./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--net--ethernet--realtek--atp.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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/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_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--realtek--atp.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/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_ed3d3415-aae8-4de3-984a-9ce417c35be0/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 b615ef3e9ec848bbbdbcac9993fc5d609594ef1caaa279a862c4f038e6ec482e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:58:11,305 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:58:11,419 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-19 04:58:11,427 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:58:11,430 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:58:11,461 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:58:11,462 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:58:11,463 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:58:11,464 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:58:11,469 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:58:11,469 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:58:11,471 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:58:11,471 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:58:11,473 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:58:11,473 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:58:11,474 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:58:11,474 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:58:11,475 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:58:11,475 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:58:11,476 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:58:11,476 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:58:11,477 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:58:11,478 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:58:11,478 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:58:11,478 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:58:11,479 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:58:11,479 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:58:11,479 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:58:11,480 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:58:11,480 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:58:11,481 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:58:11,482 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:58:11,482 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:58:11,482 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:58:11,482 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:58:11,483 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:58:11,483 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:58:11,483 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:58:11,483 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:58:11,484 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:58:11,484 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:58:11,485 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:58:11,485 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_ed3d3415-aae8-4de3-984a-9ce417c35be0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b615ef3e9ec848bbbdbcac9993fc5d609594ef1caaa279a862c4f038e6ec482e [2023-11-19 04:58:11,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:58:11,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:58:11,849 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:58:11,850 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:58:11,851 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:58:11,852 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--realtek--atp.ko-entry_point.cil.out.i [2023-11-19 04:58:15,020 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:58:15,651 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:58:15,652 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--realtek--atp.ko-entry_point.cil.out.i [2023-11-19 04:58:15,703 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/data/20e5313d3/d9cbc2cdb8454c51934ecfa90a47d471/FLAG83d8c3f1b [2023-11-19 04:58:15,727 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/data/20e5313d3/d9cbc2cdb8454c51934ecfa90a47d471 [2023-11-19 04:58:15,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:58:15,734 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:58:15,739 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:58:15,739 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:58:15,744 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:58:15,747 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:58:15" (1/1) ... [2023-11-19 04:58:15,748 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cf5536e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:15, skipping insertion in model container [2023-11-19 04:58:15,748 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:58:15" (1/1) ... [2023-11-19 04:58:15,891 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:58:17,410 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_ed3d3415-aae8-4de3-984a-9ce417c35be0/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--realtek--atp.ko-entry_point.cil.out.i[208194,208207] [2023-11-19 04:58:17,461 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:58:17,497 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:58:17,631 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; bts %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [5300] [2023-11-19 04:58:17,633 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; btr %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr)); [5307] [2023-11-19 04:58:17,650 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("outb %b0, %w1": : "a" (value), "Nd" (port)); [5446] [2023-11-19 04:58:17,650 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("inb %w1, %b0": "=a" (value): "Nd" (port)); [5454] [2023-11-19 04:58:17,659 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("inb %w1,%b0": "=a" (_v): "d" (port)); [5637] [2023-11-19 04:58:17,772 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_ed3d3415-aae8-4de3-984a-9ce417c35be0/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--realtek--atp.ko-entry_point.cil.out.i[208194,208207] [2023-11-19 04:58:17,788 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:58:17,972 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:58:17,973 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:17 WrapperNode [2023-11-19 04:58:17,973 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:58:17,976 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:58:17,976 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:58:17,976 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:58:17,984 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:17" (1/1) ... [2023-11-19 04:58:18,069 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:17" (1/1) ... [2023-11-19 04:58:18,179 INFO L138 Inliner]: procedures = 151, calls = 711, calls flagged for inlining = 70, calls inlined = 67, statements flattened = 1994 [2023-11-19 04:58:18,180 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:58:18,181 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:58:18,181 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:58:18,181 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:58:18,191 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:17" (1/1) ... [2023-11-19 04:58:18,191 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:17" (1/1) ... [2023-11-19 04:58:18,208 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:17" (1/1) ... [2023-11-19 04:58:18,209 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:17" (1/1) ... [2023-11-19 04:58:18,284 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:17" (1/1) ... [2023-11-19 04:58:18,297 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:17" (1/1) ... [2023-11-19 04:58:18,315 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:17" (1/1) ... [2023-11-19 04:58:18,413 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:17" (1/1) ... [2023-11-19 04:58:18,458 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:58:18,460 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:58:18,460 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:58:18,461 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:58:18,462 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:17" (1/1) ... [2023-11-19 04:58:18,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:58:18,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:18,498 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:58:18,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:58:18,543 INFO L130 BoogieDeclarations]: Found specification of procedure atp_probe1 [2023-11-19 04:58:18,544 INFO L138 BoogieDeclarations]: Found implementation of procedure atp_probe1 [2023-11-19 04:58:18,545 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2023-11-19 04:58:18,546 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2023-11-19 04:58:18,546 INFO L130 BoogieDeclarations]: Found specification of procedure read_block [2023-11-19 04:58:18,546 INFO L138 BoogieDeclarations]: Found implementation of procedure read_block [2023-11-19 04:58:18,547 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-19 04:58:18,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-19 04:58:18,547 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:58:18,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-19 04:58:18,547 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-19 04:58:18,547 INFO L130 BoogieDeclarations]: Found specification of procedure set_rx_mode [2023-11-19 04:58:18,548 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rx_mode [2023-11-19 04:58:18,548 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2023-11-19 04:58:18,548 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2023-11-19 04:58:18,548 INFO L130 BoogieDeclarations]: Found specification of procedure write_byte_mode0 [2023-11-19 04:58:18,549 INFO L138 BoogieDeclarations]: Found implementation of procedure write_byte_mode0 [2023-11-19 04:58:18,549 INFO L130 BoogieDeclarations]: Found specification of procedure write_byte_mode1 [2023-11-19 04:58:18,549 INFO L138 BoogieDeclarations]: Found implementation of procedure write_byte_mode1 [2023-11-19 04:58:18,549 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2023-11-19 04:58:18,549 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2023-11-19 04:58:18,549 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2023-11-19 04:58:18,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2023-11-19 04:58:18,551 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-19 04:58:18,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-19 04:58:18,551 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2023-11-19 04:58:18,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2023-11-19 04:58:18,552 INFO L130 BoogieDeclarations]: Found specification of procedure tx_timeout [2023-11-19 04:58:18,552 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_timeout [2023-11-19 04:58:18,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:58:18,553 INFO L130 BoogieDeclarations]: Found specification of procedure net_rx [2023-11-19 04:58:18,553 INFO L138 BoogieDeclarations]: Found implementation of procedure net_rx [2023-11-19 04:58:18,553 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-19 04:58:18,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-19 04:58:18,554 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg_high [2023-11-19 04:58:18,554 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg_high [2023-11-19 04:58:18,554 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-19 04:58:18,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-19 04:58:18,554 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 04:58:18,555 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 04:58:18,555 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2023-11-19 04:58:18,555 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2023-11-19 04:58:18,555 INFO L130 BoogieDeclarations]: Found specification of procedure read_nibble [2023-11-19 04:58:18,555 INFO L138 BoogieDeclarations]: Found implementation of procedure read_nibble [2023-11-19 04:58:18,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 04:58:18,555 INFO L130 BoogieDeclarations]: Found specification of procedure hardware_init [2023-11-19 04:58:18,556 INFO L138 BoogieDeclarations]: Found implementation of procedure hardware_init [2023-11-19 04:58:18,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:58:18,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:58:18,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 04:58:18,556 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2023-11-19 04:58:18,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2023-11-19 04:58:18,556 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_2 [2023-11-19 04:58:18,557 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_2 [2023-11-19 04:58:18,557 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2023-11-19 04:58:18,557 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2023-11-19 04:58:18,557 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 04:58:18,557 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2023-11-19 04:58:18,558 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2023-11-19 04:58:18,559 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg_byte [2023-11-19 04:58:18,560 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg_byte [2023-11-19 04:58:18,560 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2023-11-19 04:58:18,560 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2023-11-19 04:58:18,560 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2023-11-19 04:58:18,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2023-11-19 04:58:18,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:58:18,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 04:58:18,561 INFO L130 BoogieDeclarations]: Found specification of procedure inbyte [2023-11-19 04:58:18,561 INFO L138 BoogieDeclarations]: Found implementation of procedure inbyte [2023-11-19 04:58:18,561 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-19 04:58:18,562 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-19 04:58:18,562 INFO L130 BoogieDeclarations]: Found specification of procedure trigger_send [2023-11-19 04:58:18,562 INFO L138 BoogieDeclarations]: Found implementation of procedure trigger_send [2023-11-19 04:58:18,563 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2023-11-19 04:58:18,563 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2023-11-19 04:58:18,563 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2023-11-19 04:58:18,563 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2023-11-19 04:58:18,563 INFO L130 BoogieDeclarations]: Found specification of procedure eth_change_mtu [2023-11-19 04:58:18,563 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_change_mtu [2023-11-19 04:58:18,564 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2023-11-19 04:58:18,564 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2023-11-19 04:58:18,564 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2023-11-19 04:58:18,564 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2023-11-19 04:58:18,565 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2023-11-19 04:58:18,565 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2023-11-19 04:58:18,565 INFO L130 BoogieDeclarations]: Found specification of procedure eeprom_op [2023-11-19 04:58:18,565 INFO L138 BoogieDeclarations]: Found implementation of procedure eeprom_op [2023-11-19 04:58:18,566 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2023-11-19 04:58:18,566 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2023-11-19 04:58:18,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:58:18,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:58:18,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:58:18,954 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:58:18,957 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:58:19,920 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-19 04:58:21,055 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:58:22,140 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:58:22,140 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 04:58:22,156 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:58:22 BoogieIcfgContainer [2023-11-19 04:58:22,157 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:58:22,161 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:58:22,161 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:58:22,164 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:58:22,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:58:15" (1/3) ... [2023-11-19 04:58:22,167 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32d0a04f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:58:22, skipping insertion in model container [2023-11-19 04:58:22,167 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:58:17" (2/3) ... [2023-11-19 04:58:22,169 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32d0a04f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:58:22, skipping insertion in model container [2023-11-19 04:58:22,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:58:22" (3/3) ... [2023-11-19 04:58:22,171 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--realtek--atp.ko-entry_point.cil.out.i [2023-11-19 04:58:22,192 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:58:22,192 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:58:22,283 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:58:22,291 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;@3b422d7a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:58:22,292 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:58:22,304 INFO L276 IsEmpty]: Start isEmpty. Operand has 655 states, 371 states have (on average 1.3234501347708896) internal successors, (491), 386 states have internal predecessors, (491), 243 states have call successors, (243), 40 states have call predecessors, (243), 39 states have return successors, (238), 236 states have call predecessors, (238), 238 states have call successors, (238) [2023-11-19 04:58:22,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2023-11-19 04:58:22,358 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:22,359 INFO L195 NwaCegarLoop]: trace histogram [40, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:58:22,360 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:22,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:22,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1074386232, now seen corresponding path program 1 times [2023-11-19 04:58:22,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:22,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802313863] [2023-11-19 04:58:22,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:22,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:22,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:23,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1654 trivial. 0 not checked. [2023-11-19 04:58:23,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:23,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802313863] [2023-11-19 04:58:23,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802313863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:23,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:58:23,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:58:23,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772119830] [2023-11-19 04:58:23,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:23,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:58:23,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:23,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:58:23,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:58:23,690 INFO L87 Difference]: Start difference. First operand has 655 states, 371 states have (on average 1.3234501347708896) internal successors, (491), 386 states have internal predecessors, (491), 243 states have call successors, (243), 40 states have call predecessors, (243), 39 states have return successors, (238), 236 states have call predecessors, (238), 238 states have call successors, (238) Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2023-11-19 04:58:24,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:24,960 INFO L93 Difference]: Finished difference Result 1951 states and 2913 transitions. [2023-11-19 04:58:24,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:58:24,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) Word has length 266 [2023-11-19 04:58:24,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:24,990 INFO L225 Difference]: With dead ends: 1951 [2023-11-19 04:58:24,990 INFO L226 Difference]: Without dead ends: 1276 [2023-11-19 04:58:25,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:58:25,011 INFO L413 NwaCegarLoop]: 1161 mSDtfsCounter, 951 mSDsluCounter, 3163 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 4324 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:25,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [955 Valid, 4324 Invalid, 531 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 04:58:25,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2023-11-19 04:58:25,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1266. [2023-11-19 04:58:25,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 724 states have (on average 1.3038674033149171) internal successors, (944), 741 states have internal predecessors, (944), 465 states have call successors, (465), 77 states have call predecessors, (465), 76 states have return successors, (464), 459 states have call predecessors, (464), 464 states have call successors, (464) [2023-11-19 04:58:25,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1873 transitions. [2023-11-19 04:58:25,300 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1873 transitions. Word has length 266 [2023-11-19 04:58:25,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:25,311 INFO L495 AbstractCegarLoop]: Abstraction has 1266 states and 1873 transitions. [2023-11-19 04:58:25,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2023-11-19 04:58:25,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1873 transitions. [2023-11-19 04:58:25,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2023-11-19 04:58:25,334 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:25,335 INFO L195 NwaCegarLoop]: trace histogram [33, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:58:25,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:58:25,335 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:25,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:25,336 INFO L85 PathProgramCache]: Analyzing trace with hash -500744386, now seen corresponding path program 1 times [2023-11-19 04:58:25,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:25,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312152095] [2023-11-19 04:58:25,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:25,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:25,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:25,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1150 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1150 trivial. 0 not checked. [2023-11-19 04:58:25,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:25,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312152095] [2023-11-19 04:58:25,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312152095] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:25,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:58:25,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:58:25,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424306628] [2023-11-19 04:58:25,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:25,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:58:25,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:25,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:58:25,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:58:25,904 INFO L87 Difference]: Start difference. First operand 1266 states and 1873 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2023-11-19 04:58:26,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:26,996 INFO L93 Difference]: Finished difference Result 2541 states and 3756 transitions. [2023-11-19 04:58:26,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:58:26,997 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) Word has length 239 [2023-11-19 04:58:26,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:27,008 INFO L225 Difference]: With dead ends: 2541 [2023-11-19 04:58:27,008 INFO L226 Difference]: Without dead ends: 1281 [2023-11-19 04:58:27,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:58:27,017 INFO L413 NwaCegarLoop]: 1143 mSDtfsCounter, 927 mSDsluCounter, 3109 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 931 SdHoareTripleChecker+Valid, 4252 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:27,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [931 Valid, 4252 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 04:58:27,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2023-11-19 04:58:27,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1271. [2023-11-19 04:58:27,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1271 states, 728 states have (on average 1.3021978021978022) internal successors, (948), 745 states have internal predecessors, (948), 465 states have call successors, (465), 78 states have call predecessors, (465), 77 states have return successors, (464), 459 states have call predecessors, (464), 464 states have call successors, (464) [2023-11-19 04:58:27,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1877 transitions. [2023-11-19 04:58:27,133 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1877 transitions. Word has length 239 [2023-11-19 04:58:27,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:27,133 INFO L495 AbstractCegarLoop]: Abstraction has 1271 states and 1877 transitions. [2023-11-19 04:58:27,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2023-11-19 04:58:27,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1877 transitions. [2023-11-19 04:58:27,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2023-11-19 04:58:27,149 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:27,150 INFO L195 NwaCegarLoop]: trace histogram [33, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:58:27,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:58:27,150 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:27,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:27,161 INFO L85 PathProgramCache]: Analyzing trace with hash -732458453, now seen corresponding path program 1 times [2023-11-19 04:58:27,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:27,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441981096] [2023-11-19 04:58:27,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:27,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:27,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:27,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1150 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1150 trivial. 0 not checked. [2023-11-19 04:58:27,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:27,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441981096] [2023-11-19 04:58:27,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441981096] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:27,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:58:27,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:58:27,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829597045] [2023-11-19 04:58:27,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:27,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:58:27,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:27,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:58:27,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:58:27,613 INFO L87 Difference]: Start difference. First operand 1271 states and 1877 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2023-11-19 04:58:28,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:28,664 INFO L93 Difference]: Finished difference Result 2551 states and 3763 transitions. [2023-11-19 04:58:28,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:58:28,665 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) Word has length 240 [2023-11-19 04:58:28,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:28,679 INFO L225 Difference]: With dead ends: 2551 [2023-11-19 04:58:28,679 INFO L226 Difference]: Without dead ends: 1286 [2023-11-19 04:58:28,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:58:28,696 INFO L413 NwaCegarLoop]: 1143 mSDtfsCounter, 925 mSDsluCounter, 3109 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 929 SdHoareTripleChecker+Valid, 4252 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:28,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [929 Valid, 4252 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 04:58:28,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2023-11-19 04:58:28,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1276. [2023-11-19 04:58:28,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 732 states have (on average 1.3005464480874316) internal successors, (952), 749 states have internal predecessors, (952), 465 states have call successors, (465), 79 states have call predecessors, (465), 78 states have return successors, (464), 459 states have call predecessors, (464), 464 states have call successors, (464) [2023-11-19 04:58:28,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 1881 transitions. [2023-11-19 04:58:28,853 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 1881 transitions. Word has length 240 [2023-11-19 04:58:28,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:28,854 INFO L495 AbstractCegarLoop]: Abstraction has 1276 states and 1881 transitions. [2023-11-19 04:58:28,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 3 states have call successors, (38), 3 states have call predecessors, (38), 1 states have return successors, (34), 3 states have call predecessors, (34), 3 states have call successors, (34) [2023-11-19 04:58:28,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 1881 transitions. [2023-11-19 04:58:28,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2023-11-19 04:58:28,871 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:28,871 INFO L195 NwaCegarLoop]: trace histogram [40, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:58:28,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:58:28,872 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:28,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:28,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1653312469, now seen corresponding path program 1 times [2023-11-19 04:58:28,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:28,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539487648] [2023-11-19 04:58:28,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:28,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:29,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1654 trivial. 0 not checked. [2023-11-19 04:58:29,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:29,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539487648] [2023-11-19 04:58:29,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539487648] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:29,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:58:29,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:58:29,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987166895] [2023-11-19 04:58:29,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:29,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:58:29,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:29,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:58:29,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:58:29,393 INFO L87 Difference]: Start difference. First operand 1276 states and 1881 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 3 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2023-11-19 04:58:30,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:30,279 INFO L93 Difference]: Finished difference Result 3015 states and 4421 transitions. [2023-11-19 04:58:30,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:58:30,284 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 3 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) Word has length 265 [2023-11-19 04:58:30,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:30,310 INFO L225 Difference]: With dead ends: 3015 [2023-11-19 04:58:30,311 INFO L226 Difference]: Without dead ends: 1745 [2023-11-19 04:58:30,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:58:30,321 INFO L413 NwaCegarLoop]: 901 mSDtfsCounter, 649 mSDsluCounter, 2627 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 3528 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:30,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [653 Valid, 3528 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 04:58:30,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1745 states. [2023-11-19 04:58:30,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1745 to 1716. [2023-11-19 04:58:30,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 984 states have (on average 1.298780487804878) internal successors, (1278), 1006 states have internal predecessors, (1278), 619 states have call successors, (619), 113 states have call predecessors, (619), 112 states have return successors, (618), 611 states have call predecessors, (618), 618 states have call successors, (618) [2023-11-19 04:58:30,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 2515 transitions. [2023-11-19 04:58:30,493 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 2515 transitions. Word has length 265 [2023-11-19 04:58:30,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:30,493 INFO L495 AbstractCegarLoop]: Abstraction has 1716 states and 2515 transitions. [2023-11-19 04:58:30,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 4 states have internal predecessors, (69), 3 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (42), 3 states have call predecessors, (42), 3 states have call successors, (42) [2023-11-19 04:58:30,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 2515 transitions. [2023-11-19 04:58:30,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2023-11-19 04:58:30,513 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:30,513 INFO L195 NwaCegarLoop]: trace histogram [40, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:58:30,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:58:30,514 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:30,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:30,514 INFO L85 PathProgramCache]: Analyzing trace with hash -437255619, now seen corresponding path program 1 times [2023-11-19 04:58:30,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:30,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81550531] [2023-11-19 04:58:30,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:30,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:31,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1659 trivial. 0 not checked. [2023-11-19 04:58:31,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:31,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81550531] [2023-11-19 04:58:31,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81550531] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:31,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906080902] [2023-11-19 04:58:31,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:31,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:31,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:31,339 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:31,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:58:31,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:31,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 1898 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 04:58:32,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:32,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1654 trivial. 0 not checked. [2023-11-19 04:58:32,146 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:58:32,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906080902] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:32,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:58:32,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2023-11-19 04:58:32,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234488747] [2023-11-19 04:58:32,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:32,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:58:32,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:32,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:58:32,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-11-19 04:58:32,163 INFO L87 Difference]: Start difference. First operand 1716 states and 2515 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (43), 3 states have call predecessors, (43), 2 states have call successors, (43) [2023-11-19 04:58:33,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:33,599 INFO L93 Difference]: Finished difference Result 4096 states and 6003 transitions. [2023-11-19 04:58:33,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 04:58:33,600 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (43), 3 states have call predecessors, (43), 2 states have call successors, (43) Word has length 277 [2023-11-19 04:58:33,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:33,628 INFO L225 Difference]: With dead ends: 4096 [2023-11-19 04:58:33,628 INFO L226 Difference]: Without dead ends: 2826 [2023-11-19 04:58:33,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-11-19 04:58:33,639 INFO L413 NwaCegarLoop]: 1144 mSDtfsCounter, 952 mSDsluCounter, 5413 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 956 SdHoareTripleChecker+Valid, 6557 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:33,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [956 Valid, 6557 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 04:58:33,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2023-11-19 04:58:33,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2793. [2023-11-19 04:58:33,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2793 states, 1604 states have (on average 1.2998753117206983) internal successors, (2085), 1644 states have internal predecessors, (2085), 1002 states have call successors, (1002), 185 states have call predecessors, (1002), 186 states have return successors, (1006), 987 states have call predecessors, (1006), 1001 states have call successors, (1006) [2023-11-19 04:58:34,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2793 states to 2793 states and 4093 transitions. [2023-11-19 04:58:34,014 INFO L78 Accepts]: Start accepts. Automaton has 2793 states and 4093 transitions. Word has length 277 [2023-11-19 04:58:34,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:34,016 INFO L495 AbstractCegarLoop]: Abstraction has 2793 states and 4093 transitions. [2023-11-19 04:58:34,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (43), 3 states have call predecessors, (43), 2 states have call successors, (43) [2023-11-19 04:58:34,016 INFO L276 IsEmpty]: Start isEmpty. Operand 2793 states and 4093 transitions. [2023-11-19 04:58:34,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-11-19 04:58:34,043 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:34,043 INFO L195 NwaCegarLoop]: trace histogram [33, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:58:34,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:34,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:34,268 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:34,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:34,269 INFO L85 PathProgramCache]: Analyzing trace with hash 774686629, now seen corresponding path program 1 times [2023-11-19 04:58:34,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:34,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775553264] [2023-11-19 04:58:34,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:34,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:34,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1150 trivial. 0 not checked. [2023-11-19 04:58:34,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:34,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775553264] [2023-11-19 04:58:34,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775553264] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:34,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251107052] [2023-11-19 04:58:34,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:34,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:34,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:34,994 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:35,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:58:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:35,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 1793 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 04:58:35,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:35,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1150 trivial. 0 not checked. [2023-11-19 04:58:35,809 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:58:35,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251107052] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:35,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:58:35,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2023-11-19 04:58:35,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900789250] [2023-11-19 04:58:35,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:35,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:58:35,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:35,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:58:35,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-11-19 04:58:35,814 INFO L87 Difference]: Start difference. First operand 2793 states and 4093 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (35), 3 states have call predecessors, (35), 2 states have call successors, (35) [2023-11-19 04:58:37,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:37,332 INFO L93 Difference]: Finished difference Result 6261 states and 9169 transitions. [2023-11-19 04:58:37,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 04:58:37,333 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (35), 3 states have call predecessors, (35), 2 states have call successors, (35) Word has length 250 [2023-11-19 04:58:37,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:37,370 INFO L225 Difference]: With dead ends: 6261 [2023-11-19 04:58:37,371 INFO L226 Difference]: Without dead ends: 3914 [2023-11-19 04:58:37,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-11-19 04:58:37,389 INFO L413 NwaCegarLoop]: 1157 mSDtfsCounter, 952 mSDsluCounter, 5453 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 956 SdHoareTripleChecker+Valid, 6610 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:37,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [956 Valid, 6610 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 04:58:37,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3914 states. [2023-11-19 04:58:37,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3914 to 3875. [2023-11-19 04:58:37,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3875 states, 2227 states have (on average 1.2999550965424338) internal successors, (2895), 2288 states have internal predecessors, (2895), 1385 states have call successors, (1385), 257 states have call predecessors, (1385), 262 states have return successors, (1397), 1362 states have call predecessors, (1397), 1384 states have call successors, (1397) [2023-11-19 04:58:37,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3875 states to 3875 states and 5677 transitions. [2023-11-19 04:58:37,845 INFO L78 Accepts]: Start accepts. Automaton has 3875 states and 5677 transitions. Word has length 250 [2023-11-19 04:58:37,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:37,886 INFO L495 AbstractCegarLoop]: Abstraction has 3875 states and 5677 transitions. [2023-11-19 04:58:37,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (35), 3 states have call predecessors, (35), 2 states have call successors, (35) [2023-11-19 04:58:37,886 INFO L276 IsEmpty]: Start isEmpty. Operand 3875 states and 5677 transitions. [2023-11-19 04:58:37,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2023-11-19 04:58:37,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:37,925 INFO L195 NwaCegarLoop]: trace histogram [33, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:58:37,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:38,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:38,146 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:38,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:38,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1276137562, now seen corresponding path program 1 times [2023-11-19 04:58:38,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:38,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365245730] [2023-11-19 04:58:38,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:38,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:38,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:38,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1150 trivial. 0 not checked. [2023-11-19 04:58:38,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:38,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365245730] [2023-11-19 04:58:38,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365245730] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:38,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030469438] [2023-11-19 04:58:38,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:38,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:38,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:38,875 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:38,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:58:39,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:39,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 1795 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 04:58:39,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1150 trivial. 0 not checked. [2023-11-19 04:58:39,549 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:58:39,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030469438] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:39,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:58:39,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2023-11-19 04:58:39,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165577873] [2023-11-19 04:58:39,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:39,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:58:39,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:39,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:58:39,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-11-19 04:58:39,553 INFO L87 Difference]: Start difference. First operand 3875 states and 5677 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (35), 3 states have call predecessors, (35), 2 states have call successors, (35) [2023-11-19 04:58:41,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:41,089 INFO L93 Difference]: Finished difference Result 8423 states and 12333 transitions. [2023-11-19 04:58:41,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 04:58:41,090 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (35), 3 states have call predecessors, (35), 2 states have call successors, (35) Word has length 251 [2023-11-19 04:58:41,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:41,135 INFO L225 Difference]: With dead ends: 8423 [2023-11-19 04:58:41,135 INFO L226 Difference]: Without dead ends: 4994 [2023-11-19 04:58:41,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-11-19 04:58:41,164 INFO L413 NwaCegarLoop]: 1157 mSDtfsCounter, 952 mSDsluCounter, 5453 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 956 SdHoareTripleChecker+Valid, 6610 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:41,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [956 Valid, 6610 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 04:58:41,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4994 states. [2023-11-19 04:58:41,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4994 to 3876. [2023-11-19 04:58:41,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3876 states, 2228 states have (on average 1.2998204667863555) internal successors, (2896), 2288 states have internal predecessors, (2896), 1385 states have call successors, (1385), 257 states have call predecessors, (1385), 262 states have return successors, (1397), 1363 states have call predecessors, (1397), 1384 states have call successors, (1397) [2023-11-19 04:58:41,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3876 states to 3876 states and 5678 transitions. [2023-11-19 04:58:41,559 INFO L78 Accepts]: Start accepts. Automaton has 3876 states and 5678 transitions. Word has length 251 [2023-11-19 04:58:41,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:41,560 INFO L495 AbstractCegarLoop]: Abstraction has 3876 states and 5678 transitions. [2023-11-19 04:58:41,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 5 states have internal predecessors, (76), 3 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (35), 3 states have call predecessors, (35), 2 states have call successors, (35) [2023-11-19 04:58:41,560 INFO L276 IsEmpty]: Start isEmpty. Operand 3876 states and 5678 transitions. [2023-11-19 04:58:41,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-11-19 04:58:41,593 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:41,594 INFO L195 NwaCegarLoop]: trace histogram [33, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:58:41,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:41,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:41,808 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:41,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:41,809 INFO L85 PathProgramCache]: Analyzing trace with hash 924507020, now seen corresponding path program 1 times [2023-11-19 04:58:41,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:41,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265992274] [2023-11-19 04:58:41,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:41,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:42,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1150 trivial. 0 not checked. [2023-11-19 04:58:42,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:42,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265992274] [2023-11-19 04:58:42,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265992274] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:42,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766385898] [2023-11-19 04:58:42,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:42,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:42,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:42,505 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:42,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:58:43,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:43,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 1797 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 04:58:43,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:43,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1150 trivial. 0 not checked. [2023-11-19 04:58:43,148 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:58:43,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766385898] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:43,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:58:43,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2023-11-19 04:58:43,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621000870] [2023-11-19 04:58:43,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:43,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:58:43,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:43,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:58:43,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-11-19 04:58:43,161 INFO L87 Difference]: Start difference. First operand 3876 states and 5678 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 5 states have internal predecessors, (77), 3 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (35), 3 states have call predecessors, (35), 2 states have call successors, (35) [2023-11-19 04:58:44,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:44,701 INFO L93 Difference]: Finished difference Result 8426 states and 12336 transitions. [2023-11-19 04:58:44,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 04:58:44,703 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 5 states have internal predecessors, (77), 3 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (35), 3 states have call predecessors, (35), 2 states have call successors, (35) Word has length 252 [2023-11-19 04:58:44,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:44,839 INFO L225 Difference]: With dead ends: 8426 [2023-11-19 04:58:44,839 INFO L226 Difference]: Without dead ends: 4996 [2023-11-19 04:58:44,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-11-19 04:58:44,864 INFO L413 NwaCegarLoop]: 1157 mSDtfsCounter, 952 mSDsluCounter, 5453 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 956 SdHoareTripleChecker+Valid, 6610 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:44,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [956 Valid, 6610 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 04:58:44,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4996 states. [2023-11-19 04:58:45,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4996 to 3877. [2023-11-19 04:58:45,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3877 states, 2229 states have (on average 1.2996859578286226) internal successors, (2897), 2288 states have internal predecessors, (2897), 1385 states have call successors, (1385), 257 states have call predecessors, (1385), 262 states have return successors, (1397), 1364 states have call predecessors, (1397), 1384 states have call successors, (1397) [2023-11-19 04:58:45,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3877 states to 3877 states and 5679 transitions. [2023-11-19 04:58:45,330 INFO L78 Accepts]: Start accepts. Automaton has 3877 states and 5679 transitions. Word has length 252 [2023-11-19 04:58:45,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:45,331 INFO L495 AbstractCegarLoop]: Abstraction has 3877 states and 5679 transitions. [2023-11-19 04:58:45,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 5 states have internal predecessors, (77), 3 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (35), 3 states have call predecessors, (35), 2 states have call successors, (35) [2023-11-19 04:58:45,331 INFO L276 IsEmpty]: Start isEmpty. Operand 3877 states and 5679 transitions. [2023-11-19 04:58:45,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2023-11-19 04:58:45,365 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:45,366 INFO L195 NwaCegarLoop]: trace histogram [33, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:58:45,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 04:58:45,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:45,580 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:45,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:45,581 INFO L85 PathProgramCache]: Analyzing trace with hash -354936732, now seen corresponding path program 1 times [2023-11-19 04:58:45,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:45,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437912055] [2023-11-19 04:58:45,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:45,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:45,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1154 trivial. 0 not checked. [2023-11-19 04:58:45,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:45,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437912055] [2023-11-19 04:58:45,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437912055] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:58:45,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:58:45,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:58:45,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723217075] [2023-11-19 04:58:45,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:58:45,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:58:45,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:58:45,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:58:45,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:58:45,787 INFO L87 Difference]: Start difference. First operand 3877 states and 5679 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2023-11-19 04:58:46,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:58:46,580 INFO L93 Difference]: Finished difference Result 10335 states and 15133 transitions. [2023-11-19 04:58:46,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:58:46,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 255 [2023-11-19 04:58:46,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:58:46,651 INFO L225 Difference]: With dead ends: 10335 [2023-11-19 04:58:46,651 INFO L226 Difference]: Without dead ends: 6464 [2023-11-19 04:58:46,730 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 04:58:46,731 INFO L413 NwaCegarLoop]: 843 mSDtfsCounter, 684 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 1631 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:58:46,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 1631 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 04:58:46,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6464 states. [2023-11-19 04:58:47,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6464 to 6454. [2023-11-19 04:58:47,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6454 states, 3720 states have (on average 1.2903225806451613) internal successors, (4800), 3818 states have internal predecessors, (4800), 2297 states have call successors, (2297), 425 states have call predecessors, (2297), 436 states have return successors, (2350), 2255 states have call predecessors, (2350), 2296 states have call successors, (2350) [2023-11-19 04:58:47,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6454 states to 6454 states and 9447 transitions. [2023-11-19 04:58:47,260 INFO L78 Accepts]: Start accepts. Automaton has 6454 states and 9447 transitions. Word has length 255 [2023-11-19 04:58:47,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:58:47,261 INFO L495 AbstractCegarLoop]: Abstraction has 6454 states and 9447 transitions. [2023-11-19 04:58:47,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2023-11-19 04:58:47,261 INFO L276 IsEmpty]: Start isEmpty. Operand 6454 states and 9447 transitions. [2023-11-19 04:58:47,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2023-11-19 04:58:47,273 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:58:47,273 INFO L195 NwaCegarLoop]: trace histogram [33, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:58:47,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 04:58:47,274 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:58:47,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:58:47,274 INFO L85 PathProgramCache]: Analyzing trace with hash 478118599, now seen corresponding path program 1 times [2023-11-19 04:58:47,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:58:47,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148912088] [2023-11-19 04:58:47,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:47,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:58:47,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:47,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2023-11-19 04:58:47,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:58:47,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148912088] [2023-11-19 04:58:47,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148912088] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:58:47,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630799606] [2023-11-19 04:58:47,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:58:47,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:58:47,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:58:47,914 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:58:47,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ed3d3415-aae8-4de3-984a-9ce417c35be0/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:58:48,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:58:48,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 1858 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 04:58:48,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:58:48,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2023-11-19 04:58:48,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:58:49,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 1157 trivial. 0 not checked. [2023-11-19 04:58:49,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630799606] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:58:49,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [496553494] [2023-11-19 04:58:49,194 INFO L159 IcfgInterpreter]: Started Sifa with 122 locations of interest [2023-11-19 04:58:49,194 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:58:49,198 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:58:49,203 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:58:49,204 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs