./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-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9aa1f9-088f-411b-aa35-6c7d1a0aaffe/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9aa1f9-088f-411b-aa35-6c7d1a0aaffe/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9aa1f9-088f-411b-aa35-6c7d1a0aaffe/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9aa1f9-088f-411b-aa35-6c7d1a0aaffe/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9aa1f9-088f-411b-aa35-6c7d1a0aaffe/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9aa1f9-088f-411b-aa35-6c7d1a0aaffe/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 62515c851d4d8c80398352da8857a26e67ae776a292d33d62b0afdc92addb3ad --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:22:53,033 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:22:53,105 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9aa1f9-088f-411b-aa35-6c7d1a0aaffe/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:22:53,112 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:22:53,112 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:22:53,141 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:22:53,141 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:22:53,142 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:22:53,143 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:22:53,143 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:22:53,144 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:22:53,145 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:22:53,145 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:22:53,146 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:22:53,146 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:22:53,147 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:22:53,148 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:22:53,148 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:22:53,149 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:22:53,150 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:22:53,150 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:22:53,151 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:22:53,152 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:22:53,152 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:22:53,153 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:22:53,153 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:22:53,154 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:22:53,154 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:22:53,155 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:22:53,155 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:22:53,156 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:22:53,156 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:22:53,156 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:22:53,157 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:22:53,157 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:22:53,157 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:22:53,158 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:22:53,158 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:22:53,158 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:22:53,158 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:22:53,159 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:22:53,159 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:22:53,159 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:22:53,160 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:22:53,160 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_5a9aa1f9-088f-411b-aa35-6c7d1a0aaffe/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9aa1f9-088f-411b-aa35-6c7d1a0aaffe/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62515c851d4d8c80398352da8857a26e67ae776a292d33d62b0afdc92addb3ad [2023-11-23 21:22:53,423 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:22:53,470 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:22:53,474 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:22:53,476 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:22:53,477 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:22:53,479 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9aa1f9-088f-411b-aa35-6c7d1a0aaffe/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i [2023-11-23 21:22:56,784 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:22:57,407 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:22:57,407 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9aa1f9-088f-411b-aa35-6c7d1a0aaffe/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i [2023-11-23 21:22:57,459 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9aa1f9-088f-411b-aa35-6c7d1a0aaffe/bin/utaipan-verify-mE87zJ7Ire/data/105ce525f/74f6e4134c4b43de9f92b08b48f91ae2/FLAG7c4c57e07 [2023-11-23 21:22:57,477 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9aa1f9-088f-411b-aa35-6c7d1a0aaffe/bin/utaipan-verify-mE87zJ7Ire/data/105ce525f/74f6e4134c4b43de9f92b08b48f91ae2 [2023-11-23 21:22:57,485 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:22:57,487 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:22:57,492 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:22:57,492 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:22:57,498 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:22:57,499 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:22:57" (1/1) ... [2023-11-23 21:22:57,500 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23537907 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:57, skipping insertion in model container [2023-11-23 21:22:57,500 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:22:57" (1/1) ... [2023-11-23 21:22:57,702 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:22:59,387 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_5a9aa1f9-088f-411b-aa35-6c7d1a0aaffe/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i[217361,217374] [2023-11-23 21:22:59,566 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:22:59,601 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:22:59,794 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; bts %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [4245] [2023-11-23 21:22:59,796 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; btr %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr)); [4252] [2023-11-23 21:22:59,821 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("bsrl %1,%0": "=r" (r): "rm" (x), "0" (-1)); [4266] [2023-11-23 21:22:59,822 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("661:\n\tcall __sw_hweight32\n662:\n.skip -(((6651f-6641f)-(662b-661b)) > 0) * ((6651f-6641f)-(662b-661b)),0x90\n663:\n.pushsection .altinstructions,\"a\"\n .long 661b - .\n .long 6641f - .\n .word ( 4*32+23)\n .byte 663b-661b\n .byte 6651f-6641f\n .byte 663b-662b\n.popsection\n.pushsection .altinstr_replacement, \"ax\"\n6641:\n\t.byte 0xf3,0x40,0x0f,0xb8,0xc7\n6651:\n\t.popsection": "=a" (res): "D" (w)); [4275] [2023-11-23 21:22:59,903 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"/work/ldvuser/mutilin/launch/work/current--X--drivers/--X--defaultlinux-4.2-rc1.tar.xz--X--32_7a--X--cpachecker/linux-4.2-rc1.tar.xz/csd_deg_dscv/988/dscv_tempdir/dscv/ri/32_7a/drivers/md/dm-raid.c"), "i" (791), "i" (12UL)); [5389-5390] [2023-11-23 21:23:00,130 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_5a9aa1f9-088f-411b-aa35-6c7d1a0aaffe/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i[217361,217374] [2023-11-23 21:23:00,150 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:23:00,237 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:23:00,237 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:00 WrapperNode [2023-11-23 21:23:00,238 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:23:00,239 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:23:00,239 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:23:00,239 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:23:00,248 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:00" (1/1) ... [2023-11-23 21:23:00,332 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:00" (1/1) ... [2023-11-23 21:23:00,602 INFO L138 Inliner]: procedures = 221, calls = 1690, calls flagged for inlining = 84, calls inlined = 76, statements flattened = 4850 [2023-11-23 21:23:00,603 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:23:00,604 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:23:00,604 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:23:00,604 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:23:00,613 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:00" (1/1) ... [2023-11-23 21:23:00,614 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:00" (1/1) ... [2023-11-23 21:23:00,638 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:00" (1/1) ... [2023-11-23 21:23:00,639 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:00" (1/1) ... [2023-11-23 21:23:00,747 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:00" (1/1) ... [2023-11-23 21:23:00,770 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:00" (1/1) ... [2023-11-23 21:23:00,789 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:00" (1/1) ... [2023-11-23 21:23:00,816 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:00" (1/1) ... [2023-11-23 21:23:00,862 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:23:00,864 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:23:00,864 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:23:00,865 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:23:00,865 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:00" (1/1) ... [2023-11-23 21:23:00,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:23:00,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9aa1f9-088f-411b-aa35-6c7d1a0aaffe/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:00,901 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9aa1f9-088f-411b-aa35-6c7d1a0aaffe/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:23:00,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a9aa1f9-088f-411b-aa35-6c7d1a0aaffe/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:23:00,941 INFO L130 BoogieDeclarations]: Found specification of procedure dm_table_get_mode [2023-11-23 21:23:00,942 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_table_get_mode [2023-11-23 21:23:00,943 INFO L130 BoogieDeclarations]: Found specification of procedure bdev_get_queue [2023-11-23 21:23:00,943 INFO L138 BoogieDeclarations]: Found implementation of procedure bdev_get_queue [2023-11-23 21:23:00,943 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 21:23:00,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 21:23:00,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-23 21:23:00,944 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-23 21:23:00,944 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2023-11-23 21:23:00,944 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2023-11-23 21:23:00,944 INFO L130 BoogieDeclarations]: Found specification of procedure raid10_md_layout_to_format [2023-11-23 21:23:00,944 INFO L138 BoogieDeclarations]: Found implementation of procedure raid10_md_layout_to_format [2023-11-23 21:23:00,945 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 21:23:00,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 21:23:00,946 INFO L130 BoogieDeclarations]: Found specification of procedure raid_io_hints [2023-11-23 21:23:00,946 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_io_hints [2023-11-23 21:23:00,947 INFO L130 BoogieDeclarations]: Found specification of procedure raid_message [2023-11-23 21:23:00,947 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_message [2023-11-23 21:23:00,948 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 21:23:00,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 21:23:00,949 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2023-11-23 21:23:00,949 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2023-11-23 21:23:00,949 INFO L130 BoogieDeclarations]: Found specification of procedure raid10_md_layout_to_copies [2023-11-23 21:23:00,950 INFO L138 BoogieDeclarations]: Found implementation of procedure raid10_md_layout_to_copies [2023-11-23 21:23:00,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-23 21:23:00,952 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-23 21:23:00,952 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:23:00,953 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:23:00,953 INFO L130 BoogieDeclarations]: Found specification of procedure context_free [2023-11-23 21:23:00,953 INFO L138 BoogieDeclarations]: Found implementation of procedure context_free [2023-11-23 21:23:00,954 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-11-23 21:23:00,954 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-11-23 21:23:00,954 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2023-11-23 21:23:00,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2023-11-23 21:23:00,955 INFO L130 BoogieDeclarations]: Found specification of procedure super_validate [2023-11-23 21:23:00,955 INFO L138 BoogieDeclarations]: Found implementation of procedure super_validate [2023-11-23 21:23:00,955 INFO L130 BoogieDeclarations]: Found specification of procedure do_table_event [2023-11-23 21:23:00,955 INFO L138 BoogieDeclarations]: Found implementation of procedure do_table_event [2023-11-23 21:23:00,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:23:00,956 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2023-11-23 21:23:00,956 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2023-11-23 21:23:00,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:23:00,956 INFO L130 BoogieDeclarations]: Found specification of procedure sync_page_io [2023-11-23 21:23:00,956 INFO L138 BoogieDeclarations]: Found implementation of procedure sync_page_io [2023-11-23 21:23:00,957 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2023-11-23 21:23:00,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2023-11-23 21:23:00,957 INFO L130 BoogieDeclarations]: Found specification of procedure to_sector [2023-11-23 21:23:00,957 INFO L138 BoogieDeclarations]: Found implementation of procedure to_sector [2023-11-23 21:23:00,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:23:00,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:23:00,958 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-23 21:23:00,958 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-23 21:23:00,958 INFO L130 BoogieDeclarations]: Found specification of procedure raid_iterate_devices [2023-11-23 21:23:00,959 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_iterate_devices [2023-11-23 21:23:00,959 INFO L130 BoogieDeclarations]: Found specification of procedure dm_put_device [2023-11-23 21:23:00,959 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_put_device [2023-11-23 21:23:00,960 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_reconfig_mutex_of_mddev [2023-11-23 21:23:00,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_reconfig_mutex_of_mddev [2023-11-23 21:23:00,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:23:00,961 INFO L130 BoogieDeclarations]: Found specification of procedure mddev_suspend [2023-11-23 21:23:00,962 INFO L138 BoogieDeclarations]: Found implementation of procedure mddev_suspend [2023-11-23 21:23:00,962 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2023-11-23 21:23:00,962 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2023-11-23 21:23:00,962 INFO L130 BoogieDeclarations]: Found specification of procedure super_sync [2023-11-23 21:23:00,962 INFO L138 BoogieDeclarations]: Found implementation of procedure super_sync [2023-11-23 21:23:00,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:23:00,963 INFO L130 BoogieDeclarations]: Found specification of procedure is_power_of_2 [2023-11-23 21:23:00,963 INFO L138 BoogieDeclarations]: Found implementation of procedure is_power_of_2 [2023-11-23 21:23:00,963 INFO L130 BoogieDeclarations]: Found specification of procedure md_wakeup_thread [2023-11-23 21:23:00,964 INFO L138 BoogieDeclarations]: Found implementation of procedure md_wakeup_thread [2023-11-23 21:23:00,964 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-23 21:23:00,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-23 21:23:00,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:23:00,964 INFO L130 BoogieDeclarations]: Found specification of procedure raid_merge [2023-11-23 21:23:00,965 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_merge [2023-11-23 21:23:00,965 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-11-23 21:23:00,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-11-23 21:23:00,965 INFO L130 BoogieDeclarations]: Found specification of procedure raid_map [2023-11-23 21:23:00,965 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_map [2023-11-23 21:23:00,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:23:00,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:23:00,967 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2023-11-23 21:23:00,967 INFO L138 BoogieDeclarations]: Found implementation of procedure strcasecmp [2023-11-23 21:23:00,968 INFO L130 BoogieDeclarations]: Found specification of procedure scnprintf [2023-11-23 21:23:00,968 INFO L138 BoogieDeclarations]: Found implementation of procedure scnprintf [2023-11-23 21:23:00,968 INFO L130 BoogieDeclarations]: Found specification of procedure md_stop [2023-11-23 21:23:00,968 INFO L138 BoogieDeclarations]: Found implementation of procedure md_stop [2023-11-23 21:23:00,968 INFO L130 BoogieDeclarations]: Found specification of procedure raid_status [2023-11-23 21:23:00,968 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_status [2023-11-23 21:23:00,969 INFO L130 BoogieDeclarations]: Found specification of procedure kstrtoul [2023-11-23 21:23:00,969 INFO L138 BoogieDeclarations]: Found implementation of procedure kstrtoul [2023-11-23 21:23:00,969 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-23 21:23:00,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-23 21:23:00,969 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2023-11-23 21:23:00,970 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2023-11-23 21:23:00,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:23:00,970 INFO L130 BoogieDeclarations]: Found specification of procedure raid_dtr [2023-11-23 21:23:00,970 INFO L138 BoogieDeclarations]: Found implementation of procedure raid_dtr [2023-11-23 21:23:00,970 INFO L130 BoogieDeclarations]: Found specification of procedure dm_get_device [2023-11-23 21:23:00,970 INFO L138 BoogieDeclarations]: Found implementation of procedure dm_get_device [2023-11-23 21:23:00,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:23:00,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:23:00,971 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-11-23 21:23:00,971 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-11-23 21:23:01,556 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:23:01,560 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:23:02,109 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 21:23:06,074 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:23:07,426 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:23:07,426 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:23:07,428 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:23:07 BoogieIcfgContainer [2023-11-23 21:23:07,428 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:23:07,431 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:23:07,431 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:23:07,434 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:23:07,434 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:22:57" (1/3) ... [2023-11-23 21:23:07,435 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b09d1d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:23:07, skipping insertion in model container [2023-11-23 21:23:07,435 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:00" (2/3) ... [2023-11-23 21:23:07,436 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b09d1d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:23:07, skipping insertion in model container [2023-11-23 21:23:07,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:23:07" (3/3) ... [2023-11-23 21:23:07,437 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--md--dm-raid.ko-entry_point.cil.out.i [2023-11-23 21:23:07,458 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:23:07,458 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:23:07,533 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:23:07,540 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;@2238258f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:23:07,540 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:23:07,549 INFO L276 IsEmpty]: Start isEmpty. Operand has 1049 states, 735 states have (on average 1.4408163265306122) internal successors, (1059), 756 states have internal predecessors, (1059), 267 states have call successors, (267), 46 states have call predecessors, (267), 45 states have return successors, (263), 259 states have call predecessors, (263), 263 states have call successors, (263) [2023-11-23 21:23:07,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-11-23 21:23:07,567 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:07,568 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:07,568 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:23:07,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:07,574 INFO L85 PathProgramCache]: Analyzing trace with hash -233947690, now seen corresponding path program 1 times [2023-11-23 21:23:07,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:07,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323263406] [2023-11-23 21:23:07,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:07,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:08,809 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2023-11-23 21:23:08,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:08,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323263406] [2023-11-23 21:23:08,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323263406] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:08,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:08,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:23:08,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663336104] [2023-11-23 21:23:08,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:08,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:23:08,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:08,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:23:08,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:08,865 INFO L87 Difference]: Start difference. First operand has 1049 states, 735 states have (on average 1.4408163265306122) internal successors, (1059), 756 states have internal predecessors, (1059), 267 states have call successors, (267), 46 states have call predecessors, (267), 45 states have return successors, (263), 259 states have call predecessors, (263), 263 states have call successors, (263) Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2023-11-23 21:23:10,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:23:13,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:13,190 INFO L93 Difference]: Finished difference Result 3051 states and 4635 transitions. [2023-11-23 21:23:13,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:23:13,193 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 170 [2023-11-23 21:23:13,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:13,225 INFO L225 Difference]: With dead ends: 3051 [2023-11-23 21:23:13,225 INFO L226 Difference]: Without dead ends: 2023 [2023-11-23 21:23:13,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:13,241 INFO L413 NwaCegarLoop]: 1436 mSDtfsCounter, 1498 mSDsluCounter, 1426 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 2862 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:13,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1498 Valid, 2862 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-11-23 21:23:13,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2023-11-23 21:23:13,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 2020. [2023-11-23 21:23:13,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 1433 states have (on average 1.4375436147941383) internal successors, (2060), 1459 states have internal predecessors, (2060), 501 states have call successors, (501), 86 states have call predecessors, (501), 85 states have return successors, (496), 488 states have call predecessors, (496), 496 states have call successors, (496) [2023-11-23 21:23:13,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 3057 transitions. [2023-11-23 21:23:13,559 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 3057 transitions. Word has length 170 [2023-11-23 21:23:13,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:13,566 INFO L495 AbstractCegarLoop]: Abstraction has 2020 states and 3057 transitions. [2023-11-23 21:23:13,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2023-11-23 21:23:13,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 3057 transitions. [2023-11-23 21:23:13,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-11-23 21:23:13,584 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:13,585 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:13,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:23:13,586 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:23:13,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:13,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1303639742, now seen corresponding path program 1 times [2023-11-23 21:23:13,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:13,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071204180] [2023-11-23 21:23:13,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:13,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:13,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:14,118 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2023-11-23 21:23:14,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:14,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071204180] [2023-11-23 21:23:14,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071204180] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:14,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:14,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:23:14,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970504453] [2023-11-23 21:23:14,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:14,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:23:14,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:14,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:23:14,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:14,125 INFO L87 Difference]: Start difference. First operand 2020 states and 3057 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-23 21:23:16,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:23:18,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-23 21:23:19,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:19,117 INFO L93 Difference]: Finished difference Result 2022 states and 3058 transitions. [2023-11-23 21:23:19,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:23:19,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 177 [2023-11-23 21:23:19,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:19,138 INFO L225 Difference]: With dead ends: 2022 [2023-11-23 21:23:19,138 INFO L226 Difference]: Without dead ends: 2019 [2023-11-23 21:23:19,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:19,142 INFO L413 NwaCegarLoop]: 1421 mSDtfsCounter, 1525 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1525 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:19,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1525 Valid, 1421 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 2 Unknown, 0 Unchecked, 4.9s Time] [2023-11-23 21:23:19,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2023-11-23 21:23:19,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 2019. [2023-11-23 21:23:19,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2019 states, 1433 states have (on average 1.4368457780879273) internal successors, (2059), 1458 states have internal predecessors, (2059), 500 states have call successors, (500), 86 states have call predecessors, (500), 85 states have return successors, (496), 488 states have call predecessors, (496), 496 states have call successors, (496) [2023-11-23 21:23:19,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 3055 transitions. [2023-11-23 21:23:19,274 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 3055 transitions. Word has length 177 [2023-11-23 21:23:19,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:19,275 INFO L495 AbstractCegarLoop]: Abstraction has 2019 states and 3055 transitions. [2023-11-23 21:23:19,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-23 21:23:19,276 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 3055 transitions. [2023-11-23 21:23:19,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-11-23 21:23:19,284 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:19,284 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:19,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:23:19,285 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:23:19,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:19,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1757744437, now seen corresponding path program 1 times [2023-11-23 21:23:19,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:19,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726489156] [2023-11-23 21:23:19,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:19,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:19,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:19,732 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2023-11-23 21:23:19,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:19,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726489156] [2023-11-23 21:23:19,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726489156] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:19,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:19,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:23:19,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406397942] [2023-11-23 21:23:19,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:19,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:23:19,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:19,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:23:19,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:19,736 INFO L87 Difference]: Start difference. First operand 2019 states and 3055 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-23 21:23:21,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:23:23,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:23,246 INFO L93 Difference]: Finished difference Result 2021 states and 3056 transitions. [2023-11-23 21:23:23,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:23:23,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 178 [2023-11-23 21:23:23,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:23,264 INFO L225 Difference]: With dead ends: 2021 [2023-11-23 21:23:23,264 INFO L226 Difference]: Without dead ends: 2018 [2023-11-23 21:23:23,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:23,267 INFO L413 NwaCegarLoop]: 1419 mSDtfsCounter, 1522 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1522 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:23,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1522 Valid, 1419 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 146 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2023-11-23 21:23:23,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2023-11-23 21:23:23,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 2018. [2023-11-23 21:23:23,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 1433 states have (on average 1.4361479413817166) internal successors, (2058), 1457 states have internal predecessors, (2058), 499 states have call successors, (499), 86 states have call predecessors, (499), 85 states have return successors, (496), 488 states have call predecessors, (496), 496 states have call successors, (496) [2023-11-23 21:23:23,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 3053 transitions. [2023-11-23 21:23:23,397 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 3053 transitions. Word has length 178 [2023-11-23 21:23:23,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:23,399 INFO L495 AbstractCegarLoop]: Abstraction has 2018 states and 3053 transitions. [2023-11-23 21:23:23,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-23 21:23:23,402 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 3053 transitions. [2023-11-23 21:23:23,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-11-23 21:23:23,406 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:23,406 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:23,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:23:23,407 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:23:23,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:23,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1344874335, now seen corresponding path program 1 times [2023-11-23 21:23:23,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:23,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759528960] [2023-11-23 21:23:23,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:23,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:23,762 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2023-11-23 21:23:23,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:23,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759528960] [2023-11-23 21:23:23,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759528960] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:23,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:23,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:23:23,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861414658] [2023-11-23 21:23:23,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:23,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:23:23,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:23,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:23:23,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:23,769 INFO L87 Difference]: Start difference. First operand 2018 states and 3053 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-23 21:23:25,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:25,303 INFO L93 Difference]: Finished difference Result 2020 states and 3054 transitions. [2023-11-23 21:23:25,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:23:25,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 179 [2023-11-23 21:23:25,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:25,318 INFO L225 Difference]: With dead ends: 2020 [2023-11-23 21:23:25,319 INFO L226 Difference]: Without dead ends: 2017 [2023-11-23 21:23:25,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:25,321 INFO L413 NwaCegarLoop]: 1417 mSDtfsCounter, 1519 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1519 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:25,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1519 Valid, 1417 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-23 21:23:25,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2023-11-23 21:23:25,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 2017. [2023-11-23 21:23:25,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 1433 states have (on average 1.435450104675506) internal successors, (2057), 1456 states have internal predecessors, (2057), 498 states have call successors, (498), 86 states have call predecessors, (498), 85 states have return successors, (496), 488 states have call predecessors, (496), 496 states have call successors, (496) [2023-11-23 21:23:25,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 3051 transitions. [2023-11-23 21:23:25,457 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 3051 transitions. Word has length 179 [2023-11-23 21:23:25,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:25,458 INFO L495 AbstractCegarLoop]: Abstraction has 2017 states and 3051 transitions. [2023-11-23 21:23:25,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-23 21:23:25,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 3051 transitions. [2023-11-23 21:23:25,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-11-23 21:23:25,461 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:25,461 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:25,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:23:25,462 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:23:25,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:25,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1258196408, now seen corresponding path program 1 times [2023-11-23 21:23:25,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:25,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682041830] [2023-11-23 21:23:25,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:25,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:25,770 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2023-11-23 21:23:25,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:25,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682041830] [2023-11-23 21:23:25,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682041830] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:25,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:25,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:23:25,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126775325] [2023-11-23 21:23:25,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:25,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:23:25,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:25,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:23:25,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:25,773 INFO L87 Difference]: Start difference. First operand 2017 states and 3051 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-23 21:23:29,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:23:32,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-11-23 21:23:32,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:32,633 INFO L93 Difference]: Finished difference Result 3963 states and 6002 transitions. [2023-11-23 21:23:32,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:23:32,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 180 [2023-11-23 21:23:32,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:32,665 INFO L225 Difference]: With dead ends: 3963 [2023-11-23 21:23:32,666 INFO L226 Difference]: Without dead ends: 3954 [2023-11-23 21:23:32,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:32,671 INFO L413 NwaCegarLoop]: 1419 mSDtfsCounter, 1498 mSDsluCounter, 1358 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 2777 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:32,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1498 Valid, 2777 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 289 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2023-11-23 21:23:32,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3954 states. [2023-11-23 21:23:32,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3954 to 3954. [2023-11-23 21:23:32,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3954 states, 2818 states have (on average 1.4375443577004967) internal successors, (4051), 2861 states have internal predecessors, (4051), 970 states have call successors, (970), 168 states have call predecessors, (970), 165 states have return successors, (968), 950 states have call predecessors, (968), 968 states have call successors, (968) [2023-11-23 21:23:32,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3954 states to 3954 states and 5989 transitions. [2023-11-23 21:23:32,999 INFO L78 Accepts]: Start accepts. Automaton has 3954 states and 5989 transitions. Word has length 180 [2023-11-23 21:23:33,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:33,000 INFO L495 AbstractCegarLoop]: Abstraction has 3954 states and 5989 transitions. [2023-11-23 21:23:33,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-23 21:23:33,001 INFO L276 IsEmpty]: Start isEmpty. Operand 3954 states and 5989 transitions. [2023-11-23 21:23:33,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2023-11-23 21:23:33,018 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:33,018 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:33,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:23:33,019 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:23:33,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:33,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1423990551, now seen corresponding path program 1 times [2023-11-23 21:23:33,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:33,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660378794] [2023-11-23 21:23:33,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:33,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:33,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:33,467 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2023-11-23 21:23:33,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:33,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660378794] [2023-11-23 21:23:33,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660378794] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:33,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:33,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:23:33,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219547856] [2023-11-23 21:23:33,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:33,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:23:33,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:33,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:23:33,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:33,472 INFO L87 Difference]: Start difference. First operand 3954 states and 5989 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-11-23 21:23:35,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:23:37,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:23:39,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:39,418 INFO L93 Difference]: Finished difference Result 8050 states and 12183 transitions. [2023-11-23 21:23:39,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:23:39,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 258 [2023-11-23 21:23:39,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:39,453 INFO L225 Difference]: With dead ends: 8050 [2023-11-23 21:23:39,453 INFO L226 Difference]: Without dead ends: 4131 [2023-11-23 21:23:39,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:23:39,474 INFO L413 NwaCegarLoop]: 1427 mSDtfsCounter, 126 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 2690 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:39,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 2690 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-11-23 21:23:39,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4131 states. [2023-11-23 21:23:39,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4131 to 4123. [2023-11-23 21:23:39,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4123 states, 2957 states have (on average 1.4389584037876226) internal successors, (4255), 3000 states have internal predecessors, (4255), 990 states have call successors, (990), 178 states have call predecessors, (990), 175 states have return successors, (988), 970 states have call predecessors, (988), 988 states have call successors, (988) [2023-11-23 21:23:39,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4123 states to 4123 states and 6233 transitions. [2023-11-23 21:23:39,848 INFO L78 Accepts]: Start accepts. Automaton has 4123 states and 6233 transitions. Word has length 258 [2023-11-23 21:23:39,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:39,849 INFO L495 AbstractCegarLoop]: Abstraction has 4123 states and 6233 transitions. [2023-11-23 21:23:39,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2023-11-23 21:23:39,851 INFO L276 IsEmpty]: Start isEmpty. Operand 4123 states and 6233 transitions. [2023-11-23 21:23:39,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2023-11-23 21:23:39,870 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:39,870 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:39,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:23:39,871 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:23:39,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:39,872 INFO L85 PathProgramCache]: Analyzing trace with hash 545058727, now seen corresponding path program 1 times [2023-11-23 21:23:39,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:39,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070322025] [2023-11-23 21:23:39,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:39,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:40,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2023-11-23 21:23:40,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:40,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070322025] [2023-11-23 21:23:40,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070322025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:40,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:40,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:23:40,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959773196] [2023-11-23 21:23:40,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:40,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:23:40,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:40,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:23:40,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:23:40,470 INFO L87 Difference]: Start difference. First operand 4123 states and 6233 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-11-23 21:23:42,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []