./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.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_59b642ff-73ce-432c-af57-d2636a0c747f/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b642ff-73ce-432c-af57-d2636a0c747f/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_59b642ff-73ce-432c-af57-d2636a0c747f/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b642ff-73ce-432c-af57-d2636a0c747f/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b642ff-73ce-432c-af57-d2636a0c747f/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_59b642ff-73ce-432c-af57-d2636a0c747f/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 83293f5c81ac30df7449dd9c03263a4edbba62be916a9a4fda92d2518792b8d4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:08:07,225 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:08:07,331 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b642ff-73ce-432c-af57-d2636a0c747f/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:08:07,342 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:08:07,343 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:08:07,380 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:08:07,381 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:08:07,382 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:08:07,383 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:08:07,388 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:08:07,388 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:08:07,389 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:08:07,389 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:08:07,391 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:08:07,392 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:08:07,392 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:08:07,392 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:08:07,393 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:08:07,395 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:08:07,395 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:08:07,396 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:08:07,396 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:08:07,397 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:08:07,398 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:08:07,398 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:08:07,399 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:08:07,399 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:08:07,400 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:08:07,400 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:08:07,400 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:08:07,402 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:08:07,402 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:08:07,402 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:08:07,403 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:08:07,403 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:08:07,403 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:08:07,404 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:08:07,404 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:08:07,404 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:08:07,404 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:08:07,405 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:08:07,405 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:08:07,405 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:08:07,405 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:08:07,406 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_59b642ff-73ce-432c-af57-d2636a0c747f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b642ff-73ce-432c-af57-d2636a0c747f/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83293f5c81ac30df7449dd9c03263a4edbba62be916a9a4fda92d2518792b8d4 [2023-11-23 21:08:07,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:08:07,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:08:07,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:08:07,780 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:08:07,780 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:08:07,782 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b642ff-73ce-432c-af57-d2636a0c747f/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2023-11-23 21:08:10,921 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:08:11,504 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:08:11,505 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b642ff-73ce-432c-af57-d2636a0c747f/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2023-11-23 21:08:11,556 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b642ff-73ce-432c-af57-d2636a0c747f/bin/utaipan-verify-mE87zJ7Ire/data/1ac59aef9/c1ba5a8401e24c548fecc2adae82409d/FLAG3ce7e1c9f [2023-11-23 21:08:11,576 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b642ff-73ce-432c-af57-d2636a0c747f/bin/utaipan-verify-mE87zJ7Ire/data/1ac59aef9/c1ba5a8401e24c548fecc2adae82409d [2023-11-23 21:08:11,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:08:11,586 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:08:11,591 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:08:11,592 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:08:11,597 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:08:11,598 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:08:11" (1/1) ... [2023-11-23 21:08:11,599 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49162300 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:11, skipping insertion in model container [2023-11-23 21:08:11,600 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:08:11" (1/1) ... [2023-11-23 21:08:11,732 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:08:12,803 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_59b642ff-73ce-432c-af57-d2636a0c747f/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i[163669,163682] [2023-11-23 21:08:13,351 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:08:13,397 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:08:13,579 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("bswapl %0": "=r" (val): "0" (val)); [5402] [2023-11-23 21:08:13,583 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"); [5440] [2023-11-23 21:08:13,584 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)); [5447] [2023-11-23 21:08:13,584 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 %2,%1\n\tsbb %0,%0": "=r" (oldbit), "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [5455-5456] [2023-11-23 21:08:13,587 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; incl %0": "+m" (v->counter)); [5484] [2023-11-23 21:08:13,588 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; decl %0": "+m" (v->counter)); [5491] [2023-11-23 21:08:13,597 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_59b642ff-73ce-432c-af57-d2636a0c747f/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i[163669,163682] [2023-11-23 21:08:13,644 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"/work/ldvuser/mutilin/launch/work/current--X--drivers--X--defaultlinux-3.12-rc1.tar.xz--X--144_2a--X--cpachecker/linux-3.12-rc1.tar.xz/csd_deg_dscv/6228/dscv_tempdir/dscv/ri/144_2a/drivers/net/can/usb/usb_8dev.o.c.prepared"), "i" (621), "i" (12UL)); [6324-6325] [2023-11-23 21:08:13,739 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:08:13,866 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:08:13,867 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:13 WrapperNode [2023-11-23 21:08:13,867 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:08:13,868 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:08:13,868 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:08:13,868 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:08:13,875 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:13" (1/1) ... [2023-11-23 21:08:13,958 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:13" (1/1) ... [2023-11-23 21:08:14,077 INFO L138 Inliner]: procedures = 175, calls = 824, calls flagged for inlining = 87, calls inlined = 87, statements flattened = 2502 [2023-11-23 21:08:14,078 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:08:14,078 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:08:14,079 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:08:14,079 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:08:14,090 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:13" (1/1) ... [2023-11-23 21:08:14,090 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:13" (1/1) ... [2023-11-23 21:08:14,112 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:13" (1/1) ... [2023-11-23 21:08:14,112 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:13" (1/1) ... [2023-11-23 21:08:14,211 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:13" (1/1) ... [2023-11-23 21:08:14,241 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:13" (1/1) ... [2023-11-23 21:08:14,262 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:13" (1/1) ... [2023-11-23 21:08:14,298 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:13" (1/1) ... [2023-11-23 21:08:14,327 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:08:14,328 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:08:14,328 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:08:14,329 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:08:14,330 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:13" (1/1) ... [2023-11-23 21:08:14,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:08:14,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b642ff-73ce-432c-af57-d2636a0c747f/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:08:14,363 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b642ff-73ce-432c-af57-d2636a0c747f/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:08:14,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b642ff-73ce-432c-af57-d2636a0c747f/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:08:14,404 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2023-11-23 21:08:14,404 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2023-11-23 21:08:14,405 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2023-11-23 21:08:14,405 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2023-11-23 21:08:14,405 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_2 [2023-11-23 21:08:14,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_2 [2023-11-23 21:08:14,405 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_15 [2023-11-23 21:08:14,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_15 [2023-11-23 21:08:14,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 21:08:14,406 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_3 [2023-11-23 21:08:14,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_3 [2023-11-23 21:08:14,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-23 21:08:14,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-23 21:08:14,407 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2023-11-23 21:08:14,408 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2023-11-23 21:08:14,408 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 21:08:14,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 21:08:14,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:08:14,410 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2023-11-23 21:08:14,410 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2023-11-23 21:08:14,410 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2023-11-23 21:08:14,410 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2023-11-23 21:08:14,411 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2023-11-23 21:08:14,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2023-11-23 21:08:14,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-23 21:08:14,412 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-23 21:08:14,412 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-11-23 21:08:14,412 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-11-23 21:08:14,413 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 21:08:14,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 21:08:14,413 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2023-11-23 21:08:14,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2023-11-23 21:08:14,413 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_read_bulk_callback [2023-11-23 21:08:14,414 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_read_bulk_callback [2023-11-23 21:08:14,414 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_anchored_urbs [2023-11-23 21:08:14,414 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_anchored_urbs [2023-11-23 21:08:14,414 INFO L130 BoogieDeclarations]: Found specification of procedure init_usb_anchor [2023-11-23 21:08:14,414 INFO L138 BoogieDeclarations]: Found implementation of procedure init_usb_anchor [2023-11-23 21:08:14,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:08:14,415 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 21:08:14,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 21:08:14,415 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-23 21:08:14,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-23 21:08:14,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-23 21:08:14,415 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-23 21:08:14,416 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:08:14,416 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:08:14,416 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2023-11-23 21:08:14,416 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2023-11-23 21:08:14,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:08:14,416 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_err [2023-11-23 21:08:14,417 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_err [2023-11-23 21:08:14,417 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2023-11-23 21:08:14,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2023-11-23 21:08:14,417 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_all_urbs [2023-11-23 21:08:14,418 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_all_urbs [2023-11-23 21:08:14,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:08:14,419 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2023-11-23 21:08:14,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2023-11-23 21:08:14,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:08:14,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:08:14,420 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-23 21:08:14,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-23 21:08:14,420 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2023-11-23 21:08:14,420 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2023-11-23 21:08:14,421 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2023-11-23 21:08:14,421 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2023-11-23 21:08:14,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:08:14,421 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2023-11-23 21:08:14,422 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2023-11-23 21:08:14,422 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2023-11-23 21:08:14,422 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2023-11-23 21:08:14,422 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2023-11-23 21:08:14,422 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2023-11-23 21:08:14,422 INFO L130 BoogieDeclarations]: Found specification of procedure can_led_event [2023-11-23 21:08:14,423 INFO L138 BoogieDeclarations]: Found implementation of procedure can_led_event [2023-11-23 21:08:14,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:08:14,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:08:14,423 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_disconnect [2023-11-23 21:08:14,424 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_disconnect [2023-11-23 21:08:14,424 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_warn [2023-11-23 21:08:14,424 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_warn [2023-11-23 21:08:14,425 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2023-11-23 21:08:14,425 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2023-11-23 21:08:14,425 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2023-11-23 21:08:14,425 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2023-11-23 21:08:14,425 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2023-11-23 21:08:14,425 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2023-11-23 21:08:14,426 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2023-11-23 21:08:14,426 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2023-11-23 21:08:14,426 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_info [2023-11-23 21:08:14,426 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_info [2023-11-23 21:08:14,426 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2023-11-23 21:08:14,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2023-11-23 21:08:14,426 INFO L130 BoogieDeclarations]: Found specification of procedure close_candev [2023-11-23 21:08:14,427 INFO L138 BoogieDeclarations]: Found implementation of procedure close_candev [2023-11-23 21:08:14,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:08:14,427 INFO L130 BoogieDeclarations]: Found specification of procedure free_candev [2023-11-23 21:08:14,427 INFO L138 BoogieDeclarations]: Found implementation of procedure free_candev [2023-11-23 21:08:14,427 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2023-11-23 21:08:14,427 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2023-11-23 21:08:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-23 21:08:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_send_cmd [2023-11-23 21:08:14,428 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_send_cmd [2023-11-23 21:08:14,429 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-23 21:08:14,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-23 21:08:14,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:08:14,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:08:14,429 INFO L130 BoogieDeclarations]: Found specification of procedure usb_8dev_cmd_open [2023-11-23 21:08:14,430 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_8dev_cmd_open [2023-11-23 21:08:14,991 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:08:14,994 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:08:15,183 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 21:08:16,078 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2023-11-23 21:08:19,247 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:08:20,221 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:08:20,221 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:08:20,223 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:08:20 BoogieIcfgContainer [2023-11-23 21:08:20,223 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:08:20,227 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:08:20,227 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:08:20,230 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:08:20,230 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:08:11" (1/3) ... [2023-11-23 21:08:20,232 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca0b18b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:08:20, skipping insertion in model container [2023-11-23 21:08:20,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:13" (2/3) ... [2023-11-23 21:08:20,234 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca0b18b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:08:20, skipping insertion in model container [2023-11-23 21:08:20,234 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:08:20" (3/3) ... [2023-11-23 21:08:20,237 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--usb_8dev.ko-entry_point.cil.out.i [2023-11-23 21:08:20,258 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:08:20,258 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:08:20,343 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:08:20,351 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;@1a771b0c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:08:20,351 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:08:20,361 INFO L276 IsEmpty]: Start isEmpty. Operand has 536 states, 334 states have (on average 1.3532934131736527) internal successors, (452), 353 states have internal predecessors, (452), 155 states have call successors, (155), 47 states have call predecessors, (155), 45 states have return successors, (149), 148 states have call predecessors, (149), 149 states have call successors, (149) [2023-11-23 21:08:20,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-23 21:08:20,372 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:20,373 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:08:20,374 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:20,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:20,383 INFO L85 PathProgramCache]: Analyzing trace with hash -168201740, now seen corresponding path program 1 times [2023-11-23 21:08:20,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:20,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942587230] [2023-11-23 21:08:20,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:20,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:20,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:21,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:08:21,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:21,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942587230] [2023-11-23 21:08:21,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942587230] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:21,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:21,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:08:21,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442320489] [2023-11-23 21:08:21,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:21,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:08:21,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:21,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:08:21,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:08:21,188 INFO L87 Difference]: Start difference. First operand has 536 states, 334 states have (on average 1.3532934131736527) internal successors, (452), 353 states have internal predecessors, (452), 155 states have call successors, (155), 47 states have call predecessors, (155), 45 states have return successors, (149), 148 states have call predecessors, (149), 149 states have call successors, (149) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:08:24,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:24,433 INFO L93 Difference]: Finished difference Result 1576 states and 2222 transitions. [2023-11-23 21:08:24,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:08:24,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2023-11-23 21:08:24,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:24,468 INFO L225 Difference]: With dead ends: 1576 [2023-11-23 21:08:24,468 INFO L226 Difference]: Without dead ends: 1025 [2023-11-23 21:08:24,483 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 21:08:24,487 INFO L413 NwaCegarLoop]: 638 mSDtfsCounter, 712 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:24,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 1263 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-23 21:08:24,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2023-11-23 21:08:24,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 1025. [2023-11-23 21:08:24,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 647 states have (on average 1.3245749613601236) internal successors, (857), 665 states have internal predecessors, (857), 289 states have call successors, (289), 89 states have call predecessors, (289), 88 states have return successors, (284), 282 states have call predecessors, (284), 284 states have call successors, (284) [2023-11-23 21:08:24,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1430 transitions. [2023-11-23 21:08:24,671 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1430 transitions. Word has length 23 [2023-11-23 21:08:24,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:24,671 INFO L495 AbstractCegarLoop]: Abstraction has 1025 states and 1430 transitions. [2023-11-23 21:08:24,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 21:08:24,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1430 transitions. [2023-11-23 21:08:24,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-23 21:08:24,675 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:24,676 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:08:24,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:08:24,676 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:24,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:24,677 INFO L85 PathProgramCache]: Analyzing trace with hash -568837741, now seen corresponding path program 1 times [2023-11-23 21:08:24,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:24,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501637128] [2023-11-23 21:08:24,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:24,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:25,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:08:25,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:25,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501637128] [2023-11-23 21:08:25,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501637128] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:25,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:25,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:08:25,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817795269] [2023-11-23 21:08:25,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:25,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:08:25,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:25,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:08:25,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:08:25,287 INFO L87 Difference]: Start difference. First operand 1025 states and 1430 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:08:28,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:08:28,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:28,403 INFO L93 Difference]: Finished difference Result 1619 states and 2234 transitions. [2023-11-23 21:08:28,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:08:28,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2023-11-23 21:08:28,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:28,417 INFO L225 Difference]: With dead ends: 1619 [2023-11-23 21:08:28,418 INFO L226 Difference]: Without dead ends: 1616 [2023-11-23 21:08:28,419 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 21:08:28,420 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 400 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:28,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 1222 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-23 21:08:28,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2023-11-23 21:08:28,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1604. [2023-11-23 21:08:28,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1016 states have (on average 1.3228346456692914) internal successors, (1344), 1040 states have internal predecessors, (1344), 439 states have call successors, (439), 151 states have call predecessors, (439), 148 states have return successors, (434), 426 states have call predecessors, (434), 434 states have call successors, (434) [2023-11-23 21:08:28,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 2217 transitions. [2023-11-23 21:08:28,547 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 2217 transitions. Word has length 32 [2023-11-23 21:08:28,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:28,548 INFO L495 AbstractCegarLoop]: Abstraction has 1604 states and 2217 transitions. [2023-11-23 21:08:28,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:08:28,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 2217 transitions. [2023-11-23 21:08:28,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-23 21:08:28,551 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:28,551 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:08:28,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:08:28,552 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:28,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:28,553 INFO L85 PathProgramCache]: Analyzing trace with hash -454528852, now seen corresponding path program 1 times [2023-11-23 21:08:28,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:28,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518219610] [2023-11-23 21:08:28,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:28,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:28,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:29,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:08:29,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:29,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518219610] [2023-11-23 21:08:29,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518219610] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:29,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:29,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:08:29,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215088088] [2023-11-23 21:08:29,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:29,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:08:29,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:29,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:08:29,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:08:29,052 INFO L87 Difference]: Start difference. First operand 1604 states and 2217 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:08:31,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:08:32,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:32,144 INFO L93 Difference]: Finished difference Result 1606 states and 2218 transitions. [2023-11-23 21:08:32,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:08:32,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2023-11-23 21:08:32,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:32,161 INFO L225 Difference]: With dead ends: 1606 [2023-11-23 21:08:32,161 INFO L226 Difference]: Without dead ends: 1603 [2023-11-23 21:08:32,163 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 21:08:32,165 INFO L413 NwaCegarLoop]: 614 mSDtfsCounter, 712 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:32,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 614 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-23 21:08:32,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2023-11-23 21:08:32,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1603. [2023-11-23 21:08:32,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1016 states have (on average 1.3218503937007875) internal successors, (1343), 1039 states have internal predecessors, (1343), 438 states have call successors, (438), 151 states have call predecessors, (438), 148 states have return successors, (434), 426 states have call predecessors, (434), 434 states have call successors, (434) [2023-11-23 21:08:32,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 2215 transitions. [2023-11-23 21:08:32,315 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 2215 transitions. Word has length 33 [2023-11-23 21:08:32,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:32,316 INFO L495 AbstractCegarLoop]: Abstraction has 1603 states and 2215 transitions. [2023-11-23 21:08:32,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:08:32,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 2215 transitions. [2023-11-23 21:08:32,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-23 21:08:32,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:32,319 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:08:32,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:08:32,319 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:32,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:32,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1205915722, now seen corresponding path program 1 times [2023-11-23 21:08:32,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:32,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980338201] [2023-11-23 21:08:32,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:32,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:32,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:32,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:08:32,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:32,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980338201] [2023-11-23 21:08:32,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980338201] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:32,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:32,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:08:32,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065616249] [2023-11-23 21:08:32,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:32,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:08:32,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:32,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:08:32,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:08:32,625 INFO L87 Difference]: Start difference. First operand 1603 states and 2215 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:08:35,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:35,540 INFO L93 Difference]: Finished difference Result 1605 states and 2216 transitions. [2023-11-23 21:08:35,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:08:35,541 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2023-11-23 21:08:35,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:35,555 INFO L225 Difference]: With dead ends: 1605 [2023-11-23 21:08:35,556 INFO L226 Difference]: Without dead ends: 1602 [2023-11-23 21:08:35,557 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 21:08:35,559 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 709 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:35,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 612 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-23 21:08:35,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1602 states. [2023-11-23 21:08:35,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1602 to 1602. [2023-11-23 21:08:35,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1016 states have (on average 1.3208661417322836) internal successors, (1342), 1038 states have internal predecessors, (1342), 437 states have call successors, (437), 151 states have call predecessors, (437), 148 states have return successors, (434), 426 states have call predecessors, (434), 434 states have call successors, (434) [2023-11-23 21:08:35,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 2213 transitions. [2023-11-23 21:08:35,701 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 2213 transitions. Word has length 34 [2023-11-23 21:08:35,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:35,702 INFO L495 AbstractCegarLoop]: Abstraction has 1602 states and 2213 transitions. [2023-11-23 21:08:35,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:08:35,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 2213 transitions. [2023-11-23 21:08:35,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-23 21:08:35,704 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:35,705 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:08:35,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:08:35,705 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:35,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:35,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1270899951, now seen corresponding path program 1 times [2023-11-23 21:08:35,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:35,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182705748] [2023-11-23 21:08:35,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:35,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:35,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:35,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:08:35,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:35,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182705748] [2023-11-23 21:08:35,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182705748] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:35,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:35,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:08:35,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719320468] [2023-11-23 21:08:35,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:35,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:08:35,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:35,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:08:35,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:08:35,938 INFO L87 Difference]: Start difference. First operand 1602 states and 2213 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:08:38,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:38,015 INFO L93 Difference]: Finished difference Result 1604 states and 2214 transitions. [2023-11-23 21:08:38,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:08:38,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2023-11-23 21:08:38,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:38,029 INFO L225 Difference]: With dead ends: 1604 [2023-11-23 21:08:38,029 INFO L226 Difference]: Without dead ends: 1601 [2023-11-23 21:08:38,031 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 21:08:38,032 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 706 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:38,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [706 Valid, 610 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-23 21:08:38,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2023-11-23 21:08:38,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1601. [2023-11-23 21:08:38,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1016 states have (on average 1.3198818897637796) internal successors, (1341), 1037 states have internal predecessors, (1341), 436 states have call successors, (436), 151 states have call predecessors, (436), 148 states have return successors, (434), 426 states have call predecessors, (434), 434 states have call successors, (434) [2023-11-23 21:08:38,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 2211 transitions. [2023-11-23 21:08:38,178 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 2211 transitions. Word has length 35 [2023-11-23 21:08:38,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:38,178 INFO L495 AbstractCegarLoop]: Abstraction has 1601 states and 2211 transitions. [2023-11-23 21:08:38,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:08:38,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 2211 transitions. [2023-11-23 21:08:38,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-23 21:08:38,183 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:38,183 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:08:38,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:08:38,184 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:38,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:38,184 INFO L85 PathProgramCache]: Analyzing trace with hash 742779353, now seen corresponding path program 1 times [2023-11-23 21:08:38,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:38,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757333710] [2023-11-23 21:08:38,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:38,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:38,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:08:38,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:38,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757333710] [2023-11-23 21:08:38,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757333710] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:38,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:38,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:08:38,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062090848] [2023-11-23 21:08:38,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:38,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:08:38,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:38,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:08:38,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:08:38,435 INFO L87 Difference]: Start difference. First operand 1601 states and 2211 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:08:39,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:39,651 INFO L93 Difference]: Finished difference Result 1603 states and 2212 transitions. [2023-11-23 21:08:39,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:08:39,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2023-11-23 21:08:39,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:39,664 INFO L225 Difference]: With dead ends: 1603 [2023-11-23 21:08:39,664 INFO L226 Difference]: Without dead ends: 1594 [2023-11-23 21:08:39,666 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 21:08:39,668 INFO L413 NwaCegarLoop]: 609 mSDtfsCounter, 703 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:39,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [703 Valid, 609 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 21:08:39,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2023-11-23 21:08:39,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1594. [2023-11-23 21:08:39,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1010 states have (on average 1.3178217821782179) internal successors, (1331), 1030 states have internal predecessors, (1331), 435 states have call successors, (435), 151 states have call predecessors, (435), 148 states have return successors, (434), 426 states have call predecessors, (434), 434 states have call successors, (434) [2023-11-23 21:08:39,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2200 transitions. [2023-11-23 21:08:39,815 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2200 transitions. Word has length 36 [2023-11-23 21:08:39,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:39,818 INFO L495 AbstractCegarLoop]: Abstraction has 1594 states and 2200 transitions. [2023-11-23 21:08:39,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:08:39,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2200 transitions. [2023-11-23 21:08:39,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-23 21:08:39,827 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:39,827 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:08:39,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:08:39,827 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:39,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:39,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1409721211, now seen corresponding path program 1 times [2023-11-23 21:08:39,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:39,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690813920] [2023-11-23 21:08:39,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:39,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:39,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:40,084 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 21:08:40,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:40,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690813920] [2023-11-23 21:08:40,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690813920] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:40,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:40,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:08:40,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569733693] [2023-11-23 21:08:40,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:40,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:08:40,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:40,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:08:40,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:08:40,087 INFO L87 Difference]: Start difference. First operand 1594 states and 2200 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:08:42,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:42,675 INFO L93 Difference]: Finished difference Result 3810 states and 5212 transitions. [2023-11-23 21:08:42,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:08:42,676 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2023-11-23 21:08:42,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:42,694 INFO L225 Difference]: With dead ends: 3810 [2023-11-23 21:08:42,694 INFO L226 Difference]: Without dead ends: 2221 [2023-11-23 21:08:42,702 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 21:08:42,703 INFO L413 NwaCegarLoop]: 651 mSDtfsCounter, 214 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 1241 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:42,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 1241 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-23 21:08:42,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2221 states. [2023-11-23 21:08:42,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2221 to 2216. [2023-11-23 21:08:42,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2216 states, 1412 states have (on average 1.311614730878187) internal successors, (1852), 1436 states have internal predecessors, (1852), 580 states have call successors, (580), 226 states have call predecessors, (580), 223 states have return successors, (579), 571 states have call predecessors, (579), 579 states have call successors, (579) [2023-11-23 21:08:42,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2216 states to 2216 states and 3011 transitions. [2023-11-23 21:08:42,992 INFO L78 Accepts]: Start accepts. Automaton has 2216 states and 3011 transitions. Word has length 71 [2023-11-23 21:08:42,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:42,994 INFO L495 AbstractCegarLoop]: Abstraction has 2216 states and 3011 transitions. [2023-11-23 21:08:42,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:08:42,995 INFO L276 IsEmpty]: Start isEmpty. Operand 2216 states and 3011 transitions. [2023-11-23 21:08:43,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-23 21:08:43,001 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:43,002 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:08:43,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:08:43,002 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:43,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:43,003 INFO L85 PathProgramCache]: Analyzing trace with hash -420413270, now seen corresponding path program 1 times [2023-11-23 21:08:43,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:43,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813042343] [2023-11-23 21:08:43,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:43,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:43,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-23 21:08:43,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:43,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813042343] [2023-11-23 21:08:43,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813042343] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:43,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:43,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:08:43,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256759535] [2023-11-23 21:08:43,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:43,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:08:43,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:43,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:08:43,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:08:43,405 INFO L87 Difference]: Start difference. First operand 2216 states and 3011 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 21:08:48,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:08:49,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:49,918 INFO L93 Difference]: Finished difference Result 5082 states and 6892 transitions. [2023-11-23 21:08:49,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:08:49,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 83 [2023-11-23 21:08:49,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:49,938 INFO L225 Difference]: With dead ends: 5082 [2023-11-23 21:08:49,939 INFO L226 Difference]: Without dead ends: 2877 [2023-11-23 21:08:49,946 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 21:08:49,947 INFO L413 NwaCegarLoop]: 771 mSDtfsCounter, 218 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 1364 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:49,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 1364 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 282 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2023-11-23 21:08:49,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2877 states. [2023-11-23 21:08:50,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2877 to 2872. [2023-11-23 21:08:50,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 1850 states have (on average 1.3124324324324323) internal successors, (2428), 1878 states have internal predecessors, (2428), 724 states have call successors, (724), 300 states have call predecessors, (724), 297 states have return successors, (723), 715 states have call predecessors, (723), 723 states have call successors, (723) [2023-11-23 21:08:50,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 3875 transitions. [2023-11-23 21:08:50,186 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 3875 transitions. Word has length 83 [2023-11-23 21:08:50,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:50,187 INFO L495 AbstractCegarLoop]: Abstraction has 2872 states and 3875 transitions. [2023-11-23 21:08:50,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 21:08:50,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 3875 transitions. [2023-11-23 21:08:50,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-23 21:08:50,192 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:50,193 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2023-11-23 21:08:50,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:08:50,193 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:50,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:50,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1836448478, now seen corresponding path program 1 times [2023-11-23 21:08:50,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:50,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244692315] [2023-11-23 21:08:50,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:50,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:50,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-23 21:08:50,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:50,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244692315] [2023-11-23 21:08:50,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244692315] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:50,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:50,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:08:50,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311185935] [2023-11-23 21:08:50,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:50,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:08:50,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:50,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:08:50,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:08:50,516 INFO L87 Difference]: Start difference. First operand 2872 states and 3875 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-23 21:08:56,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:56,377 INFO L93 Difference]: Finished difference Result 5711 states and 7968 transitions. [2023-11-23 21:08:56,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:08:56,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 92 [2023-11-23 21:08:56,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:56,409 INFO L225 Difference]: With dead ends: 5711 [2023-11-23 21:08:56,409 INFO L226 Difference]: Without dead ends: 4033 [2023-11-23 21:08:56,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:08:56,418 INFO L413 NwaCegarLoop]: 819 mSDtfsCounter, 157 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 2286 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:56,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 2286 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-11-23 21:08:56,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4033 states. [2023-11-23 21:08:56,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4033 to 2880. [2023-11-23 21:08:56,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2880 states, 1858 states have (on average 1.3110871905274488) internal successors, (2436), 1886 states have internal predecessors, (2436), 724 states have call successors, (724), 300 states have call predecessors, (724), 297 states have return successors, (723), 715 states have call predecessors, (723), 723 states have call successors, (723) [2023-11-23 21:08:56,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2880 states to 2880 states and 3883 transitions. [2023-11-23 21:08:56,811 INFO L78 Accepts]: Start accepts. Automaton has 2880 states and 3883 transitions. Word has length 92 [2023-11-23 21:08:56,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:56,812 INFO L495 AbstractCegarLoop]: Abstraction has 2880 states and 3883 transitions. [2023-11-23 21:08:56,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-23 21:08:56,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2880 states and 3883 transitions. [2023-11-23 21:08:56,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-23 21:08:56,823 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:56,823 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2023-11-23 21:08:56,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 21:08:56,823 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:08:56,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:56,829 INFO L85 PathProgramCache]: Analyzing trace with hash 731475299, now seen corresponding path program 1 times [2023-11-23 21:08:56,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:08:56,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080581251] [2023-11-23 21:08:56,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:56,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:08:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:57,646 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-23 21:08:57,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:08:57,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080581251] [2023-11-23 21:08:57,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080581251] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:08:57,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24195918] [2023-11-23 21:08:57,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:57,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:08:57,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b642ff-73ce-432c-af57-d2636a0c747f/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:08:57,652 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b642ff-73ce-432c-af57-d2636a0c747f/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:08:57,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59b642ff-73ce-432c-af57-d2636a0c747f/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:08:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:58,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 1328 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 21:08:58,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:08:58,931 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 21:08:58,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:08:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-23 21:08:59,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24195918] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-23 21:08:59,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:08:59,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 13 [2023-11-23 21:08:59,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445077687] [2023-11-23 21:08:59,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:59,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:08:59,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:08:59,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:08:59,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:08:59,127 INFO L87 Difference]: Start difference. First operand 2880 states and 3883 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)