./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.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_76e2fcbe-2a4b-446d-8750-84face5b4af9/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76e2fcbe-2a4b-446d-8750-84face5b4af9/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_76e2fcbe-2a4b-446d-8750-84face5b4af9/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76e2fcbe-2a4b-446d-8750-84face5b4af9/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76e2fcbe-2a4b-446d-8750-84face5b4af9/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_76e2fcbe-2a4b-446d-8750-84face5b4af9/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 739f3451e6066963c0b7569760000f821b0e10d41a2bb279dc204ee3e2cd1a3e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:54:40,960 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:54:41,042 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76e2fcbe-2a4b-446d-8750-84face5b4af9/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-19 04:54:41,048 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:54:41,049 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:54:41,089 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:54:41,094 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:54:41,096 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:54:41,097 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:54:41,100 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:54:41,100 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:54:41,102 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:54:41,102 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:54:41,108 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:54:41,109 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:54:41,109 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:54:41,110 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:54:41,110 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:54:41,111 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:54:41,112 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:54:41,112 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:54:41,113 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:54:41,114 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:54:41,115 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:54:41,115 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:54:41,115 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:54:41,116 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:54:41,116 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:54:41,117 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:54:41,117 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:54:41,119 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:54:41,119 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:54:41,119 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:54:41,120 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:54:41,120 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:54:41,120 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:54:41,120 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:54:41,121 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:54:41,121 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:54:41,121 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:54:41,121 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:54:41,122 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:54:41,122 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_76e2fcbe-2a4b-446d-8750-84face5b4af9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76e2fcbe-2a4b-446d-8750-84face5b4af9/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 739f3451e6066963c0b7569760000f821b0e10d41a2bb279dc204ee3e2cd1a3e [2023-11-19 04:54:41,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:54:41,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:54:41,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:54:41,485 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:54:41,485 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:54:41,487 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76e2fcbe-2a4b-446d-8750-84face5b4af9/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i [2023-11-19 04:54:44,857 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:54:45,517 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:54:45,519 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76e2fcbe-2a4b-446d-8750-84face5b4af9/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i [2023-11-19 04:54:45,585 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76e2fcbe-2a4b-446d-8750-84face5b4af9/bin/utaipan-verify-t7M7D8N6sZ/data/b9703b043/6afd90edfea44e039f6c5a0afe727cdd/FLAG922454bc0 [2023-11-19 04:54:45,606 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76e2fcbe-2a4b-446d-8750-84face5b4af9/bin/utaipan-verify-t7M7D8N6sZ/data/b9703b043/6afd90edfea44e039f6c5a0afe727cdd [2023-11-19 04:54:45,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:54:45,618 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:54:45,626 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:54:45,626 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:54:45,633 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:54:45,634 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:54:45" (1/1) ... [2023-11-19 04:54:45,635 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7393f66a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:45, skipping insertion in model container [2023-11-19 04:54:45,636 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:54:45" (1/1) ... [2023-11-19 04:54:45,885 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:54:47,989 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_76e2fcbe-2a4b-446d-8750-84face5b4af9/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i[284626,284639] [2023-11-19 04:54:48,046 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:54:48,083 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:54:48,247 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 %2, %0; setc %1": "+m" (*addr), "=qm" (c): "Ir" (nr): "memory"); [6149-6150] [2023-11-19 04:54:48,249 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, %0; setc %1": "+m" (*addr), "=qm" (c): "Ir" (nr): "memory"); [6158-6159] [2023-11-19 04:54:48,268 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("outb %b0, %w1": : "a" (value), "Nd" (port)); [6355] [2023-11-19 04:54:48,268 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("inb %w1, %b0": "=a" (value): "Nd" (port)); [6363] [2023-11-19 04:54:48,269 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("rep; outsb": "+S" (addr), "+c" (count): "d" (port)); [6370] [2023-11-19 04:54:48,269 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("rep; insb": "+D" (addr), "+c" (count): "d" (port)); [6377] [2023-11-19 04:54:48,566 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_76e2fcbe-2a4b-446d-8750-84face5b4af9/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i[284626,284639] [2023-11-19 04:54:48,586 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:54:48,671 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:54:48,671 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:48 WrapperNode [2023-11-19 04:54:48,672 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:54:48,673 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:54:48,673 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:54:48,673 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:54:48,682 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:48" (1/1) ... [2023-11-19 04:54:48,795 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:48" (1/1) ... [2023-11-19 04:54:48,983 INFO L138 Inliner]: procedures = 228, calls = 2114, calls flagged for inlining = 106, calls inlined = 86, statements flattened = 3361 [2023-11-19 04:54:48,984 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:54:48,985 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:54:48,985 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:54:48,985 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:54:48,996 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:48" (1/1) ... [2023-11-19 04:54:48,997 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:48" (1/1) ... [2023-11-19 04:54:49,032 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:48" (1/1) ... [2023-11-19 04:54:49,032 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:48" (1/1) ... [2023-11-19 04:54:49,221 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:48" (1/1) ... [2023-11-19 04:54:49,243 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:48" (1/1) ... [2023-11-19 04:54:49,271 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:48" (1/1) ... [2023-11-19 04:54:49,293 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:48" (1/1) ... [2023-11-19 04:54:49,334 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:54:49,336 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:54:49,336 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:54:49,336 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:54:49,337 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:48" (1/1) ... [2023-11-19 04:54:49,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:54:49,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76e2fcbe-2a4b-446d-8750-84face5b4af9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:54:49,376 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76e2fcbe-2a4b-446d-8750-84face5b4af9/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:54:49,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76e2fcbe-2a4b-446d-8750-84face5b4af9/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:54:49,426 INFO L130 BoogieDeclarations]: Found specification of procedure insb [2023-11-19 04:54:49,427 INFO L138 BoogieDeclarations]: Found implementation of procedure insb [2023-11-19 04:54:49,428 INFO L130 BoogieDeclarations]: Found specification of procedure WriteW6692 [2023-11-19 04:54:49,428 INFO L138 BoogieDeclarations]: Found implementation of procedure WriteW6692 [2023-11-19 04:54:49,428 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_clear_bchannel [2023-11-19 04:54:49,429 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_clear_bchannel [2023-11-19 04:54:49,429 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-19 04:54:49,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-19 04:54:49,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-19 04:54:49,429 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-19 04:54:49,429 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2023-11-19 04:54:49,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2023-11-19 04:54:49,429 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-19 04:54:49,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-19 04:54:49,430 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_unregister_device [2023-11-19 04:54:49,430 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_unregister_device [2023-11-19 04:54:49,431 INFO L130 BoogieDeclarations]: Found specification of procedure ReadW6692 [2023-11-19 04:54:49,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadW6692 [2023-11-19 04:54:49,431 INFO L130 BoogieDeclarations]: Found specification of procedure W6692B_interrupt [2023-11-19 04:54:49,431 INFO L138 BoogieDeclarations]: Found implementation of procedure W6692B_interrupt [2023-11-19 04:54:49,431 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2023-11-19 04:54:49,432 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2023-11-19 04:54:49,432 INFO L130 BoogieDeclarations]: Found specification of procedure outsb [2023-11-19 04:54:49,432 INFO L138 BoogieDeclarations]: Found implementation of procedure outsb [2023-11-19 04:54:49,433 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-19 04:54:49,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-19 04:54:49,433 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 04:54:49,434 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 04:54:49,434 INFO L130 BoogieDeclarations]: Found specification of procedure W6692_empty_Bfifo [2023-11-19 04:54:49,434 INFO L138 BoogieDeclarations]: Found implementation of procedure W6692_empty_Bfifo [2023-11-19 04:54:49,434 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2023-11-19 04:54:49,434 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2023-11-19 04:54:49,434 INFO L130 BoogieDeclarations]: Found specification of procedure W6692_fill_Bfifo [2023-11-19 04:54:49,434 INFO L138 BoogieDeclarations]: Found implementation of procedure W6692_fill_Bfifo [2023-11-19 04:54:49,435 INFO L130 BoogieDeclarations]: Found specification of procedure ReadW6692B [2023-11-19 04:54:49,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadW6692B [2023-11-19 04:54:49,435 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2023-11-19 04:54:49,435 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2023-11-19 04:54:49,435 INFO L130 BoogieDeclarations]: Found specification of procedure W6692_empty_Dfifo [2023-11-19 04:54:49,435 INFO L138 BoogieDeclarations]: Found implementation of procedure W6692_empty_Dfifo [2023-11-19 04:54:49,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:54:49,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 04:54:49,436 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2023-11-19 04:54:49,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2023-11-19 04:54:49,436 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-19 04:54:49,436 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-19 04:54:49,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:54:49,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 04:54:49,436 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-19 04:54:49,437 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-19 04:54:49,437 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2023-11-19 04:54:49,437 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2023-11-19 04:54:49,437 INFO L130 BoogieDeclarations]: Found specification of procedure w6692_led_handler [2023-11-19 04:54:49,437 INFO L138 BoogieDeclarations]: Found implementation of procedure w6692_led_handler [2023-11-19 04:54:49,437 INFO L130 BoogieDeclarations]: Found specification of procedure send_next [2023-11-19 04:54:49,437 INFO L138 BoogieDeclarations]: Found implementation of procedure send_next [2023-11-19 04:54:49,437 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2023-11-19 04:54:49,438 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2023-11-19 04:54:49,439 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2023-11-19 04:54:49,440 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2023-11-19 04:54:49,440 INFO L130 BoogieDeclarations]: Found specification of procedure WriteW6692B [2023-11-19 04:54:49,440 INFO L138 BoogieDeclarations]: Found implementation of procedure WriteW6692B [2023-11-19 04:54:49,440 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_freebchannel [2023-11-19 04:54:49,440 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_freebchannel [2023-11-19 04:54:49,440 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_freedchannel [2023-11-19 04:54:49,440 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_freedchannel [2023-11-19 04:54:49,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:54:49,441 INFO L130 BoogieDeclarations]: Found specification of procedure ph_command [2023-11-19 04:54:49,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ph_command [2023-11-19 04:54:49,442 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2023-11-19 04:54:49,442 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2023-11-19 04:54:49,442 INFO L130 BoogieDeclarations]: Found specification of procedure skb_trim [2023-11-19 04:54:49,442 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_trim [2023-11-19 04:54:49,442 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2023-11-19 04:54:49,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2023-11-19 04:54:49,443 INFO L130 BoogieDeclarations]: Found specification of procedure _set_debug [2023-11-19 04:54:49,443 INFO L138 BoogieDeclarations]: Found implementation of procedure _set_debug [2023-11-19 04:54:49,443 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2023-11-19 04:54:49,443 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2023-11-19 04:54:49,443 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-19 04:54:49,443 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-19 04:54:49,444 INFO L130 BoogieDeclarations]: Found specification of procedure print_hex_dump [2023-11-19 04:54:49,444 INFO L138 BoogieDeclarations]: Found implementation of procedure print_hex_dump [2023-11-19 04:54:49,444 INFO L130 BoogieDeclarations]: Found specification of procedure disable_hwirq [2023-11-19 04:54:49,445 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_hwirq [2023-11-19 04:54:49,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:54:49,445 INFO L130 BoogieDeclarations]: Found specification of procedure w6692_probe [2023-11-19 04:54:49,445 INFO L138 BoogieDeclarations]: Found implementation of procedure w6692_probe [2023-11-19 04:54:49,445 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_irq_1 [2023-11-19 04:54:49,445 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_irq_1 [2023-11-19 04:54:49,445 INFO L130 BoogieDeclarations]: Found specification of procedure pci_set_drvdata [2023-11-19 04:54:49,445 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_set_drvdata [2023-11-19 04:54:49,446 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_pr_debug [2023-11-19 04:54:49,446 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_pr_debug [2023-11-19 04:54:49,446 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-19 04:54:49,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-19 04:54:49,446 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-19 04:54:49,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-19 04:54:49,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 04:54:49,447 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2023-11-19 04:54:49,447 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2023-11-19 04:54:49,447 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_3 [2023-11-19 04:54:49,447 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_3 [2023-11-19 04:54:49,447 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2023-11-19 04:54:49,448 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2023-11-19 04:54:49,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:54:49,448 INFO L130 BoogieDeclarations]: Found specification of procedure recv_Bchannel [2023-11-19 04:54:49,449 INFO L138 BoogieDeclarations]: Found implementation of procedure recv_Bchannel [2023-11-19 04:54:49,449 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_lock_irqsave [2023-11-19 04:54:49,449 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_lock_irqsave [2023-11-19 04:54:49,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 04:54:49,449 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2023-11-19 04:54:49,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2023-11-19 04:54:49,450 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_3 [2023-11-19 04:54:49,450 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_3 [2023-11-19 04:54:49,450 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_unlock_irqrestore [2023-11-19 04:54:49,450 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_unlock_irqrestore [2023-11-19 04:54:49,451 INFO L130 BoogieDeclarations]: Found specification of procedure W6692_fill_Dfifo [2023-11-19 04:54:49,451 INFO L138 BoogieDeclarations]: Found implementation of procedure W6692_fill_Dfifo [2023-11-19 04:54:49,451 INFO L130 BoogieDeclarations]: Found specification of procedure w6692_mode [2023-11-19 04:54:49,451 INFO L138 BoogieDeclarations]: Found implementation of procedure w6692_mode [2023-11-19 04:54:49,451 INFO L130 BoogieDeclarations]: Found specification of procedure get_next_dframe [2023-11-19 04:54:49,451 INFO L138 BoogieDeclarations]: Found implementation of procedure get_next_dframe [2023-11-19 04:54:49,451 INFO L130 BoogieDeclarations]: Found specification of procedure mI_alloc_skb [2023-11-19 04:54:49,452 INFO L138 BoogieDeclarations]: Found implementation of procedure mI_alloc_skb [2023-11-19 04:54:49,452 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2023-11-19 04:54:49,452 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2023-11-19 04:54:49,452 INFO L130 BoogieDeclarations]: Found specification of procedure l1_event [2023-11-19 04:54:49,452 INFO L138 BoogieDeclarations]: Found implementation of procedure l1_event [2023-11-19 04:54:49,453 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2023-11-19 04:54:49,453 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2023-11-19 04:54:49,453 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~TO~VOID [2023-11-19 04:54:49,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~TO~VOID [2023-11-19 04:54:49,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:54:49,454 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2023-11-19 04:54:49,454 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2023-11-19 04:54:49,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:54:49,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:54:50,110 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:54:50,116 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:54:51,571 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-19 04:54:54,488 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:54:55,785 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:54:55,785 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-19 04:54:55,803 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:54:55 BoogieIcfgContainer [2023-11-19 04:54:55,803 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:54:55,807 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:54:55,807 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:54:55,813 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:54:55,813 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:54:45" (1/3) ... [2023-11-19 04:54:55,816 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d062e75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:54:55, skipping insertion in model container [2023-11-19 04:54:55,816 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:54:48" (2/3) ... [2023-11-19 04:54:55,817 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d062e75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:54:55, skipping insertion in model container [2023-11-19 04:54:55,823 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:54:55" (3/3) ... [2023-11-19 04:54:55,824 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--w6692.ko-entry_point.cil.out.i [2023-11-19 04:54:55,847 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:54:55,847 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:54:55,946 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:54:55,957 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;@7450ddae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:54:55,957 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:54:55,971 INFO L276 IsEmpty]: Start isEmpty. Operand has 969 states, 584 states have (on average 1.345890410958904) internal successors, (786), 639 states have internal predecessors, (786), 321 states have call successors, (321), 63 states have call predecessors, (321), 62 states have return successors, (315), 309 states have call predecessors, (315), 315 states have call successors, (315) [2023-11-19 04:54:55,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-19 04:54:55,986 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:54:55,986 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2023-11-19 04:54:55,987 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:54:55,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:54:55,993 INFO L85 PathProgramCache]: Analyzing trace with hash -2087127217, now seen corresponding path program 1 times [2023-11-19 04:54:56,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:54:56,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279190398] [2023-11-19 04:54:56,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:54:56,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:54:56,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:54:56,989 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-19 04:54:56,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:54:56,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279190398] [2023-11-19 04:54:56,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279190398] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:54:56,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:54:56,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:54:56,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280427846] [2023-11-19 04:54:56,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:54:57,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:54:57,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:54:57,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:54:57,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:54:57,052 INFO L87 Difference]: Start difference. First operand has 969 states, 584 states have (on average 1.345890410958904) internal successors, (786), 639 states have internal predecessors, (786), 321 states have call successors, (321), 63 states have call predecessors, (321), 62 states have return successors, (315), 309 states have call predecessors, (315), 315 states have call successors, (315) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-19 04:54:58,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:54:58,433 INFO L93 Difference]: Finished difference Result 2586 states and 3815 transitions. [2023-11-19 04:54:58,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:54:58,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2023-11-19 04:54:58,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:54:58,472 INFO L225 Difference]: With dead ends: 2586 [2023-11-19 04:54:58,472 INFO L226 Difference]: Without dead ends: 1607 [2023-11-19 04:54:58,487 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 04:54:58,491 INFO L413 NwaCegarLoop]: 1282 mSDtfsCounter, 964 mSDsluCounter, 1258 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 964 SdHoareTripleChecker+Valid, 2540 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:54:58,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [964 Valid, 2540 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 04:54:58,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2023-11-19 04:54:58,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1603. [2023-11-19 04:54:58,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 992 states have (on average 1.3477822580645162) internal successors, (1337), 1085 states have internal predecessors, (1337), 506 states have call successors, (506), 105 states have call predecessors, (506), 104 states have return successors, (505), 492 states have call predecessors, (505), 505 states have call successors, (505) [2023-11-19 04:54:58,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 2348 transitions. [2023-11-19 04:54:58,738 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 2348 transitions. Word has length 49 [2023-11-19 04:54:58,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:54:58,739 INFO L495 AbstractCegarLoop]: Abstraction has 1603 states and 2348 transitions. [2023-11-19 04:54:58,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-19 04:54:58,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 2348 transitions. [2023-11-19 04:54:58,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-19 04:54:58,756 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:54:58,756 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:54:58,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:54:58,756 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:54:58,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:54:58,757 INFO L85 PathProgramCache]: Analyzing trace with hash -853432914, now seen corresponding path program 1 times [2023-11-19 04:54:58,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:54:58,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382222956] [2023-11-19 04:54:58,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:54:58,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:54:58,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:54:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-19 04:54:59,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:54:59,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382222956] [2023-11-19 04:54:59,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382222956] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:54:59,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:54:59,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:54:59,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658120715] [2023-11-19 04:54:59,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:54:59,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:54:59,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:54:59,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:54:59,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:54:59,296 INFO L87 Difference]: Start difference. First operand 1603 states and 2348 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-19 04:55:00,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:55:00,132 INFO L93 Difference]: Finished difference Result 3192 states and 4679 transitions. [2023-11-19 04:55:00,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:55:00,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 75 [2023-11-19 04:55:00,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:55:00,151 INFO L225 Difference]: With dead ends: 3192 [2023-11-19 04:55:00,151 INFO L226 Difference]: Without dead ends: 1603 [2023-11-19 04:55:00,164 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 04:55:00,165 INFO L413 NwaCegarLoop]: 1258 mSDtfsCounter, 0 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2513 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 04:55:00,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2513 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 04:55:00,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2023-11-19 04:55:00,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1603. [2023-11-19 04:55:00,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 992 states have (on average 1.346774193548387) internal successors, (1336), 1085 states have internal predecessors, (1336), 506 states have call successors, (506), 105 states have call predecessors, (506), 104 states have return successors, (505), 492 states have call predecessors, (505), 505 states have call successors, (505) [2023-11-19 04:55:00,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 2347 transitions. [2023-11-19 04:55:00,322 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 2347 transitions. Word has length 75 [2023-11-19 04:55:00,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:55:00,323 INFO L495 AbstractCegarLoop]: Abstraction has 1603 states and 2347 transitions. [2023-11-19 04:55:00,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-19 04:55:00,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 2347 transitions. [2023-11-19 04:55:00,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-19 04:55:00,327 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:55:00,327 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2023-11-19 04:55:00,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:55:00,328 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:55:00,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:55:00,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1389264794, now seen corresponding path program 1 times [2023-11-19 04:55:00,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:55:00,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947740791] [2023-11-19 04:55:00,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:00,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:55:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-11-19 04:55:01,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:55:01,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947740791] [2023-11-19 04:55:01,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947740791] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:55:01,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:55:01,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:55:01,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14232572] [2023-11-19 04:55:01,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:55:01,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:55:01,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:55:01,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:55:01,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:55:01,520 INFO L87 Difference]: Start difference. First operand 1603 states and 2347 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 04:55:02,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:55:02,432 INFO L93 Difference]: Finished difference Result 1636 states and 2374 transitions. [2023-11-19 04:55:02,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:55:02,432 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 87 [2023-11-19 04:55:02,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:55:02,448 INFO L225 Difference]: With dead ends: 1636 [2023-11-19 04:55:02,448 INFO L226 Difference]: Without dead ends: 1633 [2023-11-19 04:55:02,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:55:02,452 INFO L413 NwaCegarLoop]: 1271 mSDtfsCounter, 395 mSDsluCounter, 2171 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 3442 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:55:02,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 3442 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 04:55:02,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2023-11-19 04:55:02,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 1633. [2023-11-19 04:55:02,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1633 states, 1009 states have (on average 1.3419226957383548) internal successors, (1354), 1102 states have internal predecessors, (1354), 509 states have call successors, (509), 115 states have call predecessors, (509), 114 states have return successors, (508), 495 states have call predecessors, (508), 508 states have call successors, (508) [2023-11-19 04:55:02,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1633 states to 1633 states and 2371 transitions. [2023-11-19 04:55:02,565 INFO L78 Accepts]: Start accepts. Automaton has 1633 states and 2371 transitions. Word has length 87 [2023-11-19 04:55:02,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:55:02,565 INFO L495 AbstractCegarLoop]: Abstraction has 1633 states and 2371 transitions. [2023-11-19 04:55:02,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 04:55:02,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1633 states and 2371 transitions. [2023-11-19 04:55:02,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-19 04:55:02,569 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:55:02,569 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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 04:55:02,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:55:02,570 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:55:02,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:55:02,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1839108183, now seen corresponding path program 1 times [2023-11-19 04:55:02,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:55:02,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358840629] [2023-11-19 04:55:02,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:02,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:55:02,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:03,153 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 04:55:03,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:55:03,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358840629] [2023-11-19 04:55:03,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358840629] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:55:03,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:55:03,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:55:03,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040159018] [2023-11-19 04:55:03,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:55:03,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:55:03,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:55:03,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:55:03,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:55:03,158 INFO L87 Difference]: Start difference. First operand 1633 states and 2371 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 04:55:04,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:55:04,656 INFO L93 Difference]: Finished difference Result 4805 states and 6982 transitions. [2023-11-19 04:55:04,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:55:04,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 90 [2023-11-19 04:55:04,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:55:04,685 INFO L225 Difference]: With dead ends: 4805 [2023-11-19 04:55:04,685 INFO L226 Difference]: Without dead ends: 3189 [2023-11-19 04:55:04,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:55:04,702 INFO L413 NwaCegarLoop]: 1257 mSDtfsCounter, 1272 mSDsluCounter, 3747 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1276 SdHoareTripleChecker+Valid, 5004 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:55:04,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1276 Valid, 5004 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-19 04:55:04,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3189 states. [2023-11-19 04:55:04,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3189 to 3173. [2023-11-19 04:55:04,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3173 states, 1973 states have (on average 1.3446528129751647) internal successors, (2653), 2159 states have internal predecessors, (2653), 974 states have call successors, (974), 226 states have call predecessors, (974), 225 states have return successors, (974), 946 states have call predecessors, (974), 973 states have call successors, (974) [2023-11-19 04:55:04,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3173 states to 3173 states and 4601 transitions. [2023-11-19 04:55:04,943 INFO L78 Accepts]: Start accepts. Automaton has 3173 states and 4601 transitions. Word has length 90 [2023-11-19 04:55:04,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:55:04,944 INFO L495 AbstractCegarLoop]: Abstraction has 3173 states and 4601 transitions. [2023-11-19 04:55:04,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 04:55:04,944 INFO L276 IsEmpty]: Start isEmpty. Operand 3173 states and 4601 transitions. [2023-11-19 04:55:04,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-19 04:55:04,947 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:55:04,947 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 04:55:04,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:55:04,948 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:55:04,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:55:04,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1099790311, now seen corresponding path program 1 times [2023-11-19 04:55:04,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:55:04,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313281785] [2023-11-19 04:55:04,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:04,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:55:05,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:05,503 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 04:55:05,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:55:05,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313281785] [2023-11-19 04:55:05,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313281785] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:55:05,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:55:05,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:55:05,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499847190] [2023-11-19 04:55:05,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:55:05,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:55:05,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:55:05,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:55:05,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:55:05,507 INFO L87 Difference]: Start difference. First operand 3173 states and 4601 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 04:55:07,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:55:07,276 INFO L93 Difference]: Finished difference Result 7901 states and 11458 transitions. [2023-11-19 04:55:07,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:55:07,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 87 [2023-11-19 04:55:07,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:55:07,324 INFO L225 Difference]: With dead ends: 7901 [2023-11-19 04:55:07,324 INFO L226 Difference]: Without dead ends: 4745 [2023-11-19 04:55:07,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:55:07,349 INFO L413 NwaCegarLoop]: 1254 mSDtfsCounter, 1277 mSDsluCounter, 3744 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1281 SdHoareTripleChecker+Valid, 4998 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:55:07,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1281 Valid, 4998 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-19 04:55:07,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4745 states. [2023-11-19 04:55:07,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4745 to 4703. [2023-11-19 04:55:07,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4703 states, 2929 states have (on average 1.3465346534653466) internal successors, (3944), 3214 states have internal predecessors, (3944), 1437 states have call successors, (1437), 337 states have call predecessors, (1437), 336 states have return successors, (1438), 1389 states have call predecessors, (1438), 1436 states have call successors, (1438) [2023-11-19 04:55:07,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 6819 transitions. [2023-11-19 04:55:07,926 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 6819 transitions. Word has length 87 [2023-11-19 04:55:07,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:55:07,927 INFO L495 AbstractCegarLoop]: Abstraction has 4703 states and 6819 transitions. [2023-11-19 04:55:07,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 4 states have internal predecessors, (43), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 04:55:07,927 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 6819 transitions. [2023-11-19 04:55:07,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-19 04:55:07,936 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:55:07,936 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 04:55:07,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:55:07,937 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:55:07,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:55:07,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1911104180, now seen corresponding path program 1 times [2023-11-19 04:55:07,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:55:07,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088523579] [2023-11-19 04:55:07,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:07,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:55:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 04:55:08,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:55:08,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088523579] [2023-11-19 04:55:08,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088523579] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:55:08,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:55:08,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:55:08,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513623996] [2023-11-19 04:55:08,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:55:08,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:55:08,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:55:08,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:55:08,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:55:08,566 INFO L87 Difference]: Start difference. First operand 4703 states and 6819 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 04:55:10,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:55:10,222 INFO L93 Difference]: Finished difference Result 9051 states and 13140 transitions. [2023-11-19 04:55:10,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:55:10,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 88 [2023-11-19 04:55:10,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:55:10,268 INFO L225 Difference]: With dead ends: 9051 [2023-11-19 04:55:10,268 INFO L226 Difference]: Without dead ends: 4745 [2023-11-19 04:55:10,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:55:10,299 INFO L413 NwaCegarLoop]: 1257 mSDtfsCounter, 1273 mSDsluCounter, 3747 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 5004 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:55:10,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1277 Valid, 5004 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-19 04:55:10,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4745 states. [2023-11-19 04:55:10,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4745 to 4711. [2023-11-19 04:55:10,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4711 states, 2937 states have (on average 1.345590738849166) internal successors, (3952), 3220 states have internal predecessors, (3952), 1435 states have call successors, (1435), 339 states have call predecessors, (1435), 338 states have return successors, (1436), 1389 states have call predecessors, (1436), 1434 states have call successors, (1436) [2023-11-19 04:55:10,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4711 states to 4711 states and 6823 transitions. [2023-11-19 04:55:10,788 INFO L78 Accepts]: Start accepts. Automaton has 4711 states and 6823 transitions. Word has length 88 [2023-11-19 04:55:10,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:55:10,788 INFO L495 AbstractCegarLoop]: Abstraction has 4711 states and 6823 transitions. [2023-11-19 04:55:10,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 04:55:10,790 INFO L276 IsEmpty]: Start isEmpty. Operand 4711 states and 6823 transitions. [2023-11-19 04:55:10,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-19 04:55:10,793 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:55:10,793 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 04:55:10,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:55:10,793 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:55:10,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:55:10,794 INFO L85 PathProgramCache]: Analyzing trace with hash -2020313194, now seen corresponding path program 1 times [2023-11-19 04:55:10,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:55:10,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915348434] [2023-11-19 04:55:10,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:10,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:55:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:11,293 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 04:55:11,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:55:11,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915348434] [2023-11-19 04:55:11,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915348434] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:55:11,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:55:11,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:55:11,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277422730] [2023-11-19 04:55:11,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:55:11,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:55:11,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:55:11,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:55:11,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:55:11,297 INFO L87 Difference]: Start difference. First operand 4711 states and 6823 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 04:55:12,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:55:12,756 INFO L93 Difference]: Finished difference Result 7933 states and 11468 transitions. [2023-11-19 04:55:12,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:55:12,757 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 89 [2023-11-19 04:55:12,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:55:12,791 INFO L225 Difference]: With dead ends: 7933 [2023-11-19 04:55:12,791 INFO L226 Difference]: Without dead ends: 3617 [2023-11-19 04:55:12,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:55:12,818 INFO L413 NwaCegarLoop]: 1262 mSDtfsCounter, 1271 mSDsluCounter, 3757 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1275 SdHoareTripleChecker+Valid, 5019 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:55:12,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1275 Valid, 5019 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 04:55:12,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3617 states. [2023-11-19 04:55:13,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3617 to 3589. [2023-11-19 04:55:13,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3589 states, 2243 states have (on average 1.3392777530093625) internal successors, (3004), 2434 states have internal predecessors, (3004), 1073 states have call successors, (1073), 273 states have call predecessors, (1073), 272 states have return successors, (1074), 1041 states have call predecessors, (1074), 1072 states have call successors, (1074) [2023-11-19 04:55:13,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3589 states to 3589 states and 5151 transitions. [2023-11-19 04:55:13,168 INFO L78 Accepts]: Start accepts. Automaton has 3589 states and 5151 transitions. Word has length 89 [2023-11-19 04:55:13,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:55:13,168 INFO L495 AbstractCegarLoop]: Abstraction has 3589 states and 5151 transitions. [2023-11-19 04:55:13,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 3 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 04:55:13,169 INFO L276 IsEmpty]: Start isEmpty. Operand 3589 states and 5151 transitions. [2023-11-19 04:55:13,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-19 04:55:13,172 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:55:13,173 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 04:55:13,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 04:55:13,173 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:55:13,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:55:13,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1878286465, now seen corresponding path program 1 times [2023-11-19 04:55:13,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:55:13,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838181529] [2023-11-19 04:55:13,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:13,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:55:13,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-19 04:55:13,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:55:13,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838181529] [2023-11-19 04:55:13,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838181529] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:55:13,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518582987] [2023-11-19 04:55:13,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:13,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:55:13,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76e2fcbe-2a4b-446d-8750-84face5b4af9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:55:13,987 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76e2fcbe-2a4b-446d-8750-84face5b4af9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:55:14,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76e2fcbe-2a4b-446d-8750-84face5b4af9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:55:14,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:14,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 3037 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 04:55:15,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:15,176 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 04:55:15,176 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:55:15,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518582987] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:55:15,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:55:15,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2023-11-19 04:55:15,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946565499] [2023-11-19 04:55:15,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:55:15,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:55:15,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:55:15,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:55:15,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-11-19 04:55:15,179 INFO L87 Difference]: Start difference. First operand 3589 states and 5151 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-19 04:55:17,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:55:17,638 INFO L93 Difference]: Finished difference Result 8787 states and 12624 transitions. [2023-11-19 04:55:17,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 04:55:17,638 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 100 [2023-11-19 04:55:17,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:55:17,690 INFO L225 Difference]: With dead ends: 8787 [2023-11-19 04:55:17,690 INFO L226 Difference]: Without dead ends: 5611 [2023-11-19 04:55:17,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-11-19 04:55:17,708 INFO L413 NwaCegarLoop]: 2045 mSDtfsCounter, 1298 mSDsluCounter, 9425 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1302 SdHoareTripleChecker+Valid, 11470 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:55:17,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1302 Valid, 11470 Invalid, 1391 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 1389 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-19 04:55:17,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5611 states. [2023-11-19 04:55:18,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5611 to 5549. [2023-11-19 04:55:18,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 3481 states have (on average 1.3404194197069808) internal successors, (4666), 3778 states have internal predecessors, (4666), 1637 states have call successors, (1637), 427 states have call predecessors, (1637), 430 states have return successors, (1650), 1583 states have call predecessors, (1650), 1636 states have call successors, (1650) [2023-11-19 04:55:18,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 7953 transitions. [2023-11-19 04:55:18,073 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 7953 transitions. Word has length 100 [2023-11-19 04:55:18,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:55:18,074 INFO L495 AbstractCegarLoop]: Abstraction has 5549 states and 7953 transitions. [2023-11-19 04:55:18,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-19 04:55:18,075 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 7953 transitions. [2023-11-19 04:55:18,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-19 04:55:18,079 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:55:18,080 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 04:55:18,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76e2fcbe-2a4b-446d-8750-84face5b4af9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:55:18,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76e2fcbe-2a4b-446d-8750-84face5b4af9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:55:18,290 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:55:18,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:55:18,290 INFO L85 PathProgramCache]: Analyzing trace with hash 693301705, now seen corresponding path program 1 times [2023-11-19 04:55:18,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:55:18,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075254294] [2023-11-19 04:55:18,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:18,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:55:18,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:19,235 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 04:55:19,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:55:19,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075254294] [2023-11-19 04:55:19,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075254294] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:55:19,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121327699] [2023-11-19 04:55:19,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:19,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:55:19,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76e2fcbe-2a4b-446d-8750-84face5b4af9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:55:19,242 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76e2fcbe-2a4b-446d-8750-84face5b4af9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:55:19,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76e2fcbe-2a4b-446d-8750-84face5b4af9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:55:20,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:20,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 3039 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 04:55:20,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:20,412 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 04:55:20,412 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:55:20,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121327699] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:55:20,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:55:20,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2023-11-19 04:55:20,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142713639] [2023-11-19 04:55:20,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:55:20,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:55:20,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:55:20,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:55:20,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-11-19 04:55:20,416 INFO L87 Difference]: Start difference. First operand 5549 states and 7953 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-19 04:55:22,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:55:22,980 INFO L93 Difference]: Finished difference Result 12729 states and 18248 transitions. [2023-11-19 04:55:22,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 04:55:22,981 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 101 [2023-11-19 04:55:22,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:55:23,029 INFO L225 Difference]: With dead ends: 12729 [2023-11-19 04:55:23,029 INFO L226 Difference]: Without dead ends: 7593 [2023-11-19 04:55:23,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-11-19 04:55:23,055 INFO L413 NwaCegarLoop]: 2051 mSDtfsCounter, 1298 mSDsluCounter, 9437 mSDsCounter, 0 mSdLazyCounter, 1391 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1302 SdHoareTripleChecker+Valid, 11488 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:55:23,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1302 Valid, 11488 Invalid, 1393 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 1391 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-19 04:55:23,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7593 states. [2023-11-19 04:55:23,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7593 to 6936. [2023-11-19 04:55:23,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6936 states, 4366 states have (on average 1.3394411360513054) internal successors, (5848), 4726 states have internal predecessors, (5848), 2017 states have call successors, (2017), 542 states have call predecessors, (2017), 552 states have return successors, (2045), 1948 states have call predecessors, (2045), 2016 states have call successors, (2045) [2023-11-19 04:55:23,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6936 states to 6936 states and 9910 transitions. [2023-11-19 04:55:23,571 INFO L78 Accepts]: Start accepts. Automaton has 6936 states and 9910 transitions. Word has length 101 [2023-11-19 04:55:23,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:55:23,572 INFO L495 AbstractCegarLoop]: Abstraction has 6936 states and 9910 transitions. [2023-11-19 04:55:23,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-19 04:55:23,572 INFO L276 IsEmpty]: Start isEmpty. Operand 6936 states and 9910 transitions. [2023-11-19 04:55:23,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-19 04:55:23,576 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:55:23,576 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 04:55:23,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76e2fcbe-2a4b-446d-8750-84face5b4af9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:55:23,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76e2fcbe-2a4b-446d-8750-84face5b4af9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:55:23,793 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:55:23,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:55:23,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1404926810, now seen corresponding path program 1 times [2023-11-19 04:55:23,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:55:23,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196114627] [2023-11-19 04:55:23,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:23,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:55:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:24,497 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 04:55:24,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:55:24,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196114627] [2023-11-19 04:55:24,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196114627] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:55:24,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232905727] [2023-11-19 04:55:24,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:24,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:55:24,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76e2fcbe-2a4b-446d-8750-84face5b4af9/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:55:24,499 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76e2fcbe-2a4b-446d-8750-84face5b4af9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:55:24,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76e2fcbe-2a4b-446d-8750-84face5b4af9/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process