./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-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh --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 fe8c4b1a27642c802f8c97577aadb7892fddcd015ae43c580aa1247dba190651 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:09:35,266 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:09:35,353 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 16:09:35,357 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:09:35,358 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:09:35,379 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:09:35,380 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:09:35,380 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:09:35,381 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:09:35,382 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:09:35,382 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:09:35,383 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:09:35,383 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:09:35,384 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:09:35,384 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:09:35,385 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:09:35,385 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:09:35,386 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:09:35,386 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:09:35,387 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:09:35,387 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:09:35,387 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:09:35,388 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:09:35,389 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:09:35,389 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:09:35,389 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:09:35,390 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:09:35,390 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:09:35,390 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:09:35,391 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:09:35,391 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:09:35,391 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:09:35,391 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:09:35,392 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:09:35,392 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:09:35,392 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:09:35,392 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:09:35,392 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:09:35,393 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:09:35,393 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:09:35,393 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:09:35,393 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:09:35,393 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:09:35,394 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:09:35,394 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_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe8c4b1a27642c802f8c97577aadb7892fddcd015ae43c580aa1247dba190651 [2023-12-02 16:09:35,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:09:35,634 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:09:35,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:09:35,638 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:09:35,638 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:09:35,639 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2023-12-02 16:09:38,363 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:09:38,718 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:09:38,719 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2023-12-02 16:09:38,748 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/data/7210e3f0d/d64e1c2ec1d341029531648ca31dfcad/FLAG15b69beaf [2023-12-02 16:09:38,761 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/data/7210e3f0d/d64e1c2ec1d341029531648ca31dfcad [2023-12-02 16:09:38,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:09:38,765 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:09:38,767 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:09:38,767 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:09:38,772 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:09:38,773 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:09:38" (1/1) ... [2023-12-02 16:09:38,774 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@492d2e17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:09:38, skipping insertion in model container [2023-12-02 16:09:38,774 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:09:38" (1/1) ... [2023-12-02 16:09:38,852 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:09:39,440 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_73d61234-dcc3-45b1-bf0f-51a3569cc256/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i[120162,120175] [2023-12-02 16:09:39,476 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:09:39,491 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:09:39,558 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"); [3119] [2023-12-02 16:09:39,560 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)); [3126] [2023-12-02 16:09:39,560 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"); [3134-3135] [2023-12-02 16:09:39,561 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"); [3143-3144] [2023-12-02 16:09:39,563 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("outb %b0, %w1": : "a" (value), "Nd" (port)); [3164] [2023-12-02 16:09:39,563 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("inb %w1, %b0": "=a" (value): "Nd" (port)); [3172] [2023-12-02 16:09:39,587 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __get_user_%P3": "=a" (__ret_gu), "=r" (__val_gu): "0" (buf + ofs), "i" (1UL)); [3673-3674] [2023-12-02 16:09:39,591 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_1": "=a" (__ret_pu): "0" (__pu_val), "c" (uarg.i): "ebx"); [3734] [2023-12-02 16:09:39,592 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_2": "=a" (__ret_pu): "0" (__pu_val), "c" (uarg.i): "ebx"); [3737] [2023-12-02 16:09:39,593 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_4": "=a" (__ret_pu): "0" (__pu_val), "c" (uarg.i): "ebx"); [3740] [2023-12-02 16:09:39,593 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_8": "=a" (__ret_pu): "0" (__pu_val), "c" (uarg.i): "ebx"); [3743] [2023-12-02 16:09:39,593 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_X": "=a" (__ret_pu): "0" (__pu_val), "c" (uarg.i): "ebx"); [3746] [2023-12-02 16:09:39,594 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_1": "=a" (__ret_pu___0): "0" (__pu_val___0), "c" (uarg.i): "ebx"); [3757-3758] [2023-12-02 16:09:39,595 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_2": "=a" (__ret_pu___0): "0" (__pu_val___0), "c" (uarg.i): "ebx"); [3761-3762] [2023-12-02 16:09:39,595 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_4": "=a" (__ret_pu___0): "0" (__pu_val___0), "c" (uarg.i): "ebx"); [3765-3766] [2023-12-02 16:09:39,596 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_8": "=a" (__ret_pu___0): "0" (__pu_val___0), "c" (uarg.i): "ebx"); [3769-3770] [2023-12-02 16:09:39,596 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_X": "=a" (__ret_pu___0): "0" (__pu_val___0), "c" (uarg.i): "ebx"); [3773-3774] [2023-12-02 16:09:39,597 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __get_user_%P3": "=a" (__ret_gu), "=r" (__val_gu): "0" (uarg.i), "i" (4UL)); [3785-3786] [2023-12-02 16:09:39,599 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __get_user_%P3": "=a" (__ret_gu___0), "=r" (__val_gu___0): "0" (uarg.i), "i" (4UL)); [3823-3824] [2023-12-02 16:09:39,601 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_1": "=a" (__ret_pu___1): "0" (__pu_val___1), "c" (uarg.i): "ebx"); [3837-3838] [2023-12-02 16:09:39,601 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_2": "=a" (__ret_pu___1): "0" (__pu_val___1), "c" (uarg.i): "ebx"); [3841-3842] [2023-12-02 16:09:39,601 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_4": "=a" (__ret_pu___1): "0" (__pu_val___1), "c" (uarg.i): "ebx"); [3845-3846] [2023-12-02 16:09:39,602 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_8": "=a" (__ret_pu___1): "0" (__pu_val___1), "c" (uarg.i): "ebx"); [3849-3850] [2023-12-02 16:09:39,602 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_X": "=a" (__ret_pu___1): "0" (__pu_val___1), "c" (uarg.i): "ebx"); [3853-3854] [2023-12-02 16:09:39,627 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_73d61234-dcc3-45b1-bf0f-51a3569cc256/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i[120162,120175] [2023-12-02 16:09:39,633 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:09:39,668 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:09:39,669 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:09:39 WrapperNode [2023-12-02 16:09:39,669 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:09:39,670 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:09:39,670 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:09:39,670 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:09:39,678 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:09:39" (1/1) ... [2023-12-02 16:09:39,710 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:09:39" (1/1) ... [2023-12-02 16:09:39,763 INFO L138 Inliner]: procedures = 95, calls = 384, calls flagged for inlining = 31, calls inlined = 28, statements flattened = 1247 [2023-12-02 16:09:39,764 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:09:39,765 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:09:39,765 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:09:39,765 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:09:39,772 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:09:39" (1/1) ... [2023-12-02 16:09:39,772 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:09:39" (1/1) ... [2023-12-02 16:09:39,785 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:09:39" (1/1) ... [2023-12-02 16:09:39,785 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:09:39" (1/1) ... [2023-12-02 16:09:39,821 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:09:39" (1/1) ... [2023-12-02 16:09:39,832 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:09:39" (1/1) ... [2023-12-02 16:09:39,841 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:09:39" (1/1) ... [2023-12-02 16:09:39,849 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:09:39" (1/1) ... [2023-12-02 16:09:39,864 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:09:39,865 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:09:39,865 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:09:39,865 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:09:39,866 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:09:39" (1/1) ... [2023-12-02 16:09:39,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:09:39,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:09:39,902 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:09:39,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:09:39,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:09:39,946 INFO L130 BoogieDeclarations]: Found specification of procedure superio_inw [2023-12-02 16:09:39,946 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_inw [2023-12-02 16:09:39,947 INFO L130 BoogieDeclarations]: Found specification of procedure superio_outw [2023-12-02 16:09:39,947 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_outw [2023-12-02 16:09:39,947 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_stop [2023-12-02 16:09:39,947 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_stop [2023-12-02 16:09:39,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-12-02 16:09:39,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 16:09:39,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 16:09:39,948 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_write [2023-12-02 16:09:39,948 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_write [2023-12-02 16:09:39,948 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_update_timeout [2023-12-02 16:09:39,948 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_update_timeout [2023-12-02 16:09:39,948 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-12-02 16:09:39,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-12-02 16:09:39,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 16:09:39,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-12-02 16:09:39,949 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-12-02 16:09:39,949 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 16:09:39,949 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_round_time [2023-12-02 16:09:39,949 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_round_time [2023-12-02 16:09:39,949 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_reboot_notifier [2023-12-02 16:09:39,949 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_reboot_notifier [2023-12-02 16:09:39,949 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2023-12-02 16:09:39,949 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2023-12-02 16:09:39,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 16:09:39,950 INFO L130 BoogieDeclarations]: Found specification of procedure superio_exit [2023-12-02 16:09:39,950 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_exit [2023-12-02 16:09:39,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 16:09:39,950 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2023-12-02 16:09:39,950 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2023-12-02 16:09:39,950 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-12-02 16:09:39,950 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-12-02 16:09:39,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 16:09:39,951 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2023-12-02 16:09:39,951 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2023-12-02 16:09:39,951 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-12-02 16:09:39,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-12-02 16:09:39,951 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_start [2023-12-02 16:09:39,951 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_start [2023-12-02 16:09:39,951 INFO L130 BoogieDeclarations]: Found specification of procedure superio_select [2023-12-02 16:09:39,952 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_select [2023-12-02 16:09:39,952 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2023-12-02 16:09:39,952 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2023-12-02 16:09:39,952 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2023-12-02 16:09:39,952 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2023-12-02 16:09:39,952 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2023-12-02 16:09:39,952 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2023-12-02 16:09:39,952 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2023-12-02 16:09:39,953 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2023-12-02 16:09:39,953 INFO L130 BoogieDeclarations]: Found specification of procedure superio_enter [2023-12-02 16:09:39,953 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_enter [2023-12-02 16:09:39,953 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-12-02 16:09:39,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-12-02 16:09:39,953 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 16:09:39,953 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 16:09:39,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 16:09:39,954 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_keepalive [2023-12-02 16:09:39,954 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_keepalive [2023-12-02 16:09:39,954 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2023-12-02 16:09:39,954 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2023-12-02 16:09:39,954 INFO L130 BoogieDeclarations]: Found specification of procedure superio_inb [2023-12-02 16:09:39,954 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_inb [2023-12-02 16:09:39,954 INFO L130 BoogieDeclarations]: Found specification of procedure superio_outb [2023-12-02 16:09:39,955 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_outb [2023-12-02 16:09:39,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 16:09:39,955 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2023-12-02 16:09:39,955 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2023-12-02 16:09:39,955 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2023-12-02 16:09:39,955 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2023-12-02 16:09:39,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:09:39,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:09:39,956 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-12-02 16:09:39,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-12-02 16:09:40,218 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:09:40,221 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:09:40,427 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-12-02 16:09:41,373 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:09:41,697 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:09:41,697 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 16:09:41,699 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:09:41 BoogieIcfgContainer [2023-12-02 16:09:41,699 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:09:41,701 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:09:41,701 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:09:41,704 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:09:41,705 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:09:38" (1/3) ... [2023-12-02 16:09:41,705 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c5d9e4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:09:41, skipping insertion in model container [2023-12-02 16:09:41,705 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:09:39" (2/3) ... [2023-12-02 16:09:41,706 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c5d9e4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:09:41, skipping insertion in model container [2023-12-02 16:09:41,706 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:09:41" (3/3) ... [2023-12-02 16:09:41,707 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2023-12-02 16:09:41,726 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:09:41,726 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 16:09:41,788 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:09:41,795 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;@2bd18259, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:09:41,795 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 16:09:41,803 INFO L276 IsEmpty]: Start isEmpty. Operand has 501 states, 278 states have (on average 1.39568345323741) internal successors, (388), 310 states have internal predecessors, (388), 191 states have call successors, (191), 31 states have call predecessors, (191), 30 states have return successors, (187), 182 states have call predecessors, (187), 187 states have call successors, (187) [2023-12-02 16:09:41,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-12-02 16:09:41,822 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:09:41,823 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:09:41,823 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:09:41,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:09:41,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1511693733, now seen corresponding path program 1 times [2023-12-02 16:09:41,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:09:41,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014777347] [2023-12-02 16:09:41,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:09:41,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:09:42,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:09:42,460 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-12-02 16:09:42,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:09:42,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014777347] [2023-12-02 16:09:42,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014777347] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:09:42,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:09:42,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:09:42,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124700698] [2023-12-02 16:09:42,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:09:42,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:09:42,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:09:42,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:09:42,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:09:42,502 INFO L87 Difference]: Start difference. First operand has 501 states, 278 states have (on average 1.39568345323741) internal successors, (388), 310 states have internal predecessors, (388), 191 states have call successors, (191), 31 states have call predecessors, (191), 30 states have return successors, (187), 182 states have call predecessors, (187), 187 states have call successors, (187) 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, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-12-02 16:09:42,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:09:42,947 INFO L93 Difference]: Finished difference Result 977 states and 1498 transitions. [2023-12-02 16:09:42,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:09:42,950 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, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 105 [2023-12-02 16:09:42,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:09:42,972 INFO L225 Difference]: With dead ends: 977 [2023-12-02 16:09:42,972 INFO L226 Difference]: Without dead ends: 925 [2023-12-02 16:09:42,977 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 [2023-12-02 16:09:42,981 INFO L413 NwaCegarLoop]: 803 mSDtfsCounter, 726 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 1488 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:09:42,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [726 Valid, 1488 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:09:43,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2023-12-02 16:09:43,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 924. [2023-12-02 16:09:43,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 521 states have (on average 1.381957773512476) internal successors, (720), 568 states have internal predecessors, (720), 345 states have call successors, (345), 58 states have call predecessors, (345), 57 states have return successors, (344), 335 states have call predecessors, (344), 344 states have call successors, (344) [2023-12-02 16:09:43,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1409 transitions. [2023-12-02 16:09:43,141 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1409 transitions. Word has length 105 [2023-12-02 16:09:43,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:09:43,142 INFO L495 AbstractCegarLoop]: Abstraction has 924 states and 1409 transitions. [2023-12-02 16:09:43,142 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, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-12-02 16:09:43,142 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1409 transitions. [2023-12-02 16:09:43,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-12-02 16:09:43,151 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:09:43,152 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:09:43,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 16:09:43,152 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:09:43,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:09:43,153 INFO L85 PathProgramCache]: Analyzing trace with hash 284057163, now seen corresponding path program 1 times [2023-12-02 16:09:43,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:09:43,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708793508] [2023-12-02 16:09:43,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:09:43,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:09:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:09:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-12-02 16:09:43,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:09:43,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708793508] [2023-12-02 16:09:43,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708793508] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:09:43,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:09:43,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:09:43,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945160580] [2023-12-02 16:09:43,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:09:43,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:09:43,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:09:43,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:09:43,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:09:43,407 INFO L87 Difference]: Start difference. First operand 924 states and 1409 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-12-02 16:09:44,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:09:44,031 INFO L93 Difference]: Finished difference Result 2254 states and 3421 transitions. [2023-12-02 16:09:44,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:09:44,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 147 [2023-12-02 16:09:44,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:09:44,044 INFO L225 Difference]: With dead ends: 2254 [2023-12-02 16:09:44,044 INFO L226 Difference]: Without dead ends: 1354 [2023-12-02 16:09:44,050 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 [2023-12-02 16:09:44,052 INFO L413 NwaCegarLoop]: 710 mSDtfsCounter, 388 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 1353 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:09:44,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 1353 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 16:09:44,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2023-12-02 16:09:44,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1348. [2023-12-02 16:09:44,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 747 states have (on average 1.3761713520749665) internal successors, (1028), 814 states have internal predecessors, (1028), 506 states have call successors, (506), 95 states have call predecessors, (506), 94 states have return successors, (505), 492 states have call predecessors, (505), 505 states have call successors, (505) [2023-12-02 16:09:44,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 2039 transitions. [2023-12-02 16:09:44,184 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 2039 transitions. Word has length 147 [2023-12-02 16:09:44,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:09:44,185 INFO L495 AbstractCegarLoop]: Abstraction has 1348 states and 2039 transitions. [2023-12-02 16:09:44,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-12-02 16:09:44,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 2039 transitions. [2023-12-02 16:09:44,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-12-02 16:09:44,193 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:09:44,194 INFO L195 NwaCegarLoop]: trace histogram [13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:09:44,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 16:09:44,194 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:09:44,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:09:44,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1408289954, now seen corresponding path program 1 times [2023-12-02 16:09:44,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:09:44,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194823563] [2023-12-02 16:09:44,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:09:44,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:09:44,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:09:44,998 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2023-12-02 16:09:44,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:09:44,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194823563] [2023-12-02 16:09:44,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194823563] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:09:44,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:09:44,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:09:45,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088687771] [2023-12-02 16:09:45,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:09:45,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:09:45,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:09:45,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:09:45,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:09:45,002 INFO L87 Difference]: Start difference. First operand 1348 states and 2039 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 4 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (44), 4 states have call predecessors, (44), 4 states have call successors, (44) [2023-12-02 16:09:46,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:09:46,894 INFO L93 Difference]: Finished difference Result 2988 states and 4592 transitions. [2023-12-02 16:09:46,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:09:46,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 4 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (44), 4 states have call predecessors, (44), 4 states have call successors, (44) Word has length 309 [2023-12-02 16:09:46,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:09:46,910 INFO L225 Difference]: With dead ends: 2988 [2023-12-02 16:09:46,910 INFO L226 Difference]: Without dead ends: 1672 [2023-12-02 16:09:46,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:09:46,918 INFO L413 NwaCegarLoop]: 793 mSDtfsCounter, 762 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 1103 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-02 16:09:46,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [810 Valid, 1103 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-02 16:09:46,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2023-12-02 16:09:47,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1622. [2023-12-02 16:09:47,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 885 states have (on average 1.3785310734463276) internal successors, (1220), 976 states have internal predecessors, (1220), 642 states have call successors, (642), 95 states have call predecessors, (642), 94 states have return successors, (641), 624 states have call predecessors, (641), 641 states have call successors, (641) [2023-12-02 16:09:47,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2503 transitions. [2023-12-02 16:09:47,061 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2503 transitions. Word has length 309 [2023-12-02 16:09:47,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:09:47,062 INFO L495 AbstractCegarLoop]: Abstraction has 1622 states and 2503 transitions. [2023-12-02 16:09:47,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 4 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (44), 4 states have call predecessors, (44), 4 states have call successors, (44) [2023-12-02 16:09:47,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2503 transitions. [2023-12-02 16:09:47,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2023-12-02 16:09:47,072 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:09:47,073 INFO L195 NwaCegarLoop]: trace histogram [13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:09:47,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 16:09:47,073 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:09:47,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:09:47,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1285903130, now seen corresponding path program 1 times [2023-12-02 16:09:47,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:09:47,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611923203] [2023-12-02 16:09:47,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:09:47,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:09:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:09:47,424 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2023-12-02 16:09:47,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:09:47,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611923203] [2023-12-02 16:09:47,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611923203] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:09:47,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:09:47,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:09:47,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068141383] [2023-12-02 16:09:47,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:09:47,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:09:47,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:09:47,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:09:47,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:09:47,427 INFO L87 Difference]: Start difference. First operand 1622 states and 2503 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2023-12-02 16:09:47,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:09:47,852 INFO L93 Difference]: Finished difference Result 3212 states and 4964 transitions. [2023-12-02 16:09:47,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:09:47,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) Word has length 312 [2023-12-02 16:09:47,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:09:47,866 INFO L225 Difference]: With dead ends: 3212 [2023-12-02 16:09:47,866 INFO L226 Difference]: Without dead ends: 1622 [2023-12-02 16:09:47,873 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 [2023-12-02 16:09:47,874 INFO L413 NwaCegarLoop]: 706 mSDtfsCounter, 704 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:09:47,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [704 Valid, 706 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:09:47,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2023-12-02 16:09:48,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1622. [2023-12-02 16:09:48,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 885 states have (on average 1.3694915254237288) internal successors, (1212), 976 states have internal predecessors, (1212), 642 states have call successors, (642), 95 states have call predecessors, (642), 94 states have return successors, (641), 624 states have call predecessors, (641), 641 states have call successors, (641) [2023-12-02 16:09:48,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2495 transitions. [2023-12-02 16:09:48,039 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2495 transitions. Word has length 312 [2023-12-02 16:09:48,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:09:48,040 INFO L495 AbstractCegarLoop]: Abstraction has 1622 states and 2495 transitions. [2023-12-02 16:09:48,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2023-12-02 16:09:48,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2495 transitions. [2023-12-02 16:09:48,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2023-12-02 16:09:48,050 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:09:48,050 INFO L195 NwaCegarLoop]: trace histogram [13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:09:48,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 16:09:48,050 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:09:48,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:09:48,051 INFO L85 PathProgramCache]: Analyzing trace with hash 720786918, now seen corresponding path program 1 times [2023-12-02 16:09:48,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:09:48,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799267289] [2023-12-02 16:09:48,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:09:48,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:09:48,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:09:48,542 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2023-12-02 16:09:48,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:09:48,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799267289] [2023-12-02 16:09:48,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799267289] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:09:48,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162116319] [2023-12-02 16:09:48,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:09:48,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:09:48,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:09:48,547 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:09:48,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 16:09:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:09:49,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 2173 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:09:49,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:09:49,612 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2023-12-02 16:09:49,612 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:09:49,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162116319] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:09:49,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:09:49,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-12-02 16:09:49,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29417046] [2023-12-02 16:09:49,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:09:49,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:09:49,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:09:49,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:09:49,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:09:49,616 INFO L87 Difference]: Start difference. First operand 1622 states and 2495 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2023-12-02 16:09:49,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:09:49,995 INFO L93 Difference]: Finished difference Result 3212 states and 4948 transitions. [2023-12-02 16:09:49,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:09:50,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) Word has length 317 [2023-12-02 16:09:50,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:09:50,014 INFO L225 Difference]: With dead ends: 3212 [2023-12-02 16:09:50,014 INFO L226 Difference]: Without dead ends: 1622 [2023-12-02 16:09:50,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:09:50,024 INFO L413 NwaCegarLoop]: 705 mSDtfsCounter, 587 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:09:50,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 705 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:09:50,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2023-12-02 16:09:50,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1622. [2023-12-02 16:09:50,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 885 states have (on average 1.3672316384180792) internal successors, (1210), 976 states have internal predecessors, (1210), 642 states have call successors, (642), 95 states have call predecessors, (642), 94 states have return successors, (641), 624 states have call predecessors, (641), 641 states have call successors, (641) [2023-12-02 16:09:50,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2493 transitions. [2023-12-02 16:09:50,206 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2493 transitions. Word has length 317 [2023-12-02 16:09:50,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:09:50,207 INFO L495 AbstractCegarLoop]: Abstraction has 1622 states and 2493 transitions. [2023-12-02 16:09:50,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2023-12-02 16:09:50,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2493 transitions. [2023-12-02 16:09:50,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2023-12-02 16:09:50,218 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:09:50,219 INFO L195 NwaCegarLoop]: trace histogram [13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:09:50,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 16:09:50,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:09:50,425 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:09:50,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:09:50,425 INFO L85 PathProgramCache]: Analyzing trace with hash 965158532, now seen corresponding path program 1 times [2023-12-02 16:09:50,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:09:50,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040011550] [2023-12-02 16:09:50,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:09:50,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:09:50,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:09:51,133 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2023-12-02 16:09:51,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:09:51,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040011550] [2023-12-02 16:09:51,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040011550] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:09:51,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:09:51,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:09:51,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412318539] [2023-12-02 16:09:51,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:09:51,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:09:51,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:09:51,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:09:51,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:09:51,136 INFO L87 Difference]: Start difference. First operand 1622 states and 2493 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (46), 3 states have call predecessors, (46), 3 states have call successors, (46) [2023-12-02 16:09:52,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:09:52,515 INFO L93 Difference]: Finished difference Result 4004 states and 6109 transitions. [2023-12-02 16:09:52,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:09:52,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (46), 3 states have call predecessors, (46), 3 states have call successors, (46) Word has length 322 [2023-12-02 16:09:52,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:09:52,534 INFO L225 Difference]: With dead ends: 4004 [2023-12-02 16:09:52,534 INFO L226 Difference]: Without dead ends: 2339 [2023-12-02 16:09:52,541 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 [2023-12-02 16:09:52,542 INFO L413 NwaCegarLoop]: 807 mSDtfsCounter, 634 mSDsluCounter, 1443 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 2250 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:09:52,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 2250 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 16:09:52,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2339 states. [2023-12-02 16:09:52,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2339 to 2284. [2023-12-02 16:09:52,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 1286 states have (on average 1.3685847589424571) internal successors, (1760), 1403 states have internal predecessors, (1760), 847 states have call successors, (847), 151 states have call predecessors, (847), 150 states have return successors, (846), 824 states have call predecessors, (846), 846 states have call successors, (846) [2023-12-02 16:09:52,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 3453 transitions. [2023-12-02 16:09:52,719 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 3453 transitions. Word has length 322 [2023-12-02 16:09:52,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:09:52,720 INFO L495 AbstractCegarLoop]: Abstraction has 2284 states and 3453 transitions. [2023-12-02 16:09:52,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (46), 3 states have call predecessors, (46), 3 states have call successors, (46) [2023-12-02 16:09:52,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 3453 transitions. [2023-12-02 16:09:52,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2023-12-02 16:09:52,730 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:09:52,730 INFO L195 NwaCegarLoop]: trace histogram [13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:09:52,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 16:09:52,730 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:09:52,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:09:52,731 INFO L85 PathProgramCache]: Analyzing trace with hash -871062325, now seen corresponding path program 1 times [2023-12-02 16:09:52,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:09:52,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355090150] [2023-12-02 16:09:52,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:09:52,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:09:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:09:53,149 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2023-12-02 16:09:53,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:09:53,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355090150] [2023-12-02 16:09:53,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355090150] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:09:53,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:09:53,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:09:53,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378569496] [2023-12-02 16:09:53,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:09:53,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:09:53,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:09:53,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:09:53,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:09:53,153 INFO L87 Difference]: Start difference. First operand 2284 states and 3453 transitions. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 3 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (48), 3 states have call predecessors, (48), 3 states have call successors, (48) [2023-12-02 16:09:54,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:09:54,422 INFO L93 Difference]: Finished difference Result 3361 states and 5042 transitions. [2023-12-02 16:09:54,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:09:54,423 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 3 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (48), 3 states have call predecessors, (48), 3 states have call successors, (48) Word has length 329 [2023-12-02 16:09:54,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:09:54,431 INFO L225 Difference]: With dead ends: 3361 [2023-12-02 16:09:54,431 INFO L226 Difference]: Without dead ends: 1010 [2023-12-02 16:09:54,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:09:54,440 INFO L413 NwaCegarLoop]: 704 mSDtfsCounter, 9 mSDsluCounter, 2070 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2774 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:09:54,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 2774 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 16:09:54,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2023-12-02 16:09:54,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 967. [2023-12-02 16:09:54,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 553 states have (on average 1.3363471971066907) internal successors, (739), 595 states have internal predecessors, (739), 328 states have call successors, (328), 86 states have call predecessors, (328), 85 states have return successors, (327), 318 states have call predecessors, (327), 327 states have call successors, (327) [2023-12-02 16:09:54,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 1394 transitions. [2023-12-02 16:09:54,530 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 1394 transitions. Word has length 329 [2023-12-02 16:09:54,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:09:54,531 INFO L495 AbstractCegarLoop]: Abstraction has 967 states and 1394 transitions. [2023-12-02 16:09:54,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 3 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (48), 3 states have call predecessors, (48), 3 states have call successors, (48) [2023-12-02 16:09:54,531 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 1394 transitions. [2023-12-02 16:09:54,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2023-12-02 16:09:54,540 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:09:54,540 INFO L195 NwaCegarLoop]: trace histogram [13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:09:54,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 16:09:54,541 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:09:54,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:09:54,541 INFO L85 PathProgramCache]: Analyzing trace with hash -590894484, now seen corresponding path program 1 times [2023-12-02 16:09:54,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:09:54,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647905242] [2023-12-02 16:09:54,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:09:54,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:09:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:09:55,124 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2023-12-02 16:09:55,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:09:55,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647905242] [2023-12-02 16:09:55,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647905242] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:09:55,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211191504] [2023-12-02 16:09:55,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:09:55,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:09:55,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:09:55,127 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:09:55,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 16:09:55,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:09:55,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 2237 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:09:55,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:09:55,863 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2023-12-02 16:09:55,863 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:09:55,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211191504] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:09:55,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:09:55,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2023-12-02 16:09:55,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813860714] [2023-12-02 16:09:55,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:09:55,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:09:55,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:09:55,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:09:55,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:09:55,867 INFO L87 Difference]: Start difference. First operand 967 states and 1394 transitions. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 2 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (52), 3 states have call predecessors, (52), 2 states have call successors, (52) [2023-12-02 16:09:56,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:09:56,961 INFO L93 Difference]: Finished difference Result 1872 states and 2708 transitions. [2023-12-02 16:09:56,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:09:56,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 2 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (52), 3 states have call predecessors, (52), 2 states have call successors, (52) Word has length 333 [2023-12-02 16:09:56,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:09:56,969 INFO L225 Difference]: With dead ends: 1872 [2023-12-02 16:09:56,969 INFO L226 Difference]: Without dead ends: 975 [2023-12-02 16:09:56,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:09:56,973 INFO L413 NwaCegarLoop]: 642 mSDtfsCounter, 0 mSDsluCounter, 1918 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2560 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:09:56,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2560 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 16:09:56,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2023-12-02 16:09:57,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 969. [2023-12-02 16:09:57,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 554 states have (on average 1.3357400722021662) internal successors, (740), 597 states have internal predecessors, (740), 328 states have call successors, (328), 86 states have call predecessors, (328), 86 states have return successors, (330), 318 states have call predecessors, (330), 327 states have call successors, (330) [2023-12-02 16:09:57,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1398 transitions. [2023-12-02 16:09:57,052 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1398 transitions. Word has length 333 [2023-12-02 16:09:57,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:09:57,052 INFO L495 AbstractCegarLoop]: Abstraction has 969 states and 1398 transitions. [2023-12-02 16:09:57,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 2 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (52), 3 states have call predecessors, (52), 2 states have call successors, (52) [2023-12-02 16:09:57,053 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1398 transitions. [2023-12-02 16:09:57,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2023-12-02 16:09:57,087 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:09:57,087 INFO L195 NwaCegarLoop]: trace histogram [17, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:09:57,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 16:09:57,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:09:57,288 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:09:57,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:09:57,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1358711364, now seen corresponding path program 1 times [2023-12-02 16:09:57,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:09:57,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324197598] [2023-12-02 16:09:57,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:09:57,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:09:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:09:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2023-12-02 16:09:57,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:09:57,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324197598] [2023-12-02 16:09:57,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324197598] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:09:57,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89244054] [2023-12-02 16:09:57,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:09:57,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:09:57,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:09:57,632 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:09:57,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 16:09:58,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:09:58,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 2280 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:09:58,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:09:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2023-12-02 16:09:58,325 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:09:58,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89244054] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:09:58,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:09:58,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2023-12-02 16:09:58,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437900524] [2023-12-02 16:09:58,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:09:58,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:09:58,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:09:58,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:09:58,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:09:58,328 INFO L87 Difference]: Start difference. First operand 969 states and 1398 transitions. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (60), 2 states have call predecessors, (60), 3 states have return successors, (59), 3 states have call predecessors, (59), 2 states have call successors, (59) [2023-12-02 16:09:59,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:09:59,293 INFO L93 Difference]: Finished difference Result 1837 states and 2657 transitions. [2023-12-02 16:09:59,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:09:59,294 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (60), 2 states have call predecessors, (60), 3 states have return successors, (59), 3 states have call predecessors, (59), 2 states have call successors, (59) Word has length 346 [2023-12-02 16:09:59,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:09:59,301 INFO L225 Difference]: With dead ends: 1837 [2023-12-02 16:09:59,301 INFO L226 Difference]: Without dead ends: 975 [2023-12-02 16:09:59,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:09:59,304 INFO L413 NwaCegarLoop]: 642 mSDtfsCounter, 0 mSDsluCounter, 1918 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2560 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 16:09:59,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2560 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 16:09:59,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2023-12-02 16:09:59,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 969. [2023-12-02 16:09:59,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 554 states have (on average 1.3357400722021662) internal successors, (740), 597 states have internal predecessors, (740), 328 states have call successors, (328), 86 states have call predecessors, (328), 86 states have return successors, (328), 318 states have call predecessors, (328), 327 states have call successors, (328) [2023-12-02 16:09:59,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1396 transitions. [2023-12-02 16:09:59,384 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1396 transitions. Word has length 346 [2023-12-02 16:09:59,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:09:59,385 INFO L495 AbstractCegarLoop]: Abstraction has 969 states and 1396 transitions. [2023-12-02 16:09:59,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (60), 2 states have call predecessors, (60), 3 states have return successors, (59), 3 states have call predecessors, (59), 2 states have call successors, (59) [2023-12-02 16:09:59,385 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1396 transitions. [2023-12-02 16:09:59,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2023-12-02 16:09:59,392 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:09:59,393 INFO L195 NwaCegarLoop]: trace histogram [21, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:09:59,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 16:09:59,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:09:59,594 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:09:59,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:09:59,594 INFO L85 PathProgramCache]: Analyzing trace with hash 846086612, now seen corresponding path program 2 times [2023-12-02 16:09:59,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:09:59,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12013195] [2023-12-02 16:09:59,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:09:59,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:09:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:10:00,096 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 711 trivial. 0 not checked. [2023-12-02 16:10:00,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:10:00,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12013195] [2023-12-02 16:10:00,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12013195] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:10:00,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015934137] [2023-12-02 16:10:00,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:10:00,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:10:00,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:10:00,098 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:10:00,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 16:10:01,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 16:10:01,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:10:01,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 1388 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 16:10:01,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:10:01,937 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2023-12-02 16:10:01,937 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:10:01,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015934137] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:10:01,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:10:01,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 8 [2023-12-02 16:10:01,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70782024] [2023-12-02 16:10:01,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:10:01,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:10:01,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:10:01,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:10:01,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:10:01,940 INFO L87 Difference]: Start difference. First operand 969 states and 1396 transitions. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 6 states have internal predecessors, (129), 2 states have call successors, (55), 2 states have call predecessors, (55), 4 states have return successors, (54), 4 states have call predecessors, (54), 2 states have call successors, (54) [2023-12-02 16:10:03,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:10:03,425 INFO L93 Difference]: Finished difference Result 1714 states and 2503 transitions. [2023-12-02 16:10:03,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 16:10:03,425 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 6 states have internal predecessors, (129), 2 states have call successors, (55), 2 states have call predecessors, (55), 4 states have return successors, (54), 4 states have call predecessors, (54), 2 states have call successors, (54) Word has length 359 [2023-12-02 16:10:03,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:10:03,433 INFO L225 Difference]: With dead ends: 1714 [2023-12-02 16:10:03,434 INFO L226 Difference]: Without dead ends: 997 [2023-12-02 16:10:03,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-12-02 16:10:03,437 INFO L413 NwaCegarLoop]: 638 mSDtfsCounter, 4 mSDsluCounter, 3820 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 4458 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:10:03,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 4458 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 16:10:03,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2023-12-02 16:10:03,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 985. [2023-12-02 16:10:03,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 566 states have (on average 1.3286219081272084) internal successors, (752), 609 states have internal predecessors, (752), 328 states have call successors, (328), 86 states have call predecessors, (328), 90 states have return successors, (343), 322 states have call predecessors, (343), 327 states have call successors, (343) [2023-12-02 16:10:03,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1423 transitions. [2023-12-02 16:10:03,518 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1423 transitions. Word has length 359 [2023-12-02 16:10:03,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:10:03,519 INFO L495 AbstractCegarLoop]: Abstraction has 985 states and 1423 transitions. [2023-12-02 16:10:03,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 6 states have internal predecessors, (129), 2 states have call successors, (55), 2 states have call predecessors, (55), 4 states have return successors, (54), 4 states have call predecessors, (54), 2 states have call successors, (54) [2023-12-02 16:10:03,520 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1423 transitions. [2023-12-02 16:10:03,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2023-12-02 16:10:03,526 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:10:03,526 INFO L195 NwaCegarLoop]: trace histogram [21, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:10:03,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 16:10:03,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 16:10:03,737 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:10:03,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:10:03,738 INFO L85 PathProgramCache]: Analyzing trace with hash -2019018433, now seen corresponding path program 1 times [2023-12-02 16:10:03,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:10:03,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616901546] [2023-12-02 16:10:03,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:10:03,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:10:03,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:10:04,843 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2023-12-02 16:10:04,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:10:04,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616901546] [2023-12-02 16:10:04,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616901546] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:10:04,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141171843] [2023-12-02 16:10:04,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:10:04,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:10:04,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:10:04,845 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:10:04,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 16:10:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:10:06,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 2361 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 16:10:06,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:10:06,250 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2023-12-02 16:10:06,250 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:10:06,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141171843] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:10:06,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:10:06,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-12-02 16:10:06,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465955160] [2023-12-02 16:10:06,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:10:06,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:10:06,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:10:06,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:10:06,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:10:06,253 INFO L87 Difference]: Start difference. First operand 985 states and 1423 transitions. Second operand has 4 states, 3 states have (on average 41.0) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (59), 2 states have call predecessors, (59), 3 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2023-12-02 16:10:07,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:10:07,062 INFO L93 Difference]: Finished difference Result 1954 states and 2831 transitions. [2023-12-02 16:10:07,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:10:07,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 41.0) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (59), 2 states have call predecessors, (59), 3 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) Word has length 368 [2023-12-02 16:10:07,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:10:07,070 INFO L225 Difference]: With dead ends: 1954 [2023-12-02 16:10:07,070 INFO L226 Difference]: Without dead ends: 986 [2023-12-02 16:10:07,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:10:07,074 INFO L413 NwaCegarLoop]: 642 mSDtfsCounter, 0 mSDsluCounter, 1270 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1912 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 16:10:07,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1912 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 16:10:07,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2023-12-02 16:10:07,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 986. [2023-12-02 16:10:07,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 567 states have (on average 1.3280423280423281) internal successors, (753), 610 states have internal predecessors, (753), 328 states have call successors, (328), 86 states have call predecessors, (328), 90 states have return successors, (343), 322 states have call predecessors, (343), 327 states have call successors, (343) [2023-12-02 16:10:07,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 1424 transitions. [2023-12-02 16:10:07,178 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 1424 transitions. Word has length 368 [2023-12-02 16:10:07,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:10:07,178 INFO L495 AbstractCegarLoop]: Abstraction has 986 states and 1424 transitions. [2023-12-02 16:10:07,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 41.0) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (59), 2 states have call predecessors, (59), 3 states have return successors, (58), 2 states have call predecessors, (58), 2 states have call successors, (58) [2023-12-02 16:10:07,179 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 1424 transitions. [2023-12-02 16:10:07,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2023-12-02 16:10:07,184 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:10:07,184 INFO L195 NwaCegarLoop]: trace histogram [21, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:10:07,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 16:10:07,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 16:10:07,386 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:10:07,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:10:07,386 INFO L85 PathProgramCache]: Analyzing trace with hash -539993491, now seen corresponding path program 1 times [2023-12-02 16:10:07,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:10:07,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896905529] [2023-12-02 16:10:07,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:10:07,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:10:07,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:10:08,518 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 751 trivial. 0 not checked. [2023-12-02 16:10:08,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:10:08,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896905529] [2023-12-02 16:10:08,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896905529] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:10:08,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367096205] [2023-12-02 16:10:08,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:10:08,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:10:08,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:10:08,520 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:10:08,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_73d61234-dcc3-45b1-bf0f-51a3569cc256/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 16:10:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:10:13,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 2451 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 16:10:13,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:10:13,603 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 110 proven. 1 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2023-12-02 16:10:13,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:10:13,966 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2023-12-02 16:10:13,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367096205] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:10:13,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [35642061] [2023-12-02 16:10:13,992 INFO L159 IcfgInterpreter]: Started Sifa with 191 locations of interest [2023-12-02 16:10:13,992 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:10:13,995 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:10:13,999 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:10:13,999 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:10:54,903 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_memset with input of size 104 for LOIs [2023-12-02 16:10:55,379 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_init_zalloc with input of size 674 for LOIs [2023-12-02 16:11:04,681 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 699 for LOIs [2023-12-02 16:11:05,814 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 90 for LOIs [2023-12-02 16:11:05,832 INFO L197 IcfgInterpreter]: Interpreting procedure superio_enter with input of size 117 for LOIs [2023-12-02 16:11:06,137 INFO L197 IcfgInterpreter]: Interpreting procedure __request_region with input of size 137 for LOIs [2023-12-02 16:11:06,257 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:13:48,037 WARN L293 SmtUtils]: Spent 2.65m on a formula simplification. DAG size of input: 673 DAG size of output: 661 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:16:00,002 WARN L293 SmtUtils]: Spent 1.69m on a formula simplification. DAG size of input: 666 DAG size of output: 658 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:17:37,587 WARN L293 SmtUtils]: Spent 1.54m on a formula simplification. DAG size of input: 670 DAG size of output: 662 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:21:55,019 WARN L293 SmtUtils]: Spent 4.19m on a formula simplification. DAG size of input: 705 DAG size of output: 695 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)