./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pg.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbf78e4-f052-4e7b-9291-f634d9a63e0c/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbf78e4-f052-4e7b-9291-f634d9a63e0c/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbf78e4-f052-4e7b-9291-f634d9a63e0c/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbf78e4-f052-4e7b-9291-f634d9a63e0c/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pg.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbf78e4-f052-4e7b-9291-f634d9a63e0c/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbf78e4-f052-4e7b-9291-f634d9a63e0c/bin/utaipan-verify-DbMuA5NWw2 --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 410663f06ff647e412b04b4e33dc5a0aa773139e9be33f59003b35b6e81927a8 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:27:36,478 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:27:36,541 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbf78e4-f052-4e7b-9291-f634d9a63e0c/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-64bit-Taipan_Default.epf [2024-11-02 12:27:36,545 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:27:36,545 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:27:36,571 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:27:36,572 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:27:36,572 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:27:36,573 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:27:36,573 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:27:36,573 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:27:36,574 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:27:36,574 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:27:36,574 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:27:36,575 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:27:36,575 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:27:36,575 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:27:36,576 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:27:36,576 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:27:36,576 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:27:36,577 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:27:36,582 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:27:36,582 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:27:36,583 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:27:36,583 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:27:36,583 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:27:36,583 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:27:36,584 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:27:36,584 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:27:36,584 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:27:36,585 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:27:36,585 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:27:36,589 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:27:36,590 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:27:36,590 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:27:36,590 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:27:36,591 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:27:36,591 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:27:36,591 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:27:36,592 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:27:36,592 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:27:36,593 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:27:36,593 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:27:36,593 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:27:36,593 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_2bbf78e4-f052-4e7b-9291-f634d9a63e0c/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbf78e4-f052-4e7b-9291-f634d9a63e0c/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 410663f06ff647e412b04b4e33dc5a0aa773139e9be33f59003b35b6e81927a8 [2024-11-02 12:27:36,855 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:27:36,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:27:36,886 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:27:36,888 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:27:36,888 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:27:36,889 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbf78e4-f052-4e7b-9291-f634d9a63e0c/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pg.ko-main.cil.out.i Unable to find full path for "g++" [2024-11-02 12:27:38,995 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:27:39,497 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:27:39,497 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbf78e4-f052-4e7b-9291-f634d9a63e0c/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pg.ko-main.cil.out.i [2024-11-02 12:27:39,527 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbf78e4-f052-4e7b-9291-f634d9a63e0c/bin/utaipan-verify-DbMuA5NWw2/data/3f22e93c8/0b60f4cdfb4349cf983f33ce750108bd/FLAG0fd6ab02a [2024-11-02 12:27:39,570 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbf78e4-f052-4e7b-9291-f634d9a63e0c/bin/utaipan-verify-DbMuA5NWw2/data/3f22e93c8/0b60f4cdfb4349cf983f33ce750108bd [2024-11-02 12:27:39,572 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:27:39,574 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:27:39,575 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:27:39,576 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:27:39,581 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:27:39,582 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:27:39" (1/1) ... [2024-11-02 12:27:39,583 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a4f8c69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:39, skipping insertion in model container [2024-11-02 12:27:39,583 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:27:39" (1/1) ... [2024-11-02 12:27:39,657 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:27:40,540 WARN L251 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_2bbf78e4-f052-4e7b-9291-f634d9a63e0c/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pg.ko-main.cil.out.i[108133,108146] [2024-11-02 12:27:40,622 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:27:40,667 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:27:40,778 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)); [2808] [2024-11-02 12:27:40,780 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,%1\n\tsbb %0,%0": "=r" (oldbit), "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [2815-2816] [2024-11-02 12:27:40,905 WARN L251 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_2bbf78e4-f052-4e7b-9291-f634d9a63e0c/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pg.ko-main.cil.out.i[108133,108146] [2024-11-02 12:27:40,930 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:27:41,024 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:27:41,025 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:41 WrapperNode [2024-11-02 12:27:41,025 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:27:41,027 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:27:41,027 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:27:41,027 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:27:41,035 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:41" (1/1) ... [2024-11-02 12:27:41,097 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:41" (1/1) ... [2024-11-02 12:27:41,210 INFO L138 Inliner]: procedures = 133, calls = 1232, calls flagged for inlining = 49, calls inlined = 41, statements flattened = 1968 [2024-11-02 12:27:41,210 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:27:41,211 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:27:41,211 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:27:41,211 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:27:41,221 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:41" (1/1) ... [2024-11-02 12:27:41,221 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:41" (1/1) ... [2024-11-02 12:27:41,243 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:41" (1/1) ... [2024-11-02 12:27:41,244 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:41" (1/1) ... [2024-11-02 12:27:41,402 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:41" (1/1) ... [2024-11-02 12:27:41,432 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:41" (1/1) ... [2024-11-02 12:27:41,456 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:41" (1/1) ... [2024-11-02 12:27:41,471 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:41" (1/1) ... [2024-11-02 12:27:41,498 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:27:41,499 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:27:41,499 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:27:41,500 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:27:41,500 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:41" (1/1) ... [2024-11-02 12:27:41,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:27:41,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbf78e4-f052-4e7b-9291-f634d9a63e0c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:27:41,585 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbf78e4-f052-4e7b-9291-f634d9a63e0c/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:27:41,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbf78e4-f052-4e7b-9291-f634d9a63e0c/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:27:41,627 INFO L130 BoogieDeclarations]: Found specification of procedure pi_release [2024-11-02 12:27:41,627 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_release [2024-11-02 12:27:41,627 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2024-11-02 12:27:41,627 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2024-11-02 12:27:41,629 INFO L130 BoogieDeclarations]: Found specification of procedure pi_disconnect [2024-11-02 12:27:41,630 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_disconnect [2024-11-02 12:27:41,630 INFO L130 BoogieDeclarations]: Found specification of procedure status_reg [2024-11-02 12:27:41,630 INFO L138 BoogieDeclarations]: Found implementation of procedure status_reg [2024-11-02 12:27:41,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2024-11-02 12:27:41,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2024-11-02 12:27:41,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 12:27:41,631 INFO L130 BoogieDeclarations]: Found specification of procedure read_reg [2024-11-02 12:27:41,631 INFO L138 BoogieDeclarations]: Found implementation of procedure read_reg [2024-11-02 12:27:41,631 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2024-11-02 12:27:41,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2024-11-02 12:27:41,631 INFO L130 BoogieDeclarations]: Found specification of procedure pg_sleep [2024-11-02 12:27:41,631 INFO L138 BoogieDeclarations]: Found implementation of procedure pg_sleep [2024-11-02 12:27:41,631 INFO L130 BoogieDeclarations]: Found specification of procedure pg_completion [2024-11-02 12:27:41,632 INFO L138 BoogieDeclarations]: Found implementation of procedure pg_completion [2024-11-02 12:27:41,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 12:27:41,632 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2024-11-02 12:27:41,632 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2024-11-02 12:27:41,632 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2024-11-02 12:27:41,632 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2024-11-02 12:27:41,632 INFO L130 BoogieDeclarations]: Found specification of procedure pg_wait [2024-11-02 12:27:41,632 INFO L138 BoogieDeclarations]: Found implementation of procedure pg_wait [2024-11-02 12:27:41,633 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2024-11-02 12:27:41,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2024-11-02 12:27:41,633 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2024-11-02 12:27:41,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2024-11-02 12:27:41,633 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2024-11-02 12:27:41,635 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2024-11-02 12:27:41,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-02 12:27:41,636 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2024-11-02 12:27:41,636 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2024-11-02 12:27:41,636 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2024-11-02 12:27:41,636 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2024-11-02 12:27:41,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:27:41,637 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_11 [2024-11-02 12:27:41,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_11 [2024-11-02 12:27:41,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 12:27:41,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-02 12:27:41,638 INFO L130 BoogieDeclarations]: Found specification of procedure DRIVE [2024-11-02 12:27:41,638 INFO L138 BoogieDeclarations]: Found implementation of procedure DRIVE [2024-11-02 12:27:41,639 INFO L130 BoogieDeclarations]: Found specification of procedure pg_write [2024-11-02 12:27:41,639 INFO L138 BoogieDeclarations]: Found implementation of procedure pg_write [2024-11-02 12:27:41,639 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-02 12:27:41,639 INFO L130 BoogieDeclarations]: Found specification of procedure pg_reset [2024-11-02 12:27:41,639 INFO L138 BoogieDeclarations]: Found implementation of procedure pg_reset [2024-11-02 12:27:41,639 INFO L130 BoogieDeclarations]: Found specification of procedure pg_identify [2024-11-02 12:27:41,640 INFO L138 BoogieDeclarations]: Found implementation of procedure pg_identify [2024-11-02 12:27:41,640 INFO L130 BoogieDeclarations]: Found specification of procedure pi_write_block [2024-11-02 12:27:41,640 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_write_block [2024-11-02 12:27:41,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 12:27:41,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2024-11-02 12:27:41,640 INFO L130 BoogieDeclarations]: Found specification of procedure pi_init [2024-11-02 12:27:41,641 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_init [2024-11-02 12:27:41,641 INFO L130 BoogieDeclarations]: Found specification of procedure pi_read_regr [2024-11-02 12:27:41,641 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_read_regr [2024-11-02 12:27:41,641 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2024-11-02 12:27:41,641 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2024-11-02 12:27:41,641 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2024-11-02 12:27:41,642 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2024-11-02 12:27:41,642 INFO L130 BoogieDeclarations]: Found specification of procedure pg_probe [2024-11-02 12:27:41,642 INFO L138 BoogieDeclarations]: Found implementation of procedure pg_probe [2024-11-02 12:27:41,642 INFO L130 BoogieDeclarations]: Found specification of procedure pi_connect [2024-11-02 12:27:41,643 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_connect [2024-11-02 12:27:41,643 INFO L130 BoogieDeclarations]: Found specification of procedure pg_command [2024-11-02 12:27:41,643 INFO L138 BoogieDeclarations]: Found implementation of procedure pg_command [2024-11-02 12:27:41,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:27:41,643 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2024-11-02 12:27:41,643 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2024-11-02 12:27:41,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:27:41,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:27:41,644 INFO L130 BoogieDeclarations]: Found specification of procedure xs [2024-11-02 12:27:41,644 INFO L138 BoogieDeclarations]: Found implementation of procedure xs [2024-11-02 12:27:42,064 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:27:42,068 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:27:47,110 INFO L? ?]: Removed 575 outVars from TransFormulas that were not future-live. [2024-11-02 12:27:47,110 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:27:47,702 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:27:47,702 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-02 12:27:47,703 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:27:47 BoogieIcfgContainer [2024-11-02 12:27:47,703 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:27:47,705 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:27:47,705 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:27:47,711 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:27:47,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:27:39" (1/3) ... [2024-11-02 12:27:47,712 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f70d2ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:27:47, skipping insertion in model container [2024-11-02 12:27:47,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:27:41" (2/3) ... [2024-11-02 12:27:47,713 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f70d2ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:27:47, skipping insertion in model container [2024-11-02 12:27:47,713 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:27:47" (3/3) ... [2024-11-02 12:27:47,715 INFO L112 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--block--paride--pg.ko-main.cil.out.i [2024-11-02 12:27:47,734 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:27:47,735 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:27:47,831 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:27:47,839 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;@1f66ca4c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:27:47,839 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:27:47,846 INFO L276 IsEmpty]: Start isEmpty. Operand has 382 states, 247 states have (on average 1.3927125506072875) internal successors, (344), 257 states have internal predecessors, (344), 102 states have call successors, (102), 31 states have call predecessors, (102), 31 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) [2024-11-02 12:27:47,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-02 12:27:47,857 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:47,858 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:27:47,858 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:27:47,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:47,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1808208729, now seen corresponding path program 1 times [2024-11-02 12:27:47,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:47,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221375364] [2024-11-02 12:27:47,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:47,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:49,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:27:49,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:49,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221375364] [2024-11-02 12:27:49,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221375364] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:27:49,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:27:49,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:27:49,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025247988] [2024-11-02 12:27:49,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:27:49,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:27:49,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:49,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:27:49,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:27:49,710 INFO L87 Difference]: Start difference. First operand has 382 states, 247 states have (on average 1.3927125506072875) internal successors, (344), 257 states have internal predecessors, (344), 102 states have call successors, (102), 31 states have call predecessors, (102), 31 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:51,792 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 [] [2024-11-02 12:27:52,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:52,515 INFO L93 Difference]: Finished difference Result 1003 states and 1435 transitions. [2024-11-02 12:27:52,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:27:52,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-02 12:27:52,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:52,544 INFO L225 Difference]: With dead ends: 1003 [2024-11-02 12:27:52,544 INFO L226 Difference]: Without dead ends: 618 [2024-11-02 12:27:52,552 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:27:52,559 INFO L432 NwaCegarLoop]: 548 mSDtfsCounter, 341 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:52,560 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 988 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 185 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2024-11-02 12:27:52,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2024-11-02 12:27:52,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 604. [2024-11-02 12:27:52,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 388 states have (on average 1.3634020618556701) internal successors, (529), 398 states have internal predecessors, (529), 165 states have call successors, (165), 51 states have call predecessors, (165), 50 states have return successors, (159), 159 states have call predecessors, (159), 159 states have call successors, (159) [2024-11-02 12:27:52,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 853 transitions. [2024-11-02 12:27:52,670 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 853 transitions. Word has length 13 [2024-11-02 12:27:52,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:52,671 INFO L471 AbstractCegarLoop]: Abstraction has 604 states and 853 transitions. [2024-11-02 12:27:52,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:52,671 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 853 transitions. [2024-11-02 12:27:52,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-02 12:27:52,673 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:52,673 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:27:52,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:27:52,674 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:27:52,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:52,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1789195632, now seen corresponding path program 1 times [2024-11-02 12:27:52,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:52,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035515172] [2024-11-02 12:27:52,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:52,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:53,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:27:53,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:53,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035515172] [2024-11-02 12:27:53,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035515172] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:27:53,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:27:53,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:27:53,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614083061] [2024-11-02 12:27:53,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:27:53,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:27:53,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:53,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:27:53,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:27:53,867 INFO L87 Difference]: Start difference. First operand 604 states and 853 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:55,927 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 [] [2024-11-02 12:27:56,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:27:56,473 INFO L93 Difference]: Finished difference Result 1207 states and 1705 transitions. [2024-11-02 12:27:56,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:27:56,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-02 12:27:56,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:27:56,484 INFO L225 Difference]: With dead ends: 1207 [2024-11-02 12:27:56,485 INFO L226 Difference]: Without dead ends: 604 [2024-11-02 12:27:56,488 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:27:56,489 INFO L432 NwaCegarLoop]: 459 mSDtfsCounter, 530 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-02 12:27:56,492 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 459 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2024-11-02 12:27:56,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2024-11-02 12:27:56,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2024-11-02 12:27:56,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 388 states have (on average 1.3582474226804124) internal successors, (527), 398 states have internal predecessors, (527), 165 states have call successors, (165), 51 states have call predecessors, (165), 50 states have return successors, (159), 159 states have call predecessors, (159), 159 states have call successors, (159) [2024-11-02 12:27:56,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 851 transitions. [2024-11-02 12:27:56,585 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 851 transitions. Word has length 15 [2024-11-02 12:27:56,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:27:56,587 INFO L471 AbstractCegarLoop]: Abstraction has 604 states and 851 transitions. [2024-11-02 12:27:56,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:27:56,588 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 851 transitions. [2024-11-02 12:27:56,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-02 12:27:56,590 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:27:56,590 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:27:56,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:27:56,591 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:27:56,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:27:56,594 INFO L85 PathProgramCache]: Analyzing trace with hash -376415827, now seen corresponding path program 1 times [2024-11-02 12:27:56,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:27:56,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919500901] [2024-11-02 12:27:56,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:27:56,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:27:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:27:58,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:27:58,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:27:58,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919500901] [2024-11-02 12:27:58,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919500901] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:27:58,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:27:58,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:27:58,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409867906] [2024-11-02 12:27:58,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:27:58,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:27:58,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:27:58,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:27:58,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:27:58,078 INFO L87 Difference]: Start difference. First operand 604 states and 851 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:28:00,139 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 [] [2024-11-02 12:28:00,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:00,793 INFO L93 Difference]: Finished difference Result 1385 states and 1937 transitions. [2024-11-02 12:28:00,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:28:00,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-11-02 12:28:00,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:00,800 INFO L225 Difference]: With dead ends: 1385 [2024-11-02 12:28:00,800 INFO L226 Difference]: Without dead ends: 782 [2024-11-02 12:28:00,804 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 [2024-11-02 12:28:00,805 INFO L432 NwaCegarLoop]: 544 mSDtfsCounter, 336 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:00,806 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 903 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 169 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2024-11-02 12:28:00,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2024-11-02 12:28:00,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 782. [2024-11-02 12:28:00,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 495 states have (on average 1.3333333333333333) internal successors, (660), 507 states have internal predecessors, (660), 215 states have call successors, (215), 72 states have call predecessors, (215), 71 states have return successors, (209), 209 states have call predecessors, (209), 209 states have call successors, (209) [2024-11-02 12:28:00,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1084 transitions. [2024-11-02 12:28:00,904 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1084 transitions. Word has length 17 [2024-11-02 12:28:00,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:00,904 INFO L471 AbstractCegarLoop]: Abstraction has 782 states and 1084 transitions. [2024-11-02 12:28:00,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:28:00,905 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1084 transitions. [2024-11-02 12:28:00,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-02 12:28:00,906 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:00,906 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:28:00,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:28:00,907 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:00,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:00,909 INFO L85 PathProgramCache]: Analyzing trace with hash 815478631, now seen corresponding path program 1 times [2024-11-02 12:28:00,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:00,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370655473] [2024-11-02 12:28:00,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:00,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:28:02,024 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:02,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370655473] [2024-11-02 12:28:02,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370655473] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:28:02,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:28:02,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:28:02,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422301229] [2024-11-02 12:28:02,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:28:02,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:28:02,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:02,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:28:02,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:28:02,027 INFO L87 Difference]: Start difference. First operand 782 states and 1084 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:28:04,084 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 [] [2024-11-02 12:28:06,093 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 [] [2024-11-02 12:28:06,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:06,653 INFO L93 Difference]: Finished difference Result 1562 states and 2168 transitions. [2024-11-02 12:28:06,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:28:06,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2024-11-02 12:28:06,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:06,662 INFO L225 Difference]: With dead ends: 1562 [2024-11-02 12:28:06,662 INFO L226 Difference]: Without dead ends: 790 [2024-11-02 12:28:06,667 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 [2024-11-02 12:28:06,669 INFO L432 NwaCegarLoop]: 460 mSDtfsCounter, 3 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:06,669 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 919 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 154 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2024-11-02 12:28:06,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2024-11-02 12:28:06,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 784. [2024-11-02 12:28:06,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 497 states have (on average 1.3319919517102616) internal successors, (662), 509 states have internal predecessors, (662), 215 states have call successors, (215), 72 states have call predecessors, (215), 71 states have return successors, (209), 209 states have call predecessors, (209), 209 states have call successors, (209) [2024-11-02 12:28:06,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1086 transitions. [2024-11-02 12:28:06,749 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1086 transitions. Word has length 24 [2024-11-02 12:28:06,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:06,750 INFO L471 AbstractCegarLoop]: Abstraction has 784 states and 1086 transitions. [2024-11-02 12:28:06,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-02 12:28:06,751 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1086 transitions. [2024-11-02 12:28:06,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-02 12:28:06,754 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:06,754 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:28:06,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:28:06,755 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:06,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:06,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1806013185, now seen corresponding path program 1 times [2024-11-02 12:28:06,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:06,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223895564] [2024-11-02 12:28:06,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:06,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:07,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:28:08,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:08,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223895564] [2024-11-02 12:28:08,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223895564] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:28:08,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300061726] [2024-11-02 12:28:08,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:08,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:08,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbf78e4-f052-4e7b-9291-f634d9a63e0c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:08,165 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbf78e4-f052-4e7b-9291-f634d9a63e0c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:28:08,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2bbf78e4-f052-4e7b-9291-f634d9a63e0c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:28:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:09,804 INFO L255 TraceCheckSpWp]: Trace formula consists of 2546 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-02 12:28:09,813 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:28:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:28:09,851 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:28:09,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300061726] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:28:09,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:28:09,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-02 12:28:09,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514442574] [2024-11-02 12:28:09,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:28:09,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:28:09,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:09,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:28:09,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:28:09,855 INFO L87 Difference]: Start difference. First operand 784 states and 1086 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)