) internal successors, (545), 415 states have internal predecessors, (545), 175 states have call successors, (175), 57 states have call predecessors, (175), 56 states have return successors, (174), 174 states have call predecessors, (174), 174 states have call successors, (174) [2024-11-14 03:15:24,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 894 transitions. [2024-11-14 03:15:24,158 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 894 transitions. Word has length 84 [2024-11-14 03:15:24,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:24,159 INFO L471 AbstractCegarLoop]: Abstraction has 642 states and 894 transitions. [2024-11-14 03:15:24,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-14 03:15:24,160 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 894 transitions. [2024-11-14 03:15:24,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-11-14 03:15:24,176 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:24,179 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2024-11-14 03:15:24,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:15:24,180 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:24,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:24,180 INFO L85 PathProgramCache]: Analyzing trace with hash -143397384, now seen corresponding path program 1 times [2024-11-14 03:15:24,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:24,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806116190] [2024-11-14 03:15:24,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:24,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:25,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:25,701 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-14 03:15:25,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:25,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806116190] [2024-11-14 03:15:25,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806116190] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:15:25,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:15:25,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:15:25,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986210768] [2024-11-14 03:15:25,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:15:25,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:15:25,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:25,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:15:25,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:15:25,707 INFO L87 Difference]: Start difference. First operand 642 states and 894 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2024-11-14 03:15:27,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:15:29,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:15:30,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:30,179 INFO L93 Difference]: Finished difference Result 1267 states and 1772 transitions. [2024-11-14 03:15:30,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:15:30,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 122 [2024-11-14 03:15:30,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:30,186 INFO L225 Difference]: With dead ends: 1267 [2024-11-14 03:15:30,186 INFO L226 Difference]: Without dead ends: 650 [2024-11-14 03:15:30,189 INFO L431 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 [2024-11-14 03:15:30,189 INFO L432 NwaCegarLoop]: 493 mSDtfsCounter, 3 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:30,190 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 985 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2024-11-14 03:15:30,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2024-11-14 03:15:30,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 644. [2024-11-14 03:15:30,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 412 states have (on average 1.3276699029126213) internal successors, (547), 417 states have internal predecessors, (547), 175 states have call successors, (175), 57 states have call predecessors, (175), 56 states have return successors, (174), 174 states have call predecessors, (174), 174 states have call successors, (174) [2024-11-14 03:15:30,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 896 transitions. [2024-11-14 03:15:30,237 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 896 transitions. Word has length 122 [2024-11-14 03:15:30,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:30,237 INFO L471 AbstractCegarLoop]: Abstraction has 644 states and 896 transitions. [2024-11-14 03:15:30,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2024-11-14 03:15:30,238 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 896 transitions. [2024-11-14 03:15:30,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-14 03:15:30,242 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:30,242 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2024-11-14 03:15:30,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 03:15:30,243 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:30,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:30,243 INFO L85 PathProgramCache]: Analyzing trace with hash 2143772355, now seen corresponding path program 1 times [2024-11-14 03:15:30,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:30,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287858252] [2024-11-14 03:15:30,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:30,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:31,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:31,582 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-14 03:15:31,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:31,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287858252] [2024-11-14 03:15:31,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287858252] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:31,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918794382] [2024-11-14 03:15:31,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:31,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:31,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:31,588 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:31,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:15:33,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:33,231 INFO L255 TraceCheckSpWp]: Trace formula consists of 3222 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:15:33,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-14 03:15:33,287 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:15:33,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918794382] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:15:33,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:15:33,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-14 03:15:33,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111160804] [2024-11-14 03:15:33,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:15:33,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:15:33,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:33,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:15:33,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:15:33,289 INFO L87 Difference]: Start difference. First operand 644 states and 896 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-14 03:15:35,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:15:37,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:15:37,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:37,727 INFO L93 Difference]: Finished difference Result 1285 states and 1798 transitions. [2024-11-14 03:15:37,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:15:37,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 128 [2024-11-14 03:15:37,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:37,733 INFO L225 Difference]: With dead ends: 1285 [2024-11-14 03:15:37,733 INFO L226 Difference]: Without dead ends: 666 [2024-11-14 03:15:37,736 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:15:37,736 INFO L432 NwaCegarLoop]: 499 mSDtfsCounter, 10 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:37,737 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 989 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2024-11-14 03:15:37,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2024-11-14 03:15:37,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 646. [2024-11-14 03:15:37,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 414 states have (on average 1.326086956521739) internal successors, (549), 419 states have internal predecessors, (549), 175 states have call successors, (175), 57 states have call predecessors, (175), 56 states have return successors, (174), 174 states have call predecessors, (174), 174 states have call successors, (174) [2024-11-14 03:15:37,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 898 transitions. [2024-11-14 03:15:37,816 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 898 transitions. Word has length 128 [2024-11-14 03:15:37,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:37,817 INFO L471 AbstractCegarLoop]: Abstraction has 646 states and 898 transitions. [2024-11-14 03:15:37,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-14 03:15:37,818 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 898 transitions. [2024-11-14 03:15:37,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-11-14 03:15:37,825 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:37,825 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2024-11-14 03:15:37,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:15:38,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:38,026 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:38,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:38,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1960569207, now seen corresponding path program 1 times [2024-11-14 03:15:38,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:38,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768720074] [2024-11-14 03:15:38,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:38,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:39,168 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-14 03:15:39,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:39,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768720074] [2024-11-14 03:15:39,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768720074] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:39,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480507291] [2024-11-14 03:15:39,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:39,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:39,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:39,173 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:39,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:15:40,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:40,818 INFO L255 TraceCheckSpWp]: Trace formula consists of 3264 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 03:15:40,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-14 03:15:40,855 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:15:40,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480507291] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:15:40,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:15:40,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-14 03:15:40,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694666419] [2024-11-14 03:15:40,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:15:40,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:15:40,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:40,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:15:40,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:15:40,861 INFO L87 Difference]: Start difference. First operand 646 states and 898 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2024-11-14 03:15:42,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:15:44,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:15:45,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:45,232 INFO L93 Difference]: Finished difference Result 1277 states and 1782 transitions. [2024-11-14 03:15:45,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:15:45,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 132 [2024-11-14 03:15:45,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:45,238 INFO L225 Difference]: With dead ends: 1277 [2024-11-14 03:15:45,238 INFO L226 Difference]: Without dead ends: 656 [2024-11-14 03:15:45,241 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:15:45,242 INFO L432 NwaCegarLoop]: 492 mSDtfsCounter, 8 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:45,245 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 978 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 142 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2024-11-14 03:15:45,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2024-11-14 03:15:45,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 648. [2024-11-14 03:15:45,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 416 states have (on average 1.3245192307692308) internal successors, (551), 421 states have internal predecessors, (551), 175 states have call successors, (175), 57 states have call predecessors, (175), 56 states have return successors, (174), 174 states have call predecessors, (174), 174 states have call successors, (174) [2024-11-14 03:15:45,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 900 transitions. [2024-11-14 03:15:45,301 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 900 transitions. Word has length 132 [2024-11-14 03:15:45,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:45,302 INFO L471 AbstractCegarLoop]: Abstraction has 648 states and 900 transitions. [2024-11-14 03:15:45,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2024-11-14 03:15:45,302 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 900 transitions. [2024-11-14 03:15:45,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-11-14 03:15:45,306 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:45,306 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2024-11-14 03:15:45,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 03:15:45,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:45,507 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:45,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:45,507 INFO L85 PathProgramCache]: Analyzing trace with hash 164266870, now seen corresponding path program 1 times [2024-11-14 03:15:45,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:45,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435145196] [2024-11-14 03:15:45,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:45,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:46,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-14 03:15:46,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:46,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435145196] [2024-11-14 03:15:46,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435145196] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:46,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247765383] [2024-11-14 03:15:46,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:46,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:46,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:46,441 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:46,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:15:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:47,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 3275 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 03:15:47,789 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:47,829 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-14 03:15:47,829 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:15:47,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247765383] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:15:47,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:15:47,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-14 03:15:47,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050369356] [2024-11-14 03:15:47,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:15:47,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:15:47,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:15:47,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:15:47,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:15:47,832 INFO L87 Difference]: Start difference. First operand 648 states and 900 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2024-11-14 03:15:49,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:15:51,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:15:52,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:15:52,240 INFO L93 Difference]: Finished difference Result 1295 states and 1810 transitions. [2024-11-14 03:15:52,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:15:52,240 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), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 135 [2024-11-14 03:15:52,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:15:52,245 INFO L225 Difference]: With dead ends: 1295 [2024-11-14 03:15:52,245 INFO L226 Difference]: Without dead ends: 672 [2024-11-14 03:15:52,248 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:15:52,249 INFO L432 NwaCegarLoop]: 490 mSDtfsCounter, 16 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:15:52,249 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 966 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 142 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2024-11-14 03:15:52,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2024-11-14 03:15:52,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 672. [2024-11-14 03:15:52,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 434 states have (on average 1.3294930875576036) internal successors, (577), 439 states have internal predecessors, (577), 181 states have call successors, (181), 57 states have call predecessors, (181), 56 states have return successors, (180), 180 states have call predecessors, (180), 180 states have call successors, (180) [2024-11-14 03:15:52,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 938 transitions. [2024-11-14 03:15:52,282 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 938 transitions. Word has length 135 [2024-11-14 03:15:52,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:15:52,282 INFO L471 AbstractCegarLoop]: Abstraction has 672 states and 938 transitions. [2024-11-14 03:15:52,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2024-11-14 03:15:52,282 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 938 transitions. [2024-11-14 03:15:52,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-14 03:15:52,286 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:15:52,286 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:15:52,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 03:15:52,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:52,487 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:15:52,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:15:52,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1850051331, now seen corresponding path program 1 times [2024-11-14 03:15:52,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:15:52,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544014670] [2024-11-14 03:15:52,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:52,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:15:53,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-11-14 03:15:53,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:15:53,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544014670] [2024-11-14 03:15:53,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544014670] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:15:53,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955946337] [2024-11-14 03:15:53,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:15:53,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:15:53,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:15:53,594 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:15:53,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c6f67ca-522d-48d1-b388-909146344c92/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:15:55,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:15:55,033 INFO L255 TraceCheckSpWp]: Trace formula consists of 3292 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 03:15:55,037 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:15:55,090 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-11-14 03:15:55,093 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:15:55,378 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-11-14 03:15:55,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955946337] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:15:55,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1849255432] [2024-11-14 03:15:55,413 INFO L159 IcfgInterpreter]: Started Sifa with 112 locations of interest [2024-11-14 03:15:55,413 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:15:55,418 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:15:55,423 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:15:55,423 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs