./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--block--paride--pt.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--block--paride--pt.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 0e5349f2aac0388d197fa32950f3e69d3339933dee46585f91772f9bda921aa4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:57:09,352 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:57:09,420 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-19 04:57:09,429 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:57:09,430 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:57:09,468 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:57:09,469 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:57:09,469 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:57:09,470 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:57:09,476 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:57:09,476 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:57:09,477 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:57:09,478 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:57:09,480 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:57:09,480 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:57:09,480 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:57:09,481 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:57:09,481 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:57:09,481 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:57:09,482 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:57:09,482 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:57:09,483 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:57:09,484 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:57:09,484 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:57:09,484 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:57:09,485 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:57:09,485 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:57:09,485 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:57:09,486 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:57:09,486 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:57:09,487 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:57:09,487 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:57:09,487 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:57:09,487 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:57:09,488 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:57:09,488 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:57:09,488 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:57:09,488 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:57:09,489 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:57:09,489 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:57:09,489 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:57:09,489 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:57:09,490 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_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e5349f2aac0388d197fa32950f3e69d3339933dee46585f91772f9bda921aa4 [2023-11-19 04:57:09,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:57:09,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:57:09,812 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:57:09,813 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:57:09,813 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:57:09,815 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--block--paride--pt.ko-entry_point.cil.out.i [2023-11-19 04:57:12,917 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:57:13,527 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:57:13,528 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--block--paride--pt.ko-entry_point.cil.out.i [2023-11-19 04:57:13,581 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/data/a4a0bfef1/b057918c59e44d82afc1ec41a7c0c324/FLAG73a25247b [2023-11-19 04:57:13,596 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/data/a4a0bfef1/b057918c59e44d82afc1ec41a7c0c324 [2023-11-19 04:57:13,598 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:57:13,600 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:57:13,601 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:57:13,602 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:57:13,607 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:57:13,608 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:57:13" (1/1) ... [2023-11-19 04:57:13,609 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@115a7d51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:13, skipping insertion in model container [2023-11-19 04:57:13,609 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:57:13" (1/1) ... [2023-11-19 04:57:13,698 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:57:14,131 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3059] [2023-11-19 04:57:14,132 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3060-3061] [2023-11-19 04:57:14,252 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_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--block--paride--pt.ko-entry_point.cil.out.i[90990,91003] [2023-11-19 04:57:14,672 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:57:14,719 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:57:14,909 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3059] [2023-11-19 04:57:14,923 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3060-3061] [2023-11-19 04:57:14,926 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; incl %0": "+m" (v->counter)); [3171] [2023-11-19 04:57:14,928 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; decl %0; sete %1": "+m" (v->counter), "=qm" (c): : "memory"); [3179-3180] [2023-11-19 04:57:14,932 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_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--block--paride--pt.ko-entry_point.cil.out.i[90990,91003] [2023-11-19 04:57:15,096 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:57:15,144 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:57:15,145 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:15 WrapperNode [2023-11-19 04:57:15,146 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:57:15,147 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:57:15,147 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:57:15,147 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:57:15,155 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:15" (1/1) ... [2023-11-19 04:57:15,230 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:15" (1/1) ... [2023-11-19 04:57:15,340 INFO L138 Inliner]: procedures = 119, calls = 789, calls flagged for inlining = 38, calls inlined = 36, statements flattened = 1734 [2023-11-19 04:57:15,340 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:57:15,341 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:57:15,341 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:57:15,341 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:57:15,358 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:15" (1/1) ... [2023-11-19 04:57:15,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:15" (1/1) ... [2023-11-19 04:57:15,373 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:15" (1/1) ... [2023-11-19 04:57:15,373 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:15" (1/1) ... [2023-11-19 04:57:15,440 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:15" (1/1) ... [2023-11-19 04:57:15,453 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:15" (1/1) ... [2023-11-19 04:57:15,465 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:15" (1/1) ... [2023-11-19 04:57:15,478 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:15" (1/1) ... [2023-11-19 04:57:15,517 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:57:15,519 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:57:15,519 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:57:15,520 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:57:15,521 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:15" (1/1) ... [2023-11-19 04:57:15,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:57:15,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:57:15,553 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:57:15,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:57:15,606 INFO L130 BoogieDeclarations]: Found specification of procedure pi_release [2023-11-19 04:57:15,608 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_release [2023-11-19 04:57:15,608 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2023-11-19 04:57:15,609 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2023-11-19 04:57:15,609 INFO L130 BoogieDeclarations]: Found specification of procedure pi_disconnect [2023-11-19 04:57:15,609 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_disconnect [2023-11-19 04:57:15,609 INFO L130 BoogieDeclarations]: Found specification of procedure status_reg [2023-11-19 04:57:15,609 INFO L138 BoogieDeclarations]: Found implementation of procedure status_reg [2023-11-19 04:57:15,610 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-19 04:57:15,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-19 04:57:15,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:57:15,610 INFO L130 BoogieDeclarations]: Found specification of procedure pi_read_block [2023-11-19 04:57:15,610 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_read_block [2023-11-19 04:57:15,610 INFO L130 BoogieDeclarations]: Found specification of procedure read_reg [2023-11-19 04:57:15,611 INFO L138 BoogieDeclarations]: Found implementation of procedure read_reg [2023-11-19 04:57:15,612 INFO L130 BoogieDeclarations]: Found specification of procedure pt_media_access_cmd [2023-11-19 04:57:15,612 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_media_access_cmd [2023-11-19 04:57:15,612 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-19 04:57:15,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-19 04:57:15,612 INFO L130 BoogieDeclarations]: Found specification of procedure pt_reset [2023-11-19 04:57:15,612 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_reset [2023-11-19 04:57:15,613 INFO L130 BoogieDeclarations]: Found specification of procedure pt_identify [2023-11-19 04:57:15,614 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_identify [2023-11-19 04:57:15,614 INFO L130 BoogieDeclarations]: Found specification of procedure pt_command [2023-11-19 04:57:15,614 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_command [2023-11-19 04:57:15,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:57:15,615 INFO L130 BoogieDeclarations]: Found specification of procedure pt_write [2023-11-19 04:57:15,615 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_write [2023-11-19 04:57:15,615 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-19 04:57:15,615 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-19 04:57:15,615 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-19 04:57:15,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-19 04:57:15,616 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-19 04:57:15,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-19 04:57:15,616 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 04:57:15,616 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 04:57:15,616 INFO L130 BoogieDeclarations]: Found specification of procedure pt_atapi [2023-11-19 04:57:15,616 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_atapi [2023-11-19 04:57:15,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 04:57:15,617 INFO L130 BoogieDeclarations]: Found specification of procedure pt_poll_dsc [2023-11-19 04:57:15,617 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_poll_dsc [2023-11-19 04:57:15,617 INFO L130 BoogieDeclarations]: Found specification of procedure pt_req_sense [2023-11-19 04:57:15,617 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_req_sense [2023-11-19 04:57:15,617 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2023-11-19 04:57:15,618 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2023-11-19 04:57:15,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:57:15,618 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2023-11-19 04:57:15,618 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2023-11-19 04:57:15,618 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2023-11-19 04:57:15,618 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2023-11-19 04:57:15,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 04:57:15,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:57:15,619 INFO L130 BoogieDeclarations]: Found specification of procedure DRIVE [2023-11-19 04:57:15,619 INFO L138 BoogieDeclarations]: Found implementation of procedure DRIVE [2023-11-19 04:57:15,619 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2023-11-19 04:57:15,619 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2023-11-19 04:57:15,619 INFO L130 BoogieDeclarations]: Found specification of procedure pt_completion [2023-11-19 04:57:15,620 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_completion [2023-11-19 04:57:15,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 04:57:15,621 INFO L130 BoogieDeclarations]: Found specification of procedure pt_sleep [2023-11-19 04:57:15,622 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_sleep [2023-11-19 04:57:15,622 INFO L130 BoogieDeclarations]: Found specification of procedure pt_write_fm [2023-11-19 04:57:15,622 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_write_fm [2023-11-19 04:57:15,622 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_20 [2023-11-19 04:57:15,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_20 [2023-11-19 04:57:15,622 INFO L130 BoogieDeclarations]: Found specification of procedure iminor [2023-11-19 04:57:15,623 INFO L138 BoogieDeclarations]: Found implementation of procedure iminor [2023-11-19 04:57:15,623 INFO L130 BoogieDeclarations]: Found specification of procedure pi_write_block [2023-11-19 04:57:15,624 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_write_block [2023-11-19 04:57:15,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:57:15,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 04:57:15,624 INFO L130 BoogieDeclarations]: Found specification of procedure pi_init [2023-11-19 04:57:15,624 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_init [2023-11-19 04:57:15,624 INFO L130 BoogieDeclarations]: Found specification of procedure pi_read_regr [2023-11-19 04:57:15,624 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_read_regr [2023-11-19 04:57:15,625 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2023-11-19 04:57:15,625 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2023-11-19 04:57:15,625 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-19 04:57:15,625 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-19 04:57:15,625 INFO L130 BoogieDeclarations]: Found specification of procedure pt_wait [2023-11-19 04:57:15,626 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_wait [2023-11-19 04:57:15,626 INFO L130 BoogieDeclarations]: Found specification of procedure pi_connect [2023-11-19 04:57:15,626 INFO L138 BoogieDeclarations]: Found implementation of procedure pi_connect [2023-11-19 04:57:15,627 INFO L130 BoogieDeclarations]: Found specification of procedure device_destroy [2023-11-19 04:57:15,627 INFO L138 BoogieDeclarations]: Found implementation of procedure device_destroy [2023-11-19 04:57:15,627 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2023-11-19 04:57:15,627 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2023-11-19 04:57:15,627 INFO L130 BoogieDeclarations]: Found specification of procedure pt_probe [2023-11-19 04:57:15,627 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_probe [2023-11-19 04:57:15,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:57:15,628 INFO L130 BoogieDeclarations]: Found specification of procedure pt_rewind [2023-11-19 04:57:15,628 INFO L138 BoogieDeclarations]: Found implementation of procedure pt_rewind [2023-11-19 04:57:15,628 INFO L130 BoogieDeclarations]: Found specification of procedure device_create [2023-11-19 04:57:15,628 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create [2023-11-19 04:57:15,628 INFO L130 BoogieDeclarations]: Found specification of procedure xn [2023-11-19 04:57:15,628 INFO L138 BoogieDeclarations]: Found implementation of procedure xn [2023-11-19 04:57:15,629 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-19 04:57:15,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-19 04:57:15,629 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2023-11-19 04:57:15,629 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2023-11-19 04:57:15,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:57:15,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:57:15,630 INFO L130 BoogieDeclarations]: Found specification of procedure xs [2023-11-19 04:57:15,630 INFO L138 BoogieDeclarations]: Found implementation of procedure xs [2023-11-19 04:57:15,630 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-11-19 04:57:15,630 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-11-19 04:57:16,082 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:57:16,092 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:57:16,250 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-19 04:57:23,566 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:57:24,369 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:57:24,369 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-19 04:57:24,385 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:57:24 BoogieIcfgContainer [2023-11-19 04:57:24,385 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:57:24,389 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:57:24,389 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:57:24,392 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:57:24,392 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:57:13" (1/3) ... [2023-11-19 04:57:24,393 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b86d756 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:57:24, skipping insertion in model container [2023-11-19 04:57:24,393 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:57:15" (2/3) ... [2023-11-19 04:57:24,395 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b86d756 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:57:24, skipping insertion in model container [2023-11-19 04:57:24,395 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:57:24" (3/3) ... [2023-11-19 04:57:24,396 INFO L112 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--block--paride--pt.ko-entry_point.cil.out.i [2023-11-19 04:57:24,446 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:57:24,446 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:57:24,535 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:57:24,542 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;@50b37c02, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:57:24,543 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:57:24,553 INFO L276 IsEmpty]: Start isEmpty. Operand has 632 states, 392 states have (on average 1.3545918367346939) internal successors, (531), 411 states have internal predecessors, (531), 196 states have call successors, (196), 47 states have call predecessors, (196), 46 states have return successors, (193), 193 states have call predecessors, (193), 193 states have call successors, (193) [2023-11-19 04:57:24,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-19 04:57:24,601 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:24,602 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:57:24,602 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:57:24,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:24,610 INFO L85 PathProgramCache]: Analyzing trace with hash 117666857, now seen corresponding path program 1 times [2023-11-19 04:57:24,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:24,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896308944] [2023-11-19 04:57:24,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:24,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-19 04:57:25,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:25,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896308944] [2023-11-19 04:57:25,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896308944] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:57:25,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:57:25,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:57:25,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074454090] [2023-11-19 04:57:25,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:57:25,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:57:25,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:25,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:57:25,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:57:25,720 INFO L87 Difference]: Start difference. First operand has 632 states, 392 states have (on average 1.3545918367346939) internal successors, (531), 411 states have internal predecessors, (531), 196 states have call successors, (196), 47 states have call predecessors, (196), 46 states have return successors, (193), 193 states have call predecessors, (193), 193 states have call successors, (193) Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 04:57:27,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:57:27,725 INFO L93 Difference]: Finished difference Result 1547 states and 2270 transitions. [2023-11-19 04:57:27,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:57:27,728 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 105 [2023-11-19 04:57:27,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:57:27,758 INFO L225 Difference]: With dead ends: 1547 [2023-11-19 04:57:27,758 INFO L226 Difference]: Without dead ends: 886 [2023-11-19 04:57:27,790 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 [2023-11-19 04:57:27,794 INFO L413 NwaCegarLoop]: 978 mSDtfsCounter, 440 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 1727 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:57:27,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 1727 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-19 04:57:27,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2023-11-19 04:57:27,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 886. [2023-11-19 04:57:27,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 545 states have (on average 1.3302752293577982) internal successors, (725), 561 states have internal predecessors, (725), 268 states have call successors, (268), 73 states have call predecessors, (268), 72 states have return successors, (267), 267 states have call predecessors, (267), 267 states have call successors, (267) [2023-11-19 04:57:27,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1260 transitions. [2023-11-19 04:57:27,972 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1260 transitions. Word has length 105 [2023-11-19 04:57:27,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:57:27,974 INFO L495 AbstractCegarLoop]: Abstraction has 886 states and 1260 transitions. [2023-11-19 04:57:27,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-19 04:57:27,974 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1260 transitions. [2023-11-19 04:57:27,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-11-19 04:57:27,987 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:27,987 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:57:27,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:57:27,988 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:57:27,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:27,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1029022478, now seen corresponding path program 1 times [2023-11-19 04:57:27,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:27,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15880564] [2023-11-19 04:57:27,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:27,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:28,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-19 04:57:28,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:28,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15880564] [2023-11-19 04:57:28,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15880564] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:57:28,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:57:28,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:57:28,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884631367] [2023-11-19 04:57:28,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:57:28,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:57:28,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:28,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:57:28,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:57:28,851 INFO L87 Difference]: Start difference. First operand 886 states and 1260 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-19 04:57:30,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:57:30,487 INFO L93 Difference]: Finished difference Result 1771 states and 2530 transitions. [2023-11-19 04:57:30,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:57:30,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 142 [2023-11-19 04:57:30,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:57:30,501 INFO L225 Difference]: With dead ends: 1771 [2023-11-19 04:57:30,501 INFO L226 Difference]: Without dead ends: 910 [2023-11-19 04:57:30,506 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 [2023-11-19 04:57:30,508 INFO L413 NwaCegarLoop]: 758 mSDtfsCounter, 12 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1512 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:57:30,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 1512 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-19 04:57:30,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2023-11-19 04:57:30,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 888. [2023-11-19 04:57:30,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 547 states have (on average 1.3290676416819014) internal successors, (727), 563 states have internal predecessors, (727), 268 states have call successors, (268), 73 states have call predecessors, (268), 72 states have return successors, (267), 267 states have call predecessors, (267), 267 states have call successors, (267) [2023-11-19 04:57:30,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1262 transitions. [2023-11-19 04:57:30,578 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1262 transitions. Word has length 142 [2023-11-19 04:57:30,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:57:30,579 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1262 transitions. [2023-11-19 04:57:30,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-19 04:57:30,580 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1262 transitions. [2023-11-19 04:57:30,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-19 04:57:30,587 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:30,588 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:57:30,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:57:30,588 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:57:30,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:30,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1689884741, now seen corresponding path program 1 times [2023-11-19 04:57:30,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:30,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690192332] [2023-11-19 04:57:30,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:30,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-19 04:57:31,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:31,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690192332] [2023-11-19 04:57:31,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690192332] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:57:31,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:57:31,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:57:31,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298803501] [2023-11-19 04:57:31,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:57:31,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:57:31,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:31,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:57:31,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:57:31,173 INFO L87 Difference]: Start difference. First operand 888 states and 1262 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-19 04:57:33,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:57:33,124 INFO L93 Difference]: Finished difference Result 1769 states and 2524 transitions. [2023-11-19 04:57:33,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:57:33,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 146 [2023-11-19 04:57:33,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:57:33,134 INFO L225 Difference]: With dead ends: 1769 [2023-11-19 04:57:33,134 INFO L226 Difference]: Without dead ends: 906 [2023-11-19 04:57:33,138 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 [2023-11-19 04:57:33,140 INFO L413 NwaCegarLoop]: 765 mSDtfsCounter, 12 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1510 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-19 04:57:33,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 1510 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-19 04:57:33,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2023-11-19 04:57:33,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 898. [2023-11-19 04:57:33,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 557 states have (on average 1.333931777378815) internal successors, (743), 573 states have internal predecessors, (743), 268 states have call successors, (268), 73 states have call predecessors, (268), 72 states have return successors, (267), 267 states have call predecessors, (267), 267 states have call successors, (267) [2023-11-19 04:57:33,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1278 transitions. [2023-11-19 04:57:33,195 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1278 transitions. Word has length 146 [2023-11-19 04:57:33,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:57:33,196 INFO L495 AbstractCegarLoop]: Abstraction has 898 states and 1278 transitions. [2023-11-19 04:57:33,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-19 04:57:33,196 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1278 transitions. [2023-11-19 04:57:33,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-19 04:57:33,202 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:33,203 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:57:33,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:57:33,203 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:57:33,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:33,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1291520662, now seen corresponding path program 1 times [2023-11-19 04:57:33,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:33,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085785319] [2023-11-19 04:57:33,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:33,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:33,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:33,951 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-19 04:57:33,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:33,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085785319] [2023-11-19 04:57:33,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085785319] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:57:33,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238191810] [2023-11-19 04:57:33,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:33,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:57:33,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:57:33,963 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:57:34,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:57:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:35,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 2148 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:57:35,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:57:35,128 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-19 04:57:35,129 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:57:35,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238191810] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:57:35,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:57:35,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-19 04:57:35,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74320133] [2023-11-19 04:57:35,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:57:35,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:57:35,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:35,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:57:35,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:57:35,133 INFO L87 Difference]: Start difference. First operand 898 states and 1278 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2023-11-19 04:57:37,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:57:37,022 INFO L93 Difference]: Finished difference Result 1783 states and 2545 transitions. [2023-11-19 04:57:37,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:57:37,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 151 [2023-11-19 04:57:37,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:57:37,031 INFO L225 Difference]: With dead ends: 1783 [2023-11-19 04:57:37,031 INFO L226 Difference]: Without dead ends: 910 [2023-11-19 04:57:37,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:57:37,037 INFO L413 NwaCegarLoop]: 760 mSDtfsCounter, 9 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:57:37,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 1513 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-19 04:57:37,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2023-11-19 04:57:37,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 900. [2023-11-19 04:57:37,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 559 states have (on average 1.332737030411449) internal successors, (745), 575 states have internal predecessors, (745), 268 states have call successors, (268), 73 states have call predecessors, (268), 72 states have return successors, (267), 267 states have call predecessors, (267), 267 states have call successors, (267) [2023-11-19 04:57:37,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 1280 transitions. [2023-11-19 04:57:37,100 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 1280 transitions. Word has length 151 [2023-11-19 04:57:37,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:57:37,100 INFO L495 AbstractCegarLoop]: Abstraction has 900 states and 1280 transitions. [2023-11-19 04:57:37,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2023-11-19 04:57:37,101 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 1280 transitions. [2023-11-19 04:57:37,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-11-19 04:57:37,108 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:37,109 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:57:37,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:57:37,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:57:37,323 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:57:37,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:37,324 INFO L85 PathProgramCache]: Analyzing trace with hash 133846681, now seen corresponding path program 1 times [2023-11-19 04:57:37,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:37,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113386942] [2023-11-19 04:57:37,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:37,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:37,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:38,046 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-19 04:57:38,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:38,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113386942] [2023-11-19 04:57:38,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113386942] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:57:38,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435352079] [2023-11-19 04:57:38,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:38,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:57:38,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:57:38,048 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:57:38,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:57:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:39,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 2155 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:57:39,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:57:39,188 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 04:57:39,188 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:57:39,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435352079] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:57:39,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:57:39,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-19 04:57:39,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802946494] [2023-11-19 04:57:39,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:57:39,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:57:39,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:39,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:57:39,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:57:39,191 INFO L87 Difference]: Start difference. First operand 900 states and 1280 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-11-19 04:57:41,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:57:41,112 INFO L93 Difference]: Finished difference Result 1821 states and 2606 transitions. [2023-11-19 04:57:41,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:57:41,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 154 [2023-11-19 04:57:41,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:57:41,121 INFO L225 Difference]: With dead ends: 1821 [2023-11-19 04:57:41,121 INFO L226 Difference]: Without dead ends: 946 [2023-11-19 04:57:41,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:57:41,126 INFO L413 NwaCegarLoop]: 764 mSDtfsCounter, 15 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:57:41,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1516 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-19 04:57:41,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2023-11-19 04:57:41,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 944. [2023-11-19 04:57:41,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 591 states have (on average 1.3417935702199661) internal successors, (793), 607 states have internal predecessors, (793), 280 states have call successors, (280), 73 states have call predecessors, (280), 72 states have return successors, (279), 279 states have call predecessors, (279), 279 states have call successors, (279) [2023-11-19 04:57:41,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1352 transitions. [2023-11-19 04:57:41,178 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1352 transitions. Word has length 154 [2023-11-19 04:57:41,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:57:41,179 INFO L495 AbstractCegarLoop]: Abstraction has 944 states and 1352 transitions. [2023-11-19 04:57:41,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2023-11-19 04:57:41,179 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1352 transitions. [2023-11-19 04:57:41,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-19 04:57:41,186 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:41,186 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:57:41,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:57:41,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:57:41,399 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:57:41,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:41,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1429836443, now seen corresponding path program 1 times [2023-11-19 04:57:41,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:41,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532692323] [2023-11-19 04:57:41,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:41,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:41,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-19 04:57:42,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:42,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532692323] [2023-11-19 04:57:42,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532692323] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:57:42,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742548724] [2023-11-19 04:57:42,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:42,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:57:42,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:57:42,107 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:57:42,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:57:43,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:43,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 2172 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:57:43,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:57:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-19 04:57:43,248 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:57:43,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742548724] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:57:43,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:57:43,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-19 04:57:43,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697842972] [2023-11-19 04:57:43,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:57:43,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:57:43,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:57:43,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:57:43,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:57:43,253 INFO L87 Difference]: Start difference. First operand 944 states and 1352 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-11-19 04:57:45,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:57:45,344 INFO L93 Difference]: Finished difference Result 1869 states and 2715 transitions. [2023-11-19 04:57:45,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:57:45,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 158 [2023-11-19 04:57:45,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:57:45,412 INFO L225 Difference]: With dead ends: 1869 [2023-11-19 04:57:45,412 INFO L226 Difference]: Without dead ends: 950 [2023-11-19 04:57:45,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:57:45,419 INFO L413 NwaCegarLoop]: 762 mSDtfsCounter, 2 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1517 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:57:45,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1517 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-19 04:57:45,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2023-11-19 04:57:45,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 946. [2023-11-19 04:57:45,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 593 states have (on average 1.3406408094435076) internal successors, (795), 609 states have internal predecessors, (795), 280 states have call successors, (280), 73 states have call predecessors, (280), 72 states have return successors, (279), 279 states have call predecessors, (279), 279 states have call successors, (279) [2023-11-19 04:57:45,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1354 transitions. [2023-11-19 04:57:45,486 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1354 transitions. Word has length 158 [2023-11-19 04:57:45,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:57:45,487 INFO L495 AbstractCegarLoop]: Abstraction has 946 states and 1354 transitions. [2023-11-19 04:57:45,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2023-11-19 04:57:45,488 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1354 transitions. [2023-11-19 04:57:45,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-11-19 04:57:45,497 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:57:45,498 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:57:45,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:57:45,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:57:45,711 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:57:45,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:57:45,712 INFO L85 PathProgramCache]: Analyzing trace with hash 893853876, now seen corresponding path program 1 times [2023-11-19 04:57:45,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:57:45,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801722258] [2023-11-19 04:57:45,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:45,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:57:46,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-19 04:57:46,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:57:46,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801722258] [2023-11-19 04:57:46,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801722258] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:57:46,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161294491] [2023-11-19 04:57:46,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:57:46,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:57:46,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:57:46,428 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:57:46,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecfae7e6-f6a3-4681-9f3f-4c26e757fe62/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:57:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:57:47,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 2566 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:57:47,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:57:47,772 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-11-19 04:57:47,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:57:48,071 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-19 04:57:48,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161294491] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:57:48,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [656408378] [2023-11-19 04:57:48,100 INFO L159 IcfgInterpreter]: Started Sifa with 139 locations of interest [2023-11-19 04:57:48,101 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:57:48,105 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:57:48,112 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:57:48,112 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs