./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 230b725329634d718374ec3f6d82161758e5d9913588383fdc3e35a9fd1533f5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:38:06,358 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:38:06,424 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 20:38:06,430 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:38:06,430 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:38:06,457 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:38:06,457 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:38:06,458 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:38:06,459 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:38:06,460 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:38:06,460 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:38:06,461 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:38:06,462 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:38:06,462 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:38:06,466 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:38:06,467 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:38:06,468 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:38:06,469 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:38:06,471 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:38:06,471 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:38:06,472 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:38:06,472 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:38:06,473 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:38:06,474 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:38:06,474 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:38:06,475 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:38:06,475 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:38:06,476 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:38:06,476 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:38:06,476 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:38:06,478 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:38:06,478 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:38:06,478 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:38:06,479 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:38:06,479 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:38:06,479 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:38:06,480 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:38:06,480 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:38:06,480 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:38:06,481 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:38:06,481 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:38:06,482 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:38:06,482 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:38:06,482 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:38:06,483 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_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 230b725329634d718374ec3f6d82161758e5d9913588383fdc3e35a9fd1533f5 [2023-11-23 20:38:06,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:38:06,791 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:38:06,794 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:38:06,795 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:38:06,796 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:38:06,797 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i [2023-11-23 20:38:09,999 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:38:10,570 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:38:10,571 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i [2023-11-23 20:38:10,614 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/data/795ded1f3/867230c7b9db43629b03f3b76966693c/FLAGfd9cfab8c [2023-11-23 20:38:10,632 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/data/795ded1f3/867230c7b9db43629b03f3b76966693c [2023-11-23 20:38:10,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:38:10,642 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:38:10,644 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:38:10,645 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:38:10,651 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:38:10,654 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:38:10" (1/1) ... [2023-11-23 20:38:10,655 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b538745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:10, skipping insertion in model container [2023-11-23 20:38:10,655 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:38:10" (1/1) ... [2023-11-23 20:38:10,802 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:38:12,276 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i[164687,164700] [2023-11-23 20:38:12,330 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:38:12,372 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:38:12,505 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; subl %2, %0; sete %1": "+m" (v->counter), "=qm" (c): "er" (i): "memory"); [4273-4274] [2023-11-23 20:38:12,508 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; xaddb %b0, %1\n": "+q" (__ret), "+m" (v->counter): : "memory", "cc"); [4285-4286] [2023-11-23 20:38:12,508 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; xaddw %w0, %1\n": "+r" (__ret), "+m" (v->counter): : "memory", "cc"); [4289-4290] [2023-11-23 20:38:12,509 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; xaddl %0, %1\n": "+r" (__ret), "+m" (v->counter): : "memory", "cc"); [4293-4294] [2023-11-23 20:38:12,509 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; xaddq %q0, %1\n": "+r" (__ret), "+m" (v->counter): : "memory", "cc"); [4297-4298] [2023-11-23 20:38:12,721 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i[164687,164700] [2023-11-23 20:38:12,737 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:38:12,796 WARN L675 CHandler]: The function strncmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:38:12,797 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:38:12,797 WARN L675 CHandler]: The function __xadd_wrong_size is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:38:12,805 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:38:12,805 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:12 WrapperNode [2023-11-23 20:38:12,806 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:38:12,807 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:38:12,808 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:38:12,808 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:38:12,816 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:12" (1/1) ... [2023-11-23 20:38:12,905 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:12" (1/1) ... [2023-11-23 20:38:13,009 INFO L138 Inliner]: procedures = 147, calls = 885, calls flagged for inlining = 61, calls inlined = 59, statements flattened = 2100 [2023-11-23 20:38:13,010 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:38:13,010 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:38:13,010 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:38:13,015 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:38:13,035 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:12" (1/1) ... [2023-11-23 20:38:13,035 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:12" (1/1) ... [2023-11-23 20:38:13,058 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:12" (1/1) ... [2023-11-23 20:38:13,061 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:12" (1/1) ... [2023-11-23 20:38:13,137 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:12" (1/1) ... [2023-11-23 20:38:13,148 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:12" (1/1) ... [2023-11-23 20:38:13,160 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:12" (1/1) ... [2023-11-23 20:38:13,187 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:12" (1/1) ... [2023-11-23 20:38:13,201 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:38:13,202 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:38:13,206 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:38:13,207 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:38:13,208 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:12" (1/1) ... [2023-11-23 20:38:13,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:38:13,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:13,243 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:38:13,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:38:13,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 20:38:13,287 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2023-11-23 20:38:13,287 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2023-11-23 20:38:13,288 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2023-11-23 20:38:13,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-23 20:38:13,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-23 20:38:13,288 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 20:38:13,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 20:38:13,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:38:13,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-23 20:38:13,289 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-23 20:38:13,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-23 20:38:13,290 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-23 20:38:13,290 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 20:38:13,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 20:38:13,291 INFO L130 BoogieDeclarations]: Found specification of procedure get_rdac_data [2023-11-23 20:38:13,291 INFO L138 BoogieDeclarations]: Found implementation of procedure get_rdac_data [2023-11-23 20:38:13,292 INFO L130 BoogieDeclarations]: Found specification of procedure blk_put_request [2023-11-23 20:38:13,293 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_put_request [2023-11-23 20:38:13,293 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2023-11-23 20:38:13,293 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2023-11-23 20:38:13,294 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-23 20:38:13,294 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-23 20:38:13,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:38:13,294 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 20:38:13,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 20:38:13,295 INFO L130 BoogieDeclarations]: Found specification of procedure send_mode_select [2023-11-23 20:38:13,296 INFO L138 BoogieDeclarations]: Found implementation of procedure send_mode_select [2023-11-23 20:38:13,296 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2023-11-23 20:38:13,296 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2023-11-23 20:38:13,296 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-23 20:38:13,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-23 20:38:13,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-23 20:38:13,297 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-23 20:38:13,297 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-23 20:38:13,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-23 20:38:13,297 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 20:38:13,297 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 20:38:13,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:38:13,298 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~VOID [2023-11-23 20:38:13,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~VOID [2023-11-23 20:38:13,298 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_unregister_device_handler [2023-11-23 20:38:13,298 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_unregister_device_handler [2023-11-23 20:38:13,298 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2023-11-23 20:38:13,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2023-11-23 20:38:13,299 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2023-11-23 20:38:13,299 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2023-11-23 20:38:13,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:38:13,299 INFO L130 BoogieDeclarations]: Found specification of procedure submit_inquiry [2023-11-23 20:38:13,299 INFO L138 BoogieDeclarations]: Found implementation of procedure submit_inquiry [2023-11-23 20:38:13,299 INFO L130 BoogieDeclarations]: Found specification of procedure rdac_bus_detach [2023-11-23 20:38:13,300 INFO L138 BoogieDeclarations]: Found implementation of procedure rdac_bus_detach [2023-11-23 20:38:13,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:38:13,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 20:38:13,301 INFO L130 BoogieDeclarations]: Found specification of procedure rdac_match [2023-11-23 20:38:13,302 INFO L138 BoogieDeclarations]: Found implementation of procedure rdac_match [2023-11-23 20:38:13,302 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2023-11-23 20:38:13,302 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2023-11-23 20:38:13,302 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-23 20:38:13,303 INFO L130 BoogieDeclarations]: Found specification of procedure blk_execute_rq [2023-11-23 20:38:13,303 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_execute_rq [2023-11-23 20:38:13,303 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-23 20:38:13,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-23 20:38:13,303 INFO L130 BoogieDeclarations]: Found specification of procedure sdev_prefix_printk [2023-11-23 20:38:13,303 INFO L138 BoogieDeclarations]: Found implementation of procedure sdev_prefix_printk [2023-11-23 20:38:13,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 20:38:13,304 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2023-11-23 20:38:13,304 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_work_1 [2023-11-23 20:38:13,304 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_work_1 [2023-11-23 20:38:13,304 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2023-11-23 20:38:13,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2023-11-23 20:38:13,305 INFO L130 BoogieDeclarations]: Found specification of procedure check_ownership [2023-11-23 20:38:13,305 INFO L138 BoogieDeclarations]: Found implementation of procedure check_ownership [2023-11-23 20:38:13,305 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_all_1 [2023-11-23 20:38:13,305 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_all_1 [2023-11-23 20:38:13,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:38:13,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 20:38:13,306 INFO L130 BoogieDeclarations]: Found specification of procedure get_rdac_req [2023-11-23 20:38:13,307 INFO L138 BoogieDeclarations]: Found implementation of procedure get_rdac_req [2023-11-23 20:38:13,307 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-23 20:38:13,307 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-23 20:38:13,307 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2023-11-23 20:38:13,308 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2023-11-23 20:38:13,308 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2023-11-23 20:38:13,308 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2023-11-23 20:38:13,308 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2023-11-23 20:38:13,308 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2023-11-23 20:38:13,308 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-11-23 20:38:13,309 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-11-23 20:38:13,309 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2023-11-23 20:38:13,309 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2023-11-23 20:38:13,309 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2023-11-23 20:38:13,309 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2023-11-23 20:38:13,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:38:13,310 INFO L130 BoogieDeclarations]: Found specification of procedure flush_workqueue [2023-11-23 20:38:13,310 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_workqueue [2023-11-23 20:38:13,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-23 20:38:13,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:38:13,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:38:13,310 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-11-23 20:38:13,310 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-11-23 20:38:13,795 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:38:13,800 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:38:14,238 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 20:38:15,853 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:38:16,562 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:38:16,562 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 20:38:16,564 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:38:16 BoogieIcfgContainer [2023-11-23 20:38:16,564 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:38:16,570 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:38:16,571 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:38:16,574 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:38:16,574 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:38:10" (1/3) ... [2023-11-23 20:38:16,575 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cb1e345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:38:16, skipping insertion in model container [2023-11-23 20:38:16,575 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:12" (2/3) ... [2023-11-23 20:38:16,577 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cb1e345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:38:16, skipping insertion in model container [2023-11-23 20:38:16,577 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:38:16" (3/3) ... [2023-11-23 20:38:16,578 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--scsi--device_handler--scsi_dh_rdac.ko-entry_point.cil.out.i [2023-11-23 20:38:16,598 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:38:16,599 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:38:16,689 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:38:16,698 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@65f0c44e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:38:16,699 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:38:16,709 INFO L276 IsEmpty]: Start isEmpty. Operand has 458 states, 291 states have (on average 1.3917525773195876) internal successors, (405), 311 states have internal predecessors, (405), 125 states have call successors, (125), 41 states have call predecessors, (125), 40 states have return successors, (121), 120 states have call predecessors, (121), 121 states have call successors, (121) [2023-11-23 20:38:16,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-23 20:38:16,733 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:16,735 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:38:16,736 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:16,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:16,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1473859354, now seen corresponding path program 1 times [2023-11-23 20:38:16,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:16,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069772924] [2023-11-23 20:38:16,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:16,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:17,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:17,472 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-23 20:38:17,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:17,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069772924] [2023-11-23 20:38:17,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069772924] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:17,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:38:17,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:38:17,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165808397] [2023-11-23 20:38:17,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:17,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:38:17,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:17,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:38:17,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:38:17,542 INFO L87 Difference]: Start difference. First operand has 458 states, 291 states have (on average 1.3917525773195876) internal successors, (405), 311 states have internal predecessors, (405), 125 states have call successors, (125), 41 states have call predecessors, (125), 40 states have return successors, (121), 120 states have call predecessors, (121), 121 states have call successors, (121) Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-23 20:38:18,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:18,868 INFO L93 Difference]: Finished difference Result 1117 states and 1579 transitions. [2023-11-23 20:38:18,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:38:18,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 56 [2023-11-23 20:38:18,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:18,908 INFO L225 Difference]: With dead ends: 1117 [2023-11-23 20:38:18,908 INFO L226 Difference]: Without dead ends: 621 [2023-11-23 20:38:18,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:38:18,931 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 293 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 1178 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:18,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 1178 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 20:38:18,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2023-11-23 20:38:19,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 617. [2023-11-23 20:38:19,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 400 states have (on average 1.365) internal successors, (546), 416 states have internal predecessors, (546), 156 states have call successors, (156), 61 states have call predecessors, (156), 60 states have return successors, (155), 154 states have call predecessors, (155), 155 states have call successors, (155) [2023-11-23 20:38:19,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 857 transitions. [2023-11-23 20:38:19,116 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 857 transitions. Word has length 56 [2023-11-23 20:38:19,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:19,117 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 857 transitions. [2023-11-23 20:38:19,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-23 20:38:19,118 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 857 transitions. [2023-11-23 20:38:19,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-23 20:38:19,130 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:19,131 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2023-11-23 20:38:19,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:38:19,131 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:19,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:19,132 INFO L85 PathProgramCache]: Analyzing trace with hash 96505174, now seen corresponding path program 1 times [2023-11-23 20:38:19,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:19,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012468516] [2023-11-23 20:38:19,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:19,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:19,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:19,780 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-11-23 20:38:19,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:19,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012468516] [2023-11-23 20:38:19,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012468516] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:19,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:38:19,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:38:19,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138631884] [2023-11-23 20:38:19,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:19,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:38:19,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:19,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:38:19,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:38:19,784 INFO L87 Difference]: Start difference. First operand 617 states and 857 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 20:38:20,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:20,593 INFO L93 Difference]: Finished difference Result 703 states and 969 transitions. [2023-11-23 20:38:20,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:38:20,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 84 [2023-11-23 20:38:20,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:20,602 INFO L225 Difference]: With dead ends: 703 [2023-11-23 20:38:20,602 INFO L226 Difference]: Without dead ends: 700 [2023-11-23 20:38:20,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:38:20,611 INFO L413 NwaCegarLoop]: 559 mSDtfsCounter, 494 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 1292 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:20,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 1292 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 20:38:20,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2023-11-23 20:38:20,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 683. [2023-11-23 20:38:20,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 436 states have (on average 1.3623853211009174) internal successors, (594), 460 states have internal predecessors, (594), 173 states have call successors, (173), 76 states have call predecessors, (173), 73 states have return successors, (177), 165 states have call predecessors, (177), 172 states have call successors, (177) [2023-11-23 20:38:20,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 944 transitions. [2023-11-23 20:38:20,689 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 944 transitions. Word has length 84 [2023-11-23 20:38:20,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:20,694 INFO L495 AbstractCegarLoop]: Abstraction has 683 states and 944 transitions. [2023-11-23 20:38:20,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 3 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 20:38:20,695 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 944 transitions. [2023-11-23 20:38:20,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-23 20:38:20,711 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:20,711 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:38:20,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:38:20,711 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:20,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:20,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1219485019, now seen corresponding path program 1 times [2023-11-23 20:38:20,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:20,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170139049] [2023-11-23 20:38:20,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:20,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:20,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-11-23 20:38:21,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:21,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170139049] [2023-11-23 20:38:21,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170139049] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:38:21,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632149446] [2023-11-23 20:38:21,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:21,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:21,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:21,332 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:38:21,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:38:22,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:22,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 2404 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 20:38:22,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:38:22,281 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-11-23 20:38:22,281 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:38:22,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632149446] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:22,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:38:22,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2023-11-23 20:38:22,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215799872] [2023-11-23 20:38:22,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:22,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:38:22,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:22,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:38:22,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-23 20:38:22,286 INFO L87 Difference]: Start difference. First operand 683 states and 944 transitions. Second operand has 6 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 3 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-23 20:38:23,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:23,764 INFO L93 Difference]: Finished difference Result 1355 states and 1877 transitions. [2023-11-23 20:38:23,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:38:23,765 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 3 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) Word has length 163 [2023-11-23 20:38:23,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:23,772 INFO L225 Difference]: With dead ends: 1355 [2023-11-23 20:38:23,772 INFO L226 Difference]: Without dead ends: 689 [2023-11-23 20:38:23,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-23 20:38:23,777 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 5 mSDsluCounter, 2167 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 2712 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:23,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 2712 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-23 20:38:23,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2023-11-23 20:38:23,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 687. [2023-11-23 20:38:23,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 439 states have (on average 1.3599088838268794) internal successors, (597), 462 states have internal predecessors, (597), 173 states have call successors, (173), 76 states have call predecessors, (173), 74 states have return successors, (181), 166 states have call predecessors, (181), 172 states have call successors, (181) [2023-11-23 20:38:23,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 951 transitions. [2023-11-23 20:38:23,826 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 951 transitions. Word has length 163 [2023-11-23 20:38:23,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:23,827 INFO L495 AbstractCegarLoop]: Abstraction has 687 states and 951 transitions. [2023-11-23 20:38:23,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 3 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-23 20:38:23,827 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 951 transitions. [2023-11-23 20:38:23,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-23 20:38:23,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:23,834 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:38:23,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:38:24,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:24,059 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:24,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:24,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1552881670, now seen corresponding path program 1 times [2023-11-23 20:38:24,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:24,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434073916] [2023-11-23 20:38:24,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:24,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:24,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:24,865 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-11-23 20:38:24,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:24,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434073916] [2023-11-23 20:38:24,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434073916] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:38:24,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154917347] [2023-11-23 20:38:24,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:24,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:24,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:24,871 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:38:24,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:38:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:25,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 2396 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 20:38:25,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:38:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-11-23 20:38:25,741 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:38:25,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154917347] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:25,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:38:25,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2023-11-23 20:38:25,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613791557] [2023-11-23 20:38:25,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:25,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 20:38:25,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:25,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 20:38:25,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-23 20:38:25,746 INFO L87 Difference]: Start difference. First operand 687 states and 951 transitions. Second operand has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-23 20:38:27,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:27,831 INFO L93 Difference]: Finished difference Result 1536 states and 2167 transitions. [2023-11-23 20:38:27,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 20:38:27,832 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) Word has length 163 [2023-11-23 20:38:27,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:27,839 INFO L225 Difference]: With dead ends: 1536 [2023-11-23 20:38:27,839 INFO L226 Difference]: Without dead ends: 866 [2023-11-23 20:38:27,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-11-23 20:38:27,844 INFO L413 NwaCegarLoop]: 730 mSDtfsCounter, 160 mSDsluCounter, 4196 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 4926 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:27,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 4926 Invalid, 752 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-23 20:38:27,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2023-11-23 20:38:27,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 690. [2023-11-23 20:38:27,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 442 states have (on average 1.3574660633484164) internal successors, (600), 465 states have internal predecessors, (600), 173 states have call successors, (173), 76 states have call predecessors, (173), 74 states have return successors, (181), 166 states have call predecessors, (181), 172 states have call successors, (181) [2023-11-23 20:38:27,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 954 transitions. [2023-11-23 20:38:27,895 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 954 transitions. Word has length 163 [2023-11-23 20:38:27,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:27,896 INFO L495 AbstractCegarLoop]: Abstraction has 690 states and 954 transitions. [2023-11-23 20:38:27,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-23 20:38:27,896 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 954 transitions. [2023-11-23 20:38:27,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-11-23 20:38:27,902 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:27,903 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:38:27,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:38:28,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:28,123 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:28,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:28,124 INFO L85 PathProgramCache]: Analyzing trace with hash 543590872, now seen corresponding path program 1 times [2023-11-23 20:38:28,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:28,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375286626] [2023-11-23 20:38:28,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:28,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:28,620 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-23 20:38:28,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:28,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375286626] [2023-11-23 20:38:28,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375286626] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:28,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:38:28,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 20:38:28,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526147526] [2023-11-23 20:38:28,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:28,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:38:28,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:28,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:38:28,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:38:28,624 INFO L87 Difference]: Start difference. First operand 690 states and 954 transitions. Second operand has 6 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-23 20:38:29,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:29,924 INFO L93 Difference]: Finished difference Result 1366 states and 1891 transitions. [2023-11-23 20:38:29,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:38:29,925 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) Word has length 175 [2023-11-23 20:38:29,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:29,931 INFO L225 Difference]: With dead ends: 1366 [2023-11-23 20:38:29,931 INFO L226 Difference]: Without dead ends: 693 [2023-11-23 20:38:29,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:38:29,936 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 4 mSDsluCounter, 2174 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 2720 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:29,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 2720 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 20:38:29,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2023-11-23 20:38:29,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 692. [2023-11-23 20:38:29,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 444 states have (on average 1.3558558558558558) internal successors, (602), 466 states have internal predecessors, (602), 173 states have call successors, (173), 76 states have call predecessors, (173), 74 states have return successors, (181), 167 states have call predecessors, (181), 172 states have call successors, (181) [2023-11-23 20:38:29,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 956 transitions. [2023-11-23 20:38:29,980 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 956 transitions. Word has length 175 [2023-11-23 20:38:29,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:29,981 INFO L495 AbstractCegarLoop]: Abstraction has 692 states and 956 transitions. [2023-11-23 20:38:29,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 3 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 3 states have call successors, (21) [2023-11-23 20:38:29,981 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 956 transitions. [2023-11-23 20:38:29,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-11-23 20:38:29,988 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:29,988 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:38:29,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 20:38:29,989 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:29,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:29,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1965563050, now seen corresponding path program 1 times [2023-11-23 20:38:29,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:29,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827385255] [2023-11-23 20:38:29,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:29,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:31,531 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2023-11-23 20:38:31,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:31,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827385255] [2023-11-23 20:38:31,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827385255] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:38:31,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714472846] [2023-11-23 20:38:31,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:31,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:31,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:31,534 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:38:31,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:38:32,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:32,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 2704 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 20:38:32,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:38:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-23 20:38:32,489 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:38:32,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714472846] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:32,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:38:32,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-11-23 20:38:32,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35517830] [2023-11-23 20:38:32,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:32,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:38:32,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:32,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:38:32,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-23 20:38:32,494 INFO L87 Difference]: Start difference. First operand 692 states and 956 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-11-23 20:38:33,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:33,930 INFO L93 Difference]: Finished difference Result 1547 states and 2178 transitions. [2023-11-23 20:38:33,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:38:33,931 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 187 [2023-11-23 20:38:33,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:33,938 INFO L225 Difference]: With dead ends: 1547 [2023-11-23 20:38:33,938 INFO L226 Difference]: Without dead ends: 872 [2023-11-23 20:38:33,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-23 20:38:33,943 INFO L413 NwaCegarLoop]: 732 mSDtfsCounter, 160 mSDsluCounter, 2012 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 2744 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:33,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 2744 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-23 20:38:33,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2023-11-23 20:38:33,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 692. [2023-11-23 20:38:33,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 444 states have (on average 1.3558558558558558) internal successors, (602), 466 states have internal predecessors, (602), 173 states have call successors, (173), 76 states have call predecessors, (173), 74 states have return successors, (181), 167 states have call predecessors, (181), 172 states have call successors, (181) [2023-11-23 20:38:33,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 956 transitions. [2023-11-23 20:38:33,992 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 956 transitions. Word has length 187 [2023-11-23 20:38:33,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:33,993 INFO L495 AbstractCegarLoop]: Abstraction has 692 states and 956 transitions. [2023-11-23 20:38:33,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2023-11-23 20:38:33,993 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 956 transitions. [2023-11-23 20:38:33,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-11-23 20:38:33,999 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:34,000 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:38:34,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:38:34,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:34,223 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:34,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:34,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1450572518, now seen corresponding path program 1 times [2023-11-23 20:38:34,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:34,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304309525] [2023-11-23 20:38:34,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:34,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:34,709 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-11-23 20:38:34,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:34,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304309525] [2023-11-23 20:38:34,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304309525] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:34,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:38:34,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:38:34,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112336340] [2023-11-23 20:38:34,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:34,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:38:34,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:34,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:38:34,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:38:34,716 INFO L87 Difference]: Start difference. First operand 692 states and 956 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-23 20:38:35,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:35,540 INFO L93 Difference]: Finished difference Result 1368 states and 1893 transitions. [2023-11-23 20:38:35,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:38:35,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 201 [2023-11-23 20:38:35,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:35,548 INFO L225 Difference]: With dead ends: 1368 [2023-11-23 20:38:35,548 INFO L226 Difference]: Without dead ends: 693 [2023-11-23 20:38:35,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:38:35,552 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 0 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:35,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1092 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 20:38:35,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2023-11-23 20:38:35,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 693. [2023-11-23 20:38:35,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 445 states have (on average 1.355056179775281) internal successors, (603), 467 states have internal predecessors, (603), 173 states have call successors, (173), 76 states have call predecessors, (173), 74 states have return successors, (181), 167 states have call predecessors, (181), 172 states have call successors, (181) [2023-11-23 20:38:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 957 transitions. [2023-11-23 20:38:35,596 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 957 transitions. Word has length 201 [2023-11-23 20:38:35,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:35,597 INFO L495 AbstractCegarLoop]: Abstraction has 693 states and 957 transitions. [2023-11-23 20:38:35,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-23 20:38:35,597 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 957 transitions. [2023-11-23 20:38:35,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-11-23 20:38:35,604 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:35,604 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:38:35,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 20:38:35,605 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:35,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:35,606 INFO L85 PathProgramCache]: Analyzing trace with hash 336761917, now seen corresponding path program 1 times [2023-11-23 20:38:35,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:35,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525755136] [2023-11-23 20:38:35,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:35,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:35,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-11-23 20:38:36,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:36,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525755136] [2023-11-23 20:38:36,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525755136] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:38:36,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292843746] [2023-11-23 20:38:36,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:36,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:36,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:36,126 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:38:36,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64e5c933-6737-4086-91e5-a5659f301bb1/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:38:36,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:37,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 2822 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:38:37,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:38:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 53 proven. 1 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-11-23 20:38:37,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:38:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-11-23 20:38:37,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292843746] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:38:37,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1847343895] [2023-11-23 20:38:37,249 INFO L159 IcfgInterpreter]: Started Sifa with 119 locations of interest [2023-11-23 20:38:37,250 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:38:37,254 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:38:37,259 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:38:37,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs