./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 30e01a73 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_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--realtek--atp.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash b615ef3e9ec848bbbdbcac9993fc5d609594ef1caaa279a862c4f038e6ec482e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:37:53,882 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:37:54,003 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 20:37:54,013 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:37:54,014 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:37:54,051 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:37:54,052 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:37:54,053 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:37:54,054 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:37:54,059 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:37:54,059 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:37:54,060 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:37:54,061 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:37:54,062 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:37:54,063 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:37:54,063 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:37:54,064 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:37:54,064 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:37:54,064 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:37:54,065 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:37:54,065 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:37:54,066 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:37:54,067 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:37:54,067 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:37:54,068 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:37:54,068 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:37:54,068 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:37:54,069 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:37:54,069 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:37:54,069 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:37:54,071 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:37:54,071 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:37:54,071 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:37:54,071 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:37:54,072 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:37:54,072 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:37:54,072 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:37:54,072 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:37:54,073 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:37:54,073 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:37:54,073 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:37:54,073 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:37:54,074 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:37:54,074 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:37:54,074 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_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b615ef3e9ec848bbbdbcac9993fc5d609594ef1caaa279a862c4f038e6ec482e [2023-11-23 20:37:54,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:37:54,396 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:37:54,398 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:37:54,400 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:37:54,400 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:37:54,402 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/../../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 [2023-11-23 20:37:57,505 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:37:58,096 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:37:58,097 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/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 [2023-11-23 20:37:58,141 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/data/96b77f3b1/f7a878a4dcaa495ea0de48b9c0e0f4ff/FLAG3c39a59da [2023-11-23 20:37:58,156 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/data/96b77f3b1/f7a878a4dcaa495ea0de48b9c0e0f4ff [2023-11-23 20:37:58,159 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:37:58,161 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:37:58,162 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:37:58,162 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:37:58,168 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:37:58,169 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:37:58" (1/1) ... [2023-11-23 20:37:58,170 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e21560 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:37:58, skipping insertion in model container [2023-11-23 20:37:58,170 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:37:58" (1/1) ... [2023-11-23 20:37:58,274 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:37:59,682 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_ec5a70ea-1843-44f2-88c2-d905587df111/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] [2023-11-23 20:37:59,737 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:37:59,774 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:37:59,956 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] [2023-11-23 20:37:59,958 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] [2023-11-23 20:37:59,964 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("outb %b0, %w1": : "a" (value), "Nd" (port)); [5446] [2023-11-23 20:37:59,964 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("inb %w1, %b0": "=a" (value): "Nd" (port)); [5454] [2023-11-23 20:37:59,972 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("inb %w1,%b0": "=a" (_v): "d" (port)); [5637] [2023-11-23 20:38:00,055 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_ec5a70ea-1843-44f2-88c2-d905587df111/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] [2023-11-23 20:38:00,062 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:38:00,212 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:38:00,213 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:00 WrapperNode [2023-11-23 20:38:00,213 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:38:00,214 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:38:00,214 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:38:00,215 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:38:00,223 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:00" (1/1) ... [2023-11-23 20:38:00,305 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:00" (1/1) ... [2023-11-23 20:38:00,461 INFO L138 Inliner]: procedures = 151, calls = 711, calls flagged for inlining = 70, calls inlined = 67, statements flattened = 1994 [2023-11-23 20:38:00,461 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:38:00,462 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:38:00,462 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:38:00,462 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:38:00,472 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:00" (1/1) ... [2023-11-23 20:38:00,472 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:00" (1/1) ... [2023-11-23 20:38:00,506 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:00" (1/1) ... [2023-11-23 20:38:00,506 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:00" (1/1) ... [2023-11-23 20:38:00,617 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:00" (1/1) ... [2023-11-23 20:38:00,632 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:00" (1/1) ... [2023-11-23 20:38:00,650 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:00" (1/1) ... [2023-11-23 20:38:00,663 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:00" (1/1) ... [2023-11-23 20:38:00,692 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:38:00,693 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:38:00,693 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:38:00,693 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:38:00,694 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:00" (1/1) ... [2023-11-23 20:38:00,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:38:00,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:00,727 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:38:00,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:38:00,771 INFO L130 BoogieDeclarations]: Found specification of procedure atp_probe1 [2023-11-23 20:38:00,772 INFO L138 BoogieDeclarations]: Found implementation of procedure atp_probe1 [2023-11-23 20:38:00,772 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2023-11-23 20:38:00,772 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2023-11-23 20:38:00,772 INFO L130 BoogieDeclarations]: Found specification of procedure read_block [2023-11-23 20:38:00,772 INFO L138 BoogieDeclarations]: Found implementation of procedure read_block [2023-11-23 20:38:00,773 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 20:38:00,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 20:38:00,773 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:38:00,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-23 20:38:00,773 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-23 20:38:00,773 INFO L130 BoogieDeclarations]: Found specification of procedure set_rx_mode [2023-11-23 20:38:00,774 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rx_mode [2023-11-23 20:38:00,774 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2023-11-23 20:38:00,774 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2023-11-23 20:38:00,775 INFO L130 BoogieDeclarations]: Found specification of procedure write_byte_mode0 [2023-11-23 20:38:00,775 INFO L138 BoogieDeclarations]: Found implementation of procedure write_byte_mode0 [2023-11-23 20:38:00,776 INFO L130 BoogieDeclarations]: Found specification of procedure write_byte_mode1 [2023-11-23 20:38:00,776 INFO L138 BoogieDeclarations]: Found implementation of procedure write_byte_mode1 [2023-11-23 20:38:00,776 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2023-11-23 20:38:00,777 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2023-11-23 20:38:00,777 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2023-11-23 20:38:00,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2023-11-23 20:38:00,778 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 20:38:00,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 20:38:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2023-11-23 20:38:00,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2023-11-23 20:38:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure tx_timeout [2023-11-23 20:38:00,779 INFO L138 BoogieDeclarations]: Found implementation of procedure tx_timeout [2023-11-23 20:38:00,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:38:00,780 INFO L130 BoogieDeclarations]: Found specification of procedure net_rx [2023-11-23 20:38:00,780 INFO L138 BoogieDeclarations]: Found implementation of procedure net_rx [2023-11-23 20:38:00,781 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 20:38:00,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 20:38:00,781 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg_high [2023-11-23 20:38:00,781 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg_high [2023-11-23 20:38:00,781 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-23 20:38:00,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-23 20:38:00,782 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 20:38:00,782 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 20:38:00,782 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2023-11-23 20:38:00,782 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2023-11-23 20:38:00,782 INFO L130 BoogieDeclarations]: Found specification of procedure read_nibble [2023-11-23 20:38:00,783 INFO L138 BoogieDeclarations]: Found implementation of procedure read_nibble [2023-11-23 20:38:00,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:38:00,783 INFO L130 BoogieDeclarations]: Found specification of procedure hardware_init [2023-11-23 20:38:00,783 INFO L138 BoogieDeclarations]: Found implementation of procedure hardware_init [2023-11-23 20:38:00,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:38:00,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:38:00,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 20:38:00,784 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2023-11-23 20:38:00,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2023-11-23 20:38:00,784 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_2 [2023-11-23 20:38:00,784 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_2 [2023-11-23 20:38:00,785 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2023-11-23 20:38:00,785 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2023-11-23 20:38:00,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 20:38:00,786 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2023-11-23 20:38:00,787 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2023-11-23 20:38:00,788 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg_byte [2023-11-23 20:38:00,788 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg_byte [2023-11-23 20:38:00,788 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2023-11-23 20:38:00,788 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2023-11-23 20:38:00,788 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2023-11-23 20:38:00,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2023-11-23 20:38:00,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:38:00,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 20:38:00,789 INFO L130 BoogieDeclarations]: Found specification of procedure inbyte [2023-11-23 20:38:00,789 INFO L138 BoogieDeclarations]: Found implementation of procedure inbyte [2023-11-23 20:38:00,789 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-23 20:38:00,790 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-23 20:38:00,790 INFO L130 BoogieDeclarations]: Found specification of procedure trigger_send [2023-11-23 20:38:00,791 INFO L138 BoogieDeclarations]: Found implementation of procedure trigger_send [2023-11-23 20:38:00,791 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2023-11-23 20:38:00,791 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2023-11-23 20:38:00,791 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2023-11-23 20:38:00,791 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2023-11-23 20:38:00,792 INFO L130 BoogieDeclarations]: Found specification of procedure eth_change_mtu [2023-11-23 20:38:00,792 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_change_mtu [2023-11-23 20:38:00,792 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2023-11-23 20:38:00,792 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2023-11-23 20:38:00,793 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2023-11-23 20:38:00,793 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2023-11-23 20:38:00,794 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2023-11-23 20:38:00,794 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2023-11-23 20:38:00,794 INFO L130 BoogieDeclarations]: Found specification of procedure eeprom_op [2023-11-23 20:38:00,794 INFO L138 BoogieDeclarations]: Found implementation of procedure eeprom_op [2023-11-23 20:38:00,794 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2023-11-23 20:38:00,794 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2023-11-23 20:38:00,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:38:00,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:38:00,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:38:01,191 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:38:01,195 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:38:02,165 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 20:38:03,360 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:38:04,372 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:38:04,372 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 20:38:04,374 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:38:04 BoogieIcfgContainer [2023-11-23 20:38:04,375 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:38:04,378 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:38:04,378 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:38:04,381 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:38:04,381 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:37:58" (1/3) ... [2023-11-23 20:38:04,383 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e6c67db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:38:04, skipping insertion in model container [2023-11-23 20:38:04,384 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:38:00" (2/3) ... [2023-11-23 20:38:04,385 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e6c67db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:38:04, skipping insertion in model container [2023-11-23 20:38:04,385 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:38:04" (3/3) ... [2023-11-23 20:38:04,387 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--realtek--atp.ko-entry_point.cil.out.i [2023-11-23 20:38:04,407 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:38:04,407 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:38:04,494 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:38:04,502 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;@7e2b1987, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:38:04,502 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:38:04,513 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) [2023-11-23 20:38:04,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2023-11-23 20:38:04,571 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:04,572 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] [2023-11-23 20:38:04,573 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:04,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:04,582 INFO L85 PathProgramCache]: Analyzing trace with hash 226366870, now seen corresponding path program 1 times [2023-11-23 20:38:04,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:04,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135758175] [2023-11-23 20:38:04,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:04,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:04,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:05,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1654 trivial. 0 not checked. [2023-11-23 20:38:05,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:05,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135758175] [2023-11-23 20:38:05,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135758175] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:05,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:38:05,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:38:05,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156716367] [2023-11-23 20:38:05,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:05,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:38:05,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:05,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:38:05,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:38:05,830 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) [2023-11-23 20:38:07,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:07,009 INFO L93 Difference]: Finished difference Result 1951 states and 2913 transitions. [2023-11-23 20:38:07,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:38:07,012 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 [2023-11-23 20:38:07,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:07,052 INFO L225 Difference]: With dead ends: 1951 [2023-11-23 20:38:07,053 INFO L226 Difference]: Without dead ends: 1276 [2023-11-23 20:38:07,069 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 [2023-11-23 20:38:07,077 INFO L413 NwaCegarLoop]: 1161 mSDtfsCounter, 951 mSDsluCounter, 3163 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:07,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [955 Valid, 4324 Invalid, 531 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 20:38:07,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2023-11-23 20:38:07,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1266. [2023-11-23 20:38:07,313 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) [2023-11-23 20:38:07,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1873 transitions. [2023-11-23 20:38:07,338 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1873 transitions. Word has length 266 [2023-11-23 20:38:07,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:07,341 INFO L495 AbstractCegarLoop]: Abstraction has 1266 states and 1873 transitions. [2023-11-23 20:38:07,342 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) [2023-11-23 20:38:07,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1873 transitions. [2023-11-23 20:38:07,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-11-23 20:38:07,442 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:07,442 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, 1] [2023-11-23 20:38:07,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:38:07,443 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:07,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:07,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1231626932, now seen corresponding path program 1 times [2023-11-23 20:38:07,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:07,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532308856] [2023-11-23 20:38:07,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:07,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:08,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1654 trivial. 0 not checked. [2023-11-23 20:38:08,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:08,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532308856] [2023-11-23 20:38:08,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532308856] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:08,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:38:08,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:38:08,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044328260] [2023-11-23 20:38:08,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:08,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:38:08,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:08,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:38:08,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:38:08,067 INFO L87 Difference]: Start difference. First operand 1266 states and 1873 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 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) [2023-11-23 20:38:09,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:09,153 INFO L93 Difference]: Finished difference Result 2541 states and 3756 transitions. [2023-11-23 20:38:09,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:38:09,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 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 267 [2023-11-23 20:38:09,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:09,168 INFO L225 Difference]: With dead ends: 2541 [2023-11-23 20:38:09,169 INFO L226 Difference]: Without dead ends: 1281 [2023-11-23 20:38:09,178 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 [2023-11-23 20:38:09,180 INFO L413 NwaCegarLoop]: 1143 mSDtfsCounter, 927 mSDsluCounter, 3109 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:09,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [931 Valid, 4252 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 20:38:09,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2023-11-23 20:38:09,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1271. [2023-11-23 20:38:09,308 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) [2023-11-23 20:38:09,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1877 transitions. [2023-11-23 20:38:09,327 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1877 transitions. Word has length 267 [2023-11-23 20:38:09,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:09,328 INFO L495 AbstractCegarLoop]: Abstraction has 1271 states and 1877 transitions. [2023-11-23 20:38:09,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 4 states have internal predecessors, (71), 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) [2023-11-23 20:38:09,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1877 transitions. [2023-11-23 20:38:09,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2023-11-23 20:38:09,345 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:09,346 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] [2023-11-23 20:38:09,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:38:09,346 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:09,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:09,347 INFO L85 PathProgramCache]: Analyzing trace with hash 787444076, now seen corresponding path program 1 times [2023-11-23 20:38:09,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:09,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518142100] [2023-11-23 20:38:09,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:09,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:09,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:09,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1150 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1150 trivial. 0 not checked. [2023-11-23 20:38:09,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:09,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518142100] [2023-11-23 20:38:09,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518142100] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:09,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:38:09,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:38:09,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092665810] [2023-11-23 20:38:09,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:09,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:38:09,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:09,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:38:09,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:38:09,839 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) [2023-11-23 20:38:10,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:10,850 INFO L93 Difference]: Finished difference Result 2551 states and 3763 transitions. [2023-11-23 20:38:10,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:38:10,851 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 [2023-11-23 20:38:10,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:10,864 INFO L225 Difference]: With dead ends: 2551 [2023-11-23 20:38:10,864 INFO L226 Difference]: Without dead ends: 1286 [2023-11-23 20:38:10,872 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 [2023-11-23 20:38:10,874 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 [2023-11-23 20:38:10,874 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] [2023-11-23 20:38:10,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2023-11-23 20:38:10,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1276. [2023-11-23 20:38:10,990 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) [2023-11-23 20:38:11,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 1881 transitions. [2023-11-23 20:38:11,010 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 1881 transitions. Word has length 240 [2023-11-23 20:38:11,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:11,010 INFO L495 AbstractCegarLoop]: Abstraction has 1276 states and 1881 transitions. [2023-11-23 20:38:11,011 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) [2023-11-23 20:38:11,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 1881 transitions. [2023-11-23 20:38:11,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2023-11-23 20:38:11,026 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:11,026 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] [2023-11-23 20:38:11,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:38:11,028 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:11,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:11,029 INFO L85 PathProgramCache]: Analyzing trace with hash -751405041, now seen corresponding path program 1 times [2023-11-23 20:38:11,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:11,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597178644] [2023-11-23 20:38:11,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:11,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:11,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1654 trivial. 0 not checked. [2023-11-23 20:38:11,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:11,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597178644] [2023-11-23 20:38:11,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597178644] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:11,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:38:11,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:38:11,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793161067] [2023-11-23 20:38:11,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:11,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:38:11,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:11,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:38:11,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:38:11,586 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) [2023-11-23 20:38:12,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:12,445 INFO L93 Difference]: Finished difference Result 3015 states and 4421 transitions. [2023-11-23 20:38:12,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:38:12,446 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 [2023-11-23 20:38:12,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:12,461 INFO L225 Difference]: With dead ends: 3015 [2023-11-23 20:38:12,461 INFO L226 Difference]: Without dead ends: 1745 [2023-11-23 20:38:12,470 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 [2023-11-23 20:38:12,471 INFO L413 NwaCegarLoop]: 901 mSDtfsCounter, 649 mSDsluCounter, 2627 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 20:38:12,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [653 Valid, 3528 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 20:38:12,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1745 states. [2023-11-23 20:38:12,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1745 to 1716. [2023-11-23 20:38:12,625 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) [2023-11-23 20:38:12,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 2515 transitions. [2023-11-23 20:38:12,651 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 2515 transitions. Word has length 265 [2023-11-23 20:38:12,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:12,652 INFO L495 AbstractCegarLoop]: Abstraction has 1716 states and 2515 transitions. [2023-11-23 20:38:12,652 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) [2023-11-23 20:38:12,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 2515 transitions. [2023-11-23 20:38:12,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-11-23 20:38:12,669 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:12,670 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, 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] [2023-11-23 20:38:12,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 20:38:12,670 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:12,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:12,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1389759654, now seen corresponding path program 1 times [2023-11-23 20:38:12,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:12,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582551098] [2023-11-23 20:38:12,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:12,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:12,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:13,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2023-11-23 20:38:13,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:13,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582551098] [2023-11-23 20:38:13,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582551098] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:38:13,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325590887] [2023-11-23 20:38:13,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:13,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:13,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:13,476 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:38:13,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:38:14,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:14,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 1787 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 20:38:14,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:38:14,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1150 trivial. 0 not checked. [2023-11-23 20:38:14,323 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:38:14,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325590887] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:14,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:38:14,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2023-11-23 20:38:14,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159568029] [2023-11-23 20:38:14,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:14,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:38:14,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:14,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:38:14,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-11-23 20:38:14,326 INFO L87 Difference]: Start difference. First operand 1716 states and 2515 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 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) [2023-11-23 20:38:15,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:15,800 INFO L93 Difference]: Finished difference Result 4096 states and 6003 transitions. [2023-11-23 20:38:15,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 20:38:15,801 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 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 249 [2023-11-23 20:38:15,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:15,860 INFO L225 Difference]: With dead ends: 4096 [2023-11-23 20:38:15,860 INFO L226 Difference]: Without dead ends: 2826 [2023-11-23 20:38:15,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-11-23 20:38:15,871 INFO L413 NwaCegarLoop]: 1144 mSDtfsCounter, 952 mSDsluCounter, 5413 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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 [2023-11-23 20:38:15,872 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] [2023-11-23 20:38:15,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2023-11-23 20:38:16,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2793. [2023-11-23 20:38:16,204 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) [2023-11-23 20:38:16,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2793 states to 2793 states and 4093 transitions. [2023-11-23 20:38:16,237 INFO L78 Accepts]: Start accepts. Automaton has 2793 states and 4093 transitions. Word has length 249 [2023-11-23 20:38:16,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:16,237 INFO L495 AbstractCegarLoop]: Abstraction has 2793 states and 4093 transitions. [2023-11-23 20:38:16,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 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) [2023-11-23 20:38:16,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2793 states and 4093 transitions. [2023-11-23 20:38:16,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-11-23 20:38:16,267 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:16,268 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] [2023-11-23 20:38:16,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:38:16,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:16,492 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:16,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:16,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1916030298, now seen corresponding path program 1 times [2023-11-23 20:38:16,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:16,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736061197] [2023-11-23 20:38:16,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:16,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:16,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:17,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1150 trivial. 0 not checked. [2023-11-23 20:38:17,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:17,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736061197] [2023-11-23 20:38:17,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736061197] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:38:17,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782280620] [2023-11-23 20:38:17,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:17,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:17,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:17,323 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:38:17,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:38:17,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:17,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 1789 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 20:38:17,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:38:18,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1150 trivial. 0 not checked. [2023-11-23 20:38:18,056 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:38:18,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782280620] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:18,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:38:18,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2023-11-23 20:38:18,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103862299] [2023-11-23 20:38:18,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:18,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:38:18,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:18,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:38:18,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-11-23 20:38:18,062 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) [2023-11-23 20:38:19,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:19,545 INFO L93 Difference]: Finished difference Result 6261 states and 9169 transitions. [2023-11-23 20:38:19,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 20:38:19,546 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 [2023-11-23 20:38:19,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:19,585 INFO L225 Difference]: With dead ends: 6261 [2023-11-23 20:38:19,585 INFO L226 Difference]: Without dead ends: 3914 [2023-11-23 20:38:19,604 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 [2023-11-23 20:38:19,605 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 [2023-11-23 20:38:19,605 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] [2023-11-23 20:38:19,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3914 states. [2023-11-23 20:38:19,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3914 to 3875. [2023-11-23 20:38:19,991 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) [2023-11-23 20:38:20,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3875 states to 3875 states and 5677 transitions. [2023-11-23 20:38:20,025 INFO L78 Accepts]: Start accepts. Automaton has 3875 states and 5677 transitions. Word has length 250 [2023-11-23 20:38:20,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:20,025 INFO L495 AbstractCegarLoop]: Abstraction has 3875 states and 5677 transitions. [2023-11-23 20:38:20,026 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) [2023-11-23 20:38:20,026 INFO L276 IsEmpty]: Start isEmpty. Operand 3875 states and 5677 transitions. [2023-11-23 20:38:20,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2023-11-23 20:38:20,102 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:20,102 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:38:20,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:38:20,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 20:38:20,316 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:20,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:20,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1480345624, now seen corresponding path program 1 times [2023-11-23 20:38:20,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:20,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695526194] [2023-11-23 20:38:20,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:20,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1660 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1654 trivial. 0 not checked. [2023-11-23 20:38:21,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:21,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695526194] [2023-11-23 20:38:21,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695526194] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:38:21,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292391754] [2023-11-23 20:38:21,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:21,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:21,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:21,176 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:38:21,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:38:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:21,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 1898 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 20:38:21,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:38:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1660 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1654 trivial. 0 not checked. [2023-11-23 20:38:21,903 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:38:21,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292391754] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:21,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:38:21,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2023-11-23 20:38:21,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927947752] [2023-11-23 20:38:21,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:21,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:38:21,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:21,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:38:21,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-11-23 20:38:21,907 INFO L87 Difference]: Start difference. First operand 3875 states and 5677 transitions. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 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) [2023-11-23 20:38:23,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:23,515 INFO L93 Difference]: Finished difference Result 8423 states and 12333 transitions. [2023-11-23 20:38:23,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 20:38:23,516 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 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 279 [2023-11-23 20:38:23,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:23,585 INFO L225 Difference]: With dead ends: 8423 [2023-11-23 20:38:23,585 INFO L226 Difference]: Without dead ends: 4994 [2023-11-23 20:38:23,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-11-23 20:38:23,612 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 [2023-11-23 20:38:23,613 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] [2023-11-23 20:38:23,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4994 states. [2023-11-23 20:38:23,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4994 to 3876. [2023-11-23 20:38:23,976 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) [2023-11-23 20:38:24,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3876 states to 3876 states and 5678 transitions. [2023-11-23 20:38:24,018 INFO L78 Accepts]: Start accepts. Automaton has 3876 states and 5678 transitions. Word has length 279 [2023-11-23 20:38:24,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:24,019 INFO L495 AbstractCegarLoop]: Abstraction has 3876 states and 5678 transitions. [2023-11-23 20:38:24,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 5 states have internal predecessors, (81), 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) [2023-11-23 20:38:24,020 INFO L276 IsEmpty]: Start isEmpty. Operand 3876 states and 5678 transitions. [2023-11-23 20:38:24,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2023-11-23 20:38:24,057 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:24,058 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:38:24,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:38:24,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 20:38:24,280 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:24,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:24,281 INFO L85 PathProgramCache]: Analyzing trace with hash -366722284, now seen corresponding path program 1 times [2023-11-23 20:38:24,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:24,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299892753] [2023-11-23 20:38:24,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:24,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1660 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1654 trivial. 0 not checked. [2023-11-23 20:38:25,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:25,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299892753] [2023-11-23 20:38:25,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299892753] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:38:25,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989856279] [2023-11-23 20:38:25,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:25,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:25,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:25,247 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:38:25,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:38:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:25,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 1900 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 20:38:25,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:38:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1660 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1654 trivial. 0 not checked. [2023-11-23 20:38:25,904 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:38:25,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989856279] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:25,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:38:25,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2023-11-23 20:38:25,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110551876] [2023-11-23 20:38:25,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:25,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:38:25,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:25,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:38:25,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-11-23 20:38:25,908 INFO L87 Difference]: Start difference. First operand 3876 states and 5678 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 5 states have internal predecessors, (82), 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) [2023-11-23 20:38:27,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:27,415 INFO L93 Difference]: Finished difference Result 8426 states and 12336 transitions. [2023-11-23 20:38:27,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 20:38:27,416 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 5 states have internal predecessors, (82), 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 280 [2023-11-23 20:38:27,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:27,465 INFO L225 Difference]: With dead ends: 8426 [2023-11-23 20:38:27,465 INFO L226 Difference]: Without dead ends: 4996 [2023-11-23 20:38:27,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-11-23 20:38:27,490 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 [2023-11-23 20:38:27,490 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] [2023-11-23 20:38:27,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4996 states. [2023-11-23 20:38:27,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4996 to 3877. [2023-11-23 20:38:27,893 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) [2023-11-23 20:38:27,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3877 states to 3877 states and 5679 transitions. [2023-11-23 20:38:27,930 INFO L78 Accepts]: Start accepts. Automaton has 3877 states and 5679 transitions. Word has length 280 [2023-11-23 20:38:27,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:27,933 INFO L495 AbstractCegarLoop]: Abstraction has 3877 states and 5679 transitions. [2023-11-23 20:38:27,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 5 states have internal predecessors, (82), 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) [2023-11-23 20:38:27,933 INFO L276 IsEmpty]: Start isEmpty. Operand 3877 states and 5679 transitions. [2023-11-23 20:38:27,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2023-11-23 20:38:27,972 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:27,973 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] [2023-11-23 20:38:28,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 20:38:28,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:28,196 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:28,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:28,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1746886490, now seen corresponding path program 1 times [2023-11-23 20:38:28,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:28,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212341625] [2023-11-23 20:38:28,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:28,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:28,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1154 trivial. 0 not checked. [2023-11-23 20:38:28,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:28,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212341625] [2023-11-23 20:38:28,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212341625] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:38:28,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:38:28,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:38:28,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132367579] [2023-11-23 20:38:28,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:38:28,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:38:28,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:38:28,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:38:28,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:38:28,434 INFO L87 Difference]: Start difference. First operand 3877 states and 5679 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2023-11-23 20:38:29,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:38:29,344 INFO L93 Difference]: Finished difference Result 10335 states and 15133 transitions. [2023-11-23 20:38:29,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:38:29,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 254 [2023-11-23 20:38:29,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:38:29,422 INFO L225 Difference]: With dead ends: 10335 [2023-11-23 20:38:29,422 INFO L226 Difference]: Without dead ends: 6464 [2023-11-23 20:38:29,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:38:29,456 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 [2023-11-23 20:38:29,456 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] [2023-11-23 20:38:29,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6464 states. [2023-11-23 20:38:30,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6464 to 6454. [2023-11-23 20:38:30,011 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) [2023-11-23 20:38:30,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6454 states to 6454 states and 9447 transitions. [2023-11-23 20:38:30,060 INFO L78 Accepts]: Start accepts. Automaton has 6454 states and 9447 transitions. Word has length 254 [2023-11-23 20:38:30,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:38:30,061 INFO L495 AbstractCegarLoop]: Abstraction has 6454 states and 9447 transitions. [2023-11-23 20:38:30,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2023-11-23 20:38:30,062 INFO L276 IsEmpty]: Start isEmpty. Operand 6454 states and 9447 transitions. [2023-11-23 20:38:30,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2023-11-23 20:38:30,072 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:38:30,072 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:38:30,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 20:38:30,073 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:38:30,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:38:30,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1952348239, now seen corresponding path program 1 times [2023-11-23 20:38:30,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:38:30,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917824511] [2023-11-23 20:38:30,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:30,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:38:30,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1679 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 1656 trivial. 0 not checked. [2023-11-23 20:38:30,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:38:30,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917824511] [2023-11-23 20:38:30,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917824511] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:38:30,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549474116] [2023-11-23 20:38:30,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:38:30,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:38:30,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:38:30,831 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:38:30,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ec5a70ea-1843-44f2-88c2-d905587df111/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 20:38:31,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:38:31,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 1959 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 20:38:31,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:38:31,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1679 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 1660 trivial. 0 not checked. [2023-11-23 20:38:31,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:38:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1679 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 1661 trivial. 0 not checked. [2023-11-23 20:38:32,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549474116] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:38:32,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [340185937] [2023-11-23 20:38:32,227 INFO L159 IcfgInterpreter]: Started Sifa with 136 locations of interest [2023-11-23 20:38:32,228 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:38:32,232 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:38:32,238 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:38:32,239 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs