./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--ems_usb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e756a718-39cf-4fa1-ba3d-f7736ce955d2/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e756a718-39cf-4fa1-ba3d-f7736ce955d2/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e756a718-39cf-4fa1-ba3d-f7736ce955d2/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e756a718-39cf-4fa1-ba3d-f7736ce955d2/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e756a718-39cf-4fa1-ba3d-f7736ce955d2/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e756a718-39cf-4fa1-ba3d-f7736ce955d2/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash be936ec9376452d086f72aa92ac4fe7deb233a068e40e0ed8f478fbc228d19b6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:48:29,172 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:48:29,269 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e756a718-39cf-4fa1-ba3d-f7736ce955d2/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-19 04:48:29,274 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:48:29,274 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:48:29,301 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:48:29,301 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:48:29,302 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:48:29,303 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:48:29,303 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:48:29,304 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:48:29,304 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:48:29,305 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:48:29,305 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:48:29,306 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:48:29,306 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:48:29,307 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:48:29,307 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:48:29,308 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:48:29,308 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:48:29,309 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:48:29,312 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:48:29,313 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:48:29,314 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:48:29,314 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:48:29,314 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:48:29,315 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:48:29,315 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:48:29,315 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:48:29,316 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:48:29,317 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:48:29,317 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:48:29,318 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:48:29,318 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:48:29,318 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:48:29,319 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:48:29,319 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:48:29,320 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:48:29,320 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:48:29,320 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:48:29,321 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:48:29,321 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:48:29,322 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_e756a718-39cf-4fa1-ba3d-f7736ce955d2/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e756a718-39cf-4fa1-ba3d-f7736ce955d2/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be936ec9376452d086f72aa92ac4fe7deb233a068e40e0ed8f478fbc228d19b6 [2023-11-19 04:48:29,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:48:29,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:48:29,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:48:29,680 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:48:29,681 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:48:29,682 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e756a718-39cf-4fa1-ba3d-f7736ce955d2/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i [2023-11-19 04:48:32,941 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:48:33,644 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:48:33,646 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e756a718-39cf-4fa1-ba3d-f7736ce955d2/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i [2023-11-19 04:48:33,701 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e756a718-39cf-4fa1-ba3d-f7736ce955d2/bin/utaipan-verify-t7M7D8N6sZ/data/6a29b8137/e3118c85f26f4404a5376a3bc9c4028b/FLAGef347cba6 [2023-11-19 04:48:33,718 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e756a718-39cf-4fa1-ba3d-f7736ce955d2/bin/utaipan-verify-t7M7D8N6sZ/data/6a29b8137/e3118c85f26f4404a5376a3bc9c4028b [2023-11-19 04:48:33,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:48:33,727 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:48:33,731 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:48:33,731 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:48:33,737 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:48:33,738 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:48:33" (1/1) ... [2023-11-19 04:48:33,739 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29a4e4c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:33, skipping insertion in model container [2023-11-19 04:48:33,739 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:48:33" (1/1) ... [2023-11-19 04:48:33,860 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:48:34,835 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_e756a718-39cf-4fa1-ba3d-f7736ce955d2/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i[164250,164263] [2023-11-19 04:48:35,468 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:48:35,512 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:48:35,641 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"); [5441] [2023-11-19 04:48:35,643 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)); [5448] [2023-11-19 04:48:35,644 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"); [5456-5457] [2023-11-19 04:48:35,646 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)); [5485] [2023-11-19 04:48:35,647 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)); [5492] [2023-11-19 04:48:35,666 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_e756a718-39cf-4fa1-ba3d-f7736ce955d2/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i[164250,164263] [2023-11-19 04:48:35,723 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/6225/dscv_tempdir/dscv/ri/144_2a/drivers/net/can/usb/ems_usb.o.c.prepared"), "i" (546), "i" (12UL)); [6159-6160] [2023-11-19 04:48:35,845 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:48:35,946 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:48:35,947 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:35 WrapperNode [2023-11-19 04:48:35,947 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:48:35,948 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:48:35,949 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:48:35,949 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:48:35,956 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:35" (1/1) ... [2023-11-19 04:48:36,040 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:35" (1/1) ... [2023-11-19 04:48:36,171 INFO L138 Inliner]: procedures = 169, calls = 760, calls flagged for inlining = 78, calls inlined = 78, statements flattened = 2216 [2023-11-19 04:48:36,172 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:48:36,173 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:48:36,173 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:48:36,173 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:48:36,184 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:35" (1/1) ... [2023-11-19 04:48:36,184 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:35" (1/1) ... [2023-11-19 04:48:36,213 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:35" (1/1) ... [2023-11-19 04:48:36,214 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:35" (1/1) ... [2023-11-19 04:48:36,346 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:35" (1/1) ... [2023-11-19 04:48:36,374 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:35" (1/1) ... [2023-11-19 04:48:36,414 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:35" (1/1) ... [2023-11-19 04:48:36,433 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:35" (1/1) ... [2023-11-19 04:48:36,459 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:48:36,461 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:48:36,461 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:48:36,461 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:48:36,462 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:35" (1/1) ... [2023-11-19 04:48:36,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:48:36,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e756a718-39cf-4fa1-ba3d-f7736ce955d2/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:48:36,494 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e756a718-39cf-4fa1-ba3d-f7736ce955d2/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:48:36,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e756a718-39cf-4fa1-ba3d-f7736ce955d2/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:48:36,539 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2023-11-19 04:48:36,540 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2023-11-19 04:48:36,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-19 04:48:36,540 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_18 [2023-11-19 04:48:36,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_18 [2023-11-19 04:48:36,541 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_4 [2023-11-19 04:48:36,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_4 [2023-11-19 04:48:36,541 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_3 [2023-11-19 04:48:36,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_3 [2023-11-19 04:48:36,542 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_2 [2023-11-19 04:48:36,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_2 [2023-11-19 04:48:36,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-19 04:48:36,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-19 04:48:36,542 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-19 04:48:36,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-19 04:48:36,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:48:36,544 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2023-11-19 04:48:36,544 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2023-11-19 04:48:36,544 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_read_bulk_callback [2023-11-19 04:48:36,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_read_bulk_callback [2023-11-19 04:48:36,545 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2023-11-19 04:48:36,546 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2023-11-19 04:48:36,546 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2023-11-19 04:48:36,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2023-11-19 04:48:36,546 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_control_cmd [2023-11-19 04:48:36,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_control_cmd [2023-11-19 04:48:36,547 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2023-11-19 04:48:36,548 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2023-11-19 04:48:36,548 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-11-19 04:48:36,548 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-11-19 04:48:36,549 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-19 04:48:36,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-19 04:48:36,549 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2023-11-19 04:48:36,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2023-11-19 04:48:36,550 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2023-11-19 04:48:36,550 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2023-11-19 04:48:36,550 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_anchored_urbs [2023-11-19 04:48:36,550 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_anchored_urbs [2023-11-19 04:48:36,550 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-19 04:48:36,550 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-19 04:48:36,551 INFO L130 BoogieDeclarations]: Found specification of procedure init_usb_anchor [2023-11-19 04:48:36,551 INFO L138 BoogieDeclarations]: Found implementation of procedure init_usb_anchor [2023-11-19 04:48:36,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:48:36,551 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-19 04:48:36,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-19 04:48:36,552 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-19 04:48:36,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-19 04:48:36,552 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 04:48:36,552 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 04:48:36,552 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2023-11-19 04:48:36,552 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2023-11-19 04:48:36,553 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_command_msg [2023-11-19 04:48:36,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_command_msg [2023-11-19 04:48:36,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 04:48:36,553 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_err [2023-11-19 04:48:36,553 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_err [2023-11-19 04:48:36,553 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2023-11-19 04:48:36,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2023-11-19 04:48:36,555 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_all_urbs [2023-11-19 04:48:36,556 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_all_urbs [2023-11-19 04:48:36,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:48:36,556 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2023-11-19 04:48:36,556 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2023-11-19 04:48:36,556 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2023-11-19 04:48:36,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2023-11-19 04:48:36,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:48:36,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 04:48:36,557 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_write_mode [2023-11-19 04:48:36,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_write_mode [2023-11-19 04:48:36,558 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-19 04:48:36,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-19 04:48:36,558 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2023-11-19 04:48:36,558 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2023-11-19 04:48:36,559 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2023-11-19 04:48:36,559 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2023-11-19 04:48:36,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 04:48:36,559 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_disconnect [2023-11-19 04:48:36,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_disconnect [2023-11-19 04:48:36,559 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2023-11-19 04:48:36,560 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2023-11-19 04:48:36,560 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2023-11-19 04:48:36,560 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2023-11-19 04:48:36,561 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_read_interrupt_callback [2023-11-19 04:48:36,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_read_interrupt_callback [2023-11-19 04:48:36,562 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2023-11-19 04:48:36,562 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2023-11-19 04:48:36,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:48:36,562 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2023-11-19 04:48:36,562 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2023-11-19 04:48:36,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 04:48:36,563 INFO L130 BoogieDeclarations]: Found specification of procedure ems_usb_rx_err [2023-11-19 04:48:36,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ems_usb_rx_err [2023-11-19 04:48:36,563 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-19 04:48:36,563 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-19 04:48:36,563 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_warn [2023-11-19 04:48:36,564 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_warn [2023-11-19 04:48:36,564 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-11-19 04:48:36,564 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-11-19 04:48:36,564 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2023-11-19 04:48:36,564 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2023-11-19 04:48:36,564 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2023-11-19 04:48:36,565 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2023-11-19 04:48:36,565 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2023-11-19 04:48:36,565 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2023-11-19 04:48:36,565 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2023-11-19 04:48:36,566 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2023-11-19 04:48:36,566 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_info [2023-11-19 04:48:36,566 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_info [2023-11-19 04:48:36,566 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2023-11-19 04:48:36,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2023-11-19 04:48:36,567 INFO L130 BoogieDeclarations]: Found specification of procedure close_candev [2023-11-19 04:48:36,567 INFO L138 BoogieDeclarations]: Found implementation of procedure close_candev [2023-11-19 04:48:36,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:48:36,568 INFO L130 BoogieDeclarations]: Found specification of procedure free_candev [2023-11-19 04:48:36,568 INFO L138 BoogieDeclarations]: Found implementation of procedure free_candev [2023-11-19 04:48:36,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-19 04:48:36,568 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-19 04:48:36,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-19 04:48:36,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:48:36,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:48:37,181 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:48:37,184 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:48:37,428 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-19 04:48:38,449 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2023-11-19 04:48:40,533 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:48:41,557 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:48:41,557 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 04:48:41,567 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:48:41 BoogieIcfgContainer [2023-11-19 04:48:41,567 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:48:41,570 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:48:41,570 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:48:41,573 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:48:41,574 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:48:33" (1/3) ... [2023-11-19 04:48:41,575 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495b7a22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:48:41, skipping insertion in model container [2023-11-19 04:48:41,575 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:48:35" (2/3) ... [2023-11-19 04:48:41,575 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495b7a22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:48:41, skipping insertion in model container [2023-11-19 04:48:41,575 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:48:41" (3/3) ... [2023-11-19 04:48:41,577 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--ems_usb.ko-entry_point.cil.out.i [2023-11-19 04:48:41,598 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:48:41,599 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:48:41,673 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:48:41,680 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;@129cc08a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:48:41,681 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:48:41,695 INFO L276 IsEmpty]: Start isEmpty. Operand has 542 states, 333 states have (on average 1.3543543543543544) internal successors, (451), 357 states have internal predecessors, (451), 157 states have call successors, (157), 52 states have call predecessors, (157), 50 states have return successors, (151), 146 states have call predecessors, (151), 151 states have call successors, (151) [2023-11-19 04:48:41,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-19 04:48:41,714 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:41,714 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] [2023-11-19 04:48:41,715 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:41,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:41,724 INFO L85 PathProgramCache]: Analyzing trace with hash 211913120, now seen corresponding path program 1 times [2023-11-19 04:48:41,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:41,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597874301] [2023-11-19 04:48:41,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:41,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 04:48:42,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:42,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597874301] [2023-11-19 04:48:42,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597874301] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:42,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:42,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:48:42,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303238281] [2023-11-19 04:48:42,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:42,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:48:42,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:42,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:48:42,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:48:42,668 INFO L87 Difference]: Start difference. First operand has 542 states, 333 states have (on average 1.3543543543543544) internal successors, (451), 357 states have internal predecessors, (451), 157 states have call successors, (157), 52 states have call predecessors, (157), 50 states have return successors, (151), 146 states have call predecessors, (151), 151 states have call successors, (151) 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) [2023-11-19 04:48:45,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:48:48,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:48:50,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:48:52,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:48:52,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:48:52,580 INFO L93 Difference]: Finished difference Result 1594 states and 2231 transitions. [2023-11-19 04:48:52,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:48:52,583 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 [2023-11-19 04:48:52,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:48:52,608 INFO L225 Difference]: With dead ends: 1594 [2023-11-19 04:48:52,608 INFO L226 Difference]: Without dead ends: 1037 [2023-11-19 04:48:52,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:48:52,620 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 715 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2023-11-19 04:48:52,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [715 Valid, 1287 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 219 Invalid, 3 Unknown, 0 Unchecked, 9.7s Time] [2023-11-19 04:48:52,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2023-11-19 04:48:52,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 1037. [2023-11-19 04:48:52,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1037 states, 645 states have (on average 1.3255813953488371) internal successors, (855), 673 states have internal predecessors, (855), 293 states have call successors, (293), 99 states have call predecessors, (293), 98 states have return successors, (288), 278 states have call predecessors, (288), 288 states have call successors, (288) [2023-11-19 04:48:52,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1037 states to 1037 states and 1436 transitions. [2023-11-19 04:48:52,765 INFO L78 Accepts]: Start accepts. Automaton has 1037 states and 1436 transitions. Word has length 23 [2023-11-19 04:48:52,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:48:52,765 INFO L495 AbstractCegarLoop]: Abstraction has 1037 states and 1436 transitions. [2023-11-19 04:48:52,766 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) [2023-11-19 04:48:52,766 INFO L276 IsEmpty]: Start isEmpty. Operand 1037 states and 1436 transitions. [2023-11-19 04:48:52,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-19 04:48:52,769 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:48:52,769 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] [2023-11-19 04:48:52,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:48:52,770 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:48:52,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:48:52,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1875463329, now seen corresponding path program 1 times [2023-11-19 04:48:52,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:48:52,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859338586] [2023-11-19 04:48:52,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:48:52,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:48:52,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:48:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:48:53,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:48:53,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859338586] [2023-11-19 04:48:53,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859338586] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:48:53,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:48:53,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:48:53,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944693000] [2023-11-19 04:48:53,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:48:53,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:48:53,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:48:53,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:48:53,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:48:53,399 INFO L87 Difference]: Start difference. First operand 1037 states and 1436 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) [2023-11-19 04:48:56,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:48:58,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:49:00,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:49:02,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:02,295 INFO L93 Difference]: Finished difference Result 1823 states and 2504 transitions. [2023-11-19 04:49:02,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:49:02,295 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 [2023-11-19 04:49:02,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:02,311 INFO L225 Difference]: With dead ends: 1823 [2023-11-19 04:49:02,311 INFO L226 Difference]: Without dead ends: 1820 [2023-11-19 04:49:02,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:49:02,314 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 530 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 1242 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:02,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 1242 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 219 Invalid, 3 Unknown, 0 Unchecked, 8.8s Time] [2023-11-19 04:49:02,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2023-11-19 04:49:02,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 1808. [2023-11-19 04:49:02,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1808 states, 1134 states have (on average 1.3350970017636685) internal successors, (1514), 1188 states have internal predecessors, (1514), 489 states have call successors, (489), 187 states have call predecessors, (489), 184 states have return successors, (484), 458 states have call predecessors, (484), 484 states have call successors, (484) [2023-11-19 04:49:02,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 2487 transitions. [2023-11-19 04:49:02,499 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 2487 transitions. Word has length 32 [2023-11-19 04:49:02,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:02,500 INFO L495 AbstractCegarLoop]: Abstraction has 1808 states and 2487 transitions. [2023-11-19 04:49:02,501 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) [2023-11-19 04:49:02,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 2487 transitions. [2023-11-19 04:49:02,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-19 04:49:02,508 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:02,508 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] [2023-11-19 04:49:02,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:49:02,512 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:02,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:02,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1990528496, now seen corresponding path program 1 times [2023-11-19 04:49:02,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:02,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65410362] [2023-11-19 04:49:02,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:02,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:49:02,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:02,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65410362] [2023-11-19 04:49:02,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65410362] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:49:02,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:49:02,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:49:02,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197676650] [2023-11-19 04:49:02,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:02,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:49:02,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:02,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:49:02,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:49:02,982 INFO L87 Difference]: Start difference. First operand 1808 states and 2487 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) [2023-11-19 04:49:05,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:49:08,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:49:08,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:08,199 INFO L93 Difference]: Finished difference Result 1810 states and 2488 transitions. [2023-11-19 04:49:08,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:49:08,199 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 [2023-11-19 04:49:08,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:08,214 INFO L225 Difference]: With dead ends: 1810 [2023-11-19 04:49:08,214 INFO L226 Difference]: Without dead ends: 1807 [2023-11-19 04:49:08,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:49:08,217 INFO L413 NwaCegarLoop]: 626 mSDtfsCounter, 715 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:08,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [715 Valid, 626 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 2 Unknown, 0 Unchecked, 5.1s Time] [2023-11-19 04:49:08,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2023-11-19 04:49:08,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1807. [2023-11-19 04:49:08,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1134 states have (on average 1.3342151675485008) internal successors, (1513), 1187 states have internal predecessors, (1513), 488 states have call successors, (488), 187 states have call predecessors, (488), 184 states have return successors, (484), 458 states have call predecessors, (484), 484 states have call successors, (484) [2023-11-19 04:49:08,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 2485 transitions. [2023-11-19 04:49:08,374 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 2485 transitions. Word has length 33 [2023-11-19 04:49:08,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:08,374 INFO L495 AbstractCegarLoop]: Abstraction has 1807 states and 2485 transitions. [2023-11-19 04:49:08,375 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) [2023-11-19 04:49:08,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 2485 transitions. [2023-11-19 04:49:08,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-19 04:49:08,376 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:08,377 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] [2023-11-19 04:49:08,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:49:08,377 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:08,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:08,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1577185916, now seen corresponding path program 1 times [2023-11-19 04:49:08,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:08,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912492130] [2023-11-19 04:49:08,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:08,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:49:08,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:08,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912492130] [2023-11-19 04:49:08,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912492130] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:49:08,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:49:08,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:49:08,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955005619] [2023-11-19 04:49:08,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:08,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:49:08,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:08,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:49:08,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:49:08,735 INFO L87 Difference]: Start difference. First operand 1807 states and 2485 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) [2023-11-19 04:49:11,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:49:14,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:49:14,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:14,418 INFO L93 Difference]: Finished difference Result 1809 states and 2486 transitions. [2023-11-19 04:49:14,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:49:14,419 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 [2023-11-19 04:49:14,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:14,436 INFO L225 Difference]: With dead ends: 1809 [2023-11-19 04:49:14,436 INFO L226 Difference]: Without dead ends: 1806 [2023-11-19 04:49:14,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:49:14,439 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 712 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:14,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 624 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2023-11-19 04:49:14,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2023-11-19 04:49:14,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1806. [2023-11-19 04:49:14,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1134 states have (on average 1.3333333333333333) internal successors, (1512), 1186 states have internal predecessors, (1512), 487 states have call successors, (487), 187 states have call predecessors, (487), 184 states have return successors, (484), 458 states have call predecessors, (484), 484 states have call successors, (484) [2023-11-19 04:49:14,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 2483 transitions. [2023-11-19 04:49:14,629 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 2483 transitions. Word has length 34 [2023-11-19 04:49:14,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:14,629 INFO L495 AbstractCegarLoop]: Abstraction has 1806 states and 2483 transitions. [2023-11-19 04:49:14,630 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) [2023-11-19 04:49:14,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 2483 transitions. [2023-11-19 04:49:14,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-19 04:49:14,634 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:14,634 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] [2023-11-19 04:49:14,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:49:14,634 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:14,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:14,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1648462957, now seen corresponding path program 1 times [2023-11-19 04:49:14,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:14,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194752896] [2023-11-19 04:49:14,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:14,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:14,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:14,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:49:14,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:14,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194752896] [2023-11-19 04:49:14,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194752896] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:49:14,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:49:14,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:49:14,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188036218] [2023-11-19 04:49:14,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:14,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:49:14,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:14,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:49:14,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:49:14,863 INFO L87 Difference]: Start difference. First operand 1806 states and 2483 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) [2023-11-19 04:49:17,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:49:18,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:18,840 INFO L93 Difference]: Finished difference Result 1808 states and 2484 transitions. [2023-11-19 04:49:18,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:49:18,841 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 [2023-11-19 04:49:18,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:18,854 INFO L225 Difference]: With dead ends: 1808 [2023-11-19 04:49:18,854 INFO L226 Difference]: Without dead ends: 1805 [2023-11-19 04:49:18,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:49:18,856 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 709 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:18,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 622 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2023-11-19 04:49:18,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2023-11-19 04:49:18,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 1805. [2023-11-19 04:49:18,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1805 states, 1134 states have (on average 1.3324514991181657) internal successors, (1511), 1185 states have internal predecessors, (1511), 486 states have call successors, (486), 187 states have call predecessors, (486), 184 states have return successors, (484), 458 states have call predecessors, (484), 484 states have call successors, (484) [2023-11-19 04:49:19,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1805 states to 1805 states and 2481 transitions. [2023-11-19 04:49:19,005 INFO L78 Accepts]: Start accepts. Automaton has 1805 states and 2481 transitions. Word has length 35 [2023-11-19 04:49:19,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:19,006 INFO L495 AbstractCegarLoop]: Abstraction has 1805 states and 2481 transitions. [2023-11-19 04:49:19,006 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) [2023-11-19 04:49:19,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1805 states and 2481 transitions. [2023-11-19 04:49:19,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-19 04:49:19,008 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:19,008 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] [2023-11-19 04:49:19,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:49:19,008 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:19,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:19,009 INFO L85 PathProgramCache]: Analyzing trace with hash 436920935, now seen corresponding path program 1 times [2023-11-19 04:49:19,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:19,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975845885] [2023-11-19 04:49:19,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:19,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:19,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:19,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:49:19,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:19,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975845885] [2023-11-19 04:49:19,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975845885] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:49:19,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:49:19,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:49:19,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111528446] [2023-11-19 04:49:19,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:19,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:49:19,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:19,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:49:19,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:49:19,199 INFO L87 Difference]: Start difference. First operand 1805 states and 2481 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) [2023-11-19 04:49:22,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:49:24,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:49:24,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:49:24,478 INFO L93 Difference]: Finished difference Result 1807 states and 2482 transitions. [2023-11-19 04:49:24,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:49:24,478 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 [2023-11-19 04:49:24,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:49:24,491 INFO L225 Difference]: With dead ends: 1807 [2023-11-19 04:49:24,491 INFO L226 Difference]: Without dead ends: 1798 [2023-11-19 04:49:24,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:49:24,494 INFO L413 NwaCegarLoop]: 621 mSDtfsCounter, 706 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:49:24,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [706 Valid, 621 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2023-11-19 04:49:24,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2023-11-19 04:49:24,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1798. [2023-11-19 04:49:24,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1128 states have (on average 1.3306737588652482) internal successors, (1501), 1178 states have internal predecessors, (1501), 485 states have call successors, (485), 187 states have call predecessors, (485), 184 states have return successors, (484), 458 states have call predecessors, (484), 484 states have call successors, (484) [2023-11-19 04:49:24,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 2470 transitions. [2023-11-19 04:49:24,739 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 2470 transitions. Word has length 36 [2023-11-19 04:49:24,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:49:24,740 INFO L495 AbstractCegarLoop]: Abstraction has 1798 states and 2470 transitions. [2023-11-19 04:49:24,740 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) [2023-11-19 04:49:24,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 2470 transitions. [2023-11-19 04:49:24,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-19 04:49:24,748 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:49:24,748 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, 1, 1, 1] [2023-11-19 04:49:24,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:49:24,749 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:49:24,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:49:24,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1223961471, now seen corresponding path program 1 times [2023-11-19 04:49:24,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:49:24,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379317560] [2023-11-19 04:49:24,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:49:24,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:49:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:49:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 04:49:25,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:49:25,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379317560] [2023-11-19 04:49:25,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379317560] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:49:25,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:49:25,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:49:25,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803308180] [2023-11-19 04:49:25,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:49:25,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:49:25,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:49:25,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:49:25,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:49:25,045 INFO L87 Difference]: Start difference. First operand 1798 states and 2470 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2023-11-19 04:49:28,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []