./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.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_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/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_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/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_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/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 4de76b02991c4f8780142b48e1370b1ba073d7148b74e77b2c83d6f21359d59e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 12:22:07,334 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:22:07,400 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 12:22:07,405 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:22:07,406 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:22:07,430 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:22:07,431 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:22:07,431 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:22:07,432 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:22:07,433 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:22:07,433 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:22:07,434 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:22:07,434 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:22:07,435 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 12:22:07,435 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:22:07,436 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:22:07,436 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 12:22:07,437 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 12:22:07,437 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:22:07,438 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 12:22:07,438 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 12:22:07,439 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 12:22:07,440 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:22:07,440 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 12:22:07,440 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:22:07,441 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:22:07,441 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 12:22:07,442 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:22:07,442 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 12:22:07,443 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 12:22:07,443 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:22:07,443 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:22:07,444 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:22:07,444 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:22:07,445 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:22:07,445 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:22:07,445 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:22:07,445 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 12:22:07,446 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 12:22:07,446 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 12:22:07,446 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:22:07,446 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 12:22:07,447 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:22:07,447 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:22:07,447 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_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4de76b02991c4f8780142b48e1370b1ba073d7148b74e77b2c83d6f21359d59e [2023-12-02 12:22:07,669 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:22:07,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:22:07,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:22:07,695 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:22:07,696 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:22:07,697 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i [2023-12-02 12:22:10,492 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:22:10,904 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:22:10,905 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i [2023-12-02 12:22:10,947 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/data/0bf76f2b2/e596d374f92844d29fc5608a6880470e/FLAG3bff6a70d [2023-12-02 12:22:10,962 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/data/0bf76f2b2/e596d374f92844d29fc5608a6880470e [2023-12-02 12:22:10,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:22:10,966 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:22:10,968 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:22:10,968 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:22:10,973 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:22:10,974 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:22:10" (1/1) ... [2023-12-02 12:22:10,975 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51c2023f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:10, skipping insertion in model container [2023-12-02 12:22:10,975 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:22:10" (1/1) ... [2023-12-02 12:22:11,086 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:22:12,142 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_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i[185536,185549] [2023-12-02 12:22:12,319 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:22:12,351 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:22:12,440 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"); [3542] [2023-12-02 12:22:12,442 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)); [3549] [2023-12-02 12:22:12,442 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"); [3557-3558] [2023-12-02 12:22:12,591 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_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i[185536,185549] [2023-12-02 12:22:12,610 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:22:12,681 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:22:12,682 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:12 WrapperNode [2023-12-02 12:22:12,682 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:22:12,683 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:22:12,683 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:22:12,683 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:22:12,690 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:12" (1/1) ... [2023-12-02 12:22:12,750 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:12" (1/1) ... [2023-12-02 12:22:12,843 INFO L138 Inliner]: procedures = 282, calls = 1543, calls flagged for inlining = 103, calls inlined = 86, statements flattened = 2852 [2023-12-02 12:22:12,844 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:22:12,845 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:22:12,845 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:22:12,845 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:22:12,855 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:12" (1/1) ... [2023-12-02 12:22:12,855 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:12" (1/1) ... [2023-12-02 12:22:12,896 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:12" (1/1) ... [2023-12-02 12:22:12,896 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:12" (1/1) ... [2023-12-02 12:22:12,985 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:12" (1/1) ... [2023-12-02 12:22:12,999 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:12" (1/1) ... [2023-12-02 12:22:13,016 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:12" (1/1) ... [2023-12-02 12:22:13,027 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:12" (1/1) ... [2023-12-02 12:22:13,049 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:22:13,050 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:22:13,050 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:22:13,050 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:22:13,051 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:12" (1/1) ... [2023-12-02 12:22:13,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:22:13,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:22:13,080 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:22:13,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:22:13,122 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2023-12-02 12:22:13,122 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2023-12-02 12:22:13,122 INFO L130 BoogieDeclarations]: Found specification of procedure usb_translate_errors [2023-12-02 12:22:13,123 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_translate_errors [2023-12-02 12:22:13,123 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-12-02 12:22:13,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-12-02 12:22:13,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-12-02 12:22:13,123 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-12-02 12:22:13,123 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_wdm_mutex [2023-12-02 12:22:13,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_wdm_mutex [2023-12-02 12:22:13,124 INFO L130 BoogieDeclarations]: Found specification of procedure recover_from_urb_loss [2023-12-02 12:22:13,124 INFO L138 BoogieDeclarations]: Found implementation of procedure recover_from_urb_loss [2023-12-02 12:22:13,124 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_control_urb [2023-12-02 12:22:13,124 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_control_urb [2023-12-02 12:22:13,125 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-12-02 12:22:13,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-12-02 12:22:13,125 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2023-12-02 12:22:13,125 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2023-12-02 12:22:13,125 INFO L130 BoogieDeclarations]: Found specification of procedure __might_sleep [2023-12-02 12:22:13,125 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_sleep [2023-12-02 12:22:13,125 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_get_interface [2023-12-02 12:22:13,125 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_get_interface [2023-12-02 12:22:13,126 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_create [2023-12-02 12:22:13,126 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_create [2023-12-02 12:22:13,126 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-12-02 12:22:13,126 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-12-02 12:22:13,126 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-12-02 12:22:13,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-12-02 12:22:13,127 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_poll [2023-12-02 12:22:13,127 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_poll [2023-12-02 12:22:13,127 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2023-12-02 12:22:13,127 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2023-12-02 12:22:13,127 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 12:22:13,127 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 12:22:13,127 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-12-02 12:22:13,127 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-12-02 12:22:13,128 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-12-02 12:22:13,128 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-12-02 12:22:13,128 INFO L130 BoogieDeclarations]: Found specification of procedure clear_wdm_read_flag [2023-12-02 12:22:13,128 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_wdm_read_flag [2023-12-02 12:22:13,128 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_cancel_work_sync_39 [2023-12-02 12:22:13,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_cancel_work_sync_39 [2023-12-02 12:22:13,128 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_write [2023-12-02 12:22:13,128 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_write [2023-12-02 12:22:13,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 12:22:13,128 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2023-12-02 12:22:13,129 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2023-12-02 12:22:13,129 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_ioctl [2023-12-02 12:22:13,129 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_ioctl [2023-12-02 12:22:13,129 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_disconnect [2023-12-02 12:22:13,129 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_disconnect [2023-12-02 12:22:13,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 12:22:13,129 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_rlock_of_wdm_device [2023-12-02 12:22:13,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_rlock_of_wdm_device [2023-12-02 12:22:13,129 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-12-02 12:22:13,129 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-12-02 12:22:13,130 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2023-12-02 12:22:13,130 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2023-12-02 12:22:13,130 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_rxwork [2023-12-02 12:22:13,130 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_rxwork [2023-12-02 12:22:13,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 12:22:13,130 INFO L130 BoogieDeclarations]: Found specification of procedure disable_work_1 [2023-12-02 12:22:13,131 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_work_1 [2023-12-02 12:22:13,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 12:22:13,131 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-12-02 12:22:13,131 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-12-02 12:22:13,131 INFO L130 BoogieDeclarations]: Found specification of procedure cancel_work_sync [2023-12-02 12:22:13,131 INFO L138 BoogieDeclarations]: Found implementation of procedure cancel_work_sync [2023-12-02 12:22:13,131 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2023-12-02 12:22:13,131 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2023-12-02 12:22:13,132 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2023-12-02 12:22:13,132 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2023-12-02 12:22:13,132 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2023-12-02 12:22:13,132 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2023-12-02 12:22:13,132 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2023-12-02 12:22:13,132 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2023-12-02 12:22:13,132 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-12-02 12:22:13,132 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-12-02 12:22:13,133 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2023-12-02 12:22:13,133 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2023-12-02 12:22:13,133 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_wdm_mutex [2023-12-02 12:22:13,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_wdm_mutex [2023-12-02 12:22:13,133 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_wlock_of_wdm_device [2023-12-02 12:22:13,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_wlock_of_wdm_device [2023-12-02 12:22:13,133 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2023-12-02 12:22:13,134 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2023-12-02 12:22:13,134 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2023-12-02 12:22:13,134 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2023-12-02 12:22:13,134 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2023-12-02 12:22:13,134 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2023-12-02 12:22:13,134 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_flush [2023-12-02 12:22:13,134 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_flush [2023-12-02 12:22:13,134 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_wlock_of_wdm_device [2023-12-02 12:22:13,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_wlock_of_wdm_device [2023-12-02 12:22:13,135 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2023-12-02 12:22:13,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2023-12-02 12:22:13,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-12-02 12:22:13,135 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface [2023-12-02 12:22:13,135 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface [2023-12-02 12:22:13,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 12:22:13,135 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-12-02 12:22:13,135 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-12-02 12:22:13,135 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2023-12-02 12:22:13,135 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2023-12-02 12:22:13,135 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2023-12-02 12:22:13,136 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2023-12-02 12:22:13,136 INFO L130 BoogieDeclarations]: Found specification of procedure kill_urbs [2023-12-02 12:22:13,136 INFO L138 BoogieDeclarations]: Found implementation of procedure kill_urbs [2023-12-02 12:22:13,136 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait_event [2023-12-02 12:22:13,136 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait_event [2023-12-02 12:22:13,136 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-12-02 12:22:13,136 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-12-02 12:22:13,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 12:22:13,137 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2023-12-02 12:22:13,137 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2023-12-02 12:22:13,137 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_dev_dbg [2023-12-02 12:22:13,137 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_dev_dbg [2023-12-02 12:22:13,137 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2023-12-02 12:22:13,137 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2023-12-02 12:22:13,138 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-12-02 12:22:13,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-12-02 12:22:13,138 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-12-02 12:22:13,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-12-02 12:22:13,138 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_resume [2023-12-02 12:22:13,138 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_resume [2023-12-02 12:22:13,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 12:22:13,138 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2023-12-02 12:22:13,138 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2023-12-02 12:22:13,138 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-12-02 12:22:13,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-12-02 12:22:13,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 12:22:13,139 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2023-12-02 12:22:13,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2023-12-02 12:22:13,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 12:22:13,139 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2023-12-02 12:22:13,139 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2023-12-02 12:22:13,140 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2023-12-02 12:22:13,140 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2023-12-02 12:22:13,140 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2023-12-02 12:22:13,140 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2023-12-02 12:22:13,140 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2023-12-02 12:22:13,140 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2023-12-02 12:22:13,140 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_rlock_of_wdm_device [2023-12-02 12:22:13,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_rlock_of_wdm_device [2023-12-02 12:22:13,141 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_work [2023-12-02 12:22:13,141 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_work [2023-12-02 12:22:13,141 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_find_device [2023-12-02 12:22:13,141 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_find_device [2023-12-02 12:22:13,141 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2023-12-02 12:22:13,141 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2023-12-02 12:22:13,141 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2023-12-02 12:22:13,142 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2023-12-02 12:22:13,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 12:22:13,142 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2023-12-02 12:22:13,142 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2023-12-02 12:22:13,142 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2023-12-02 12:22:13,142 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2023-12-02 12:22:13,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:22:13,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:22:13,585 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:22:13,589 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:22:14,011 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-12-02 12:22:16,369 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:22:17,097 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:22:17,097 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 12:22:17,099 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:22:17 BoogieIcfgContainer [2023-12-02 12:22:17,099 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:22:17,101 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:22:17,102 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:22:17,105 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:22:17,105 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:22:10" (1/3) ... [2023-12-02 12:22:17,106 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ebf4e68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:22:17, skipping insertion in model container [2023-12-02 12:22:17,106 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:22:12" (2/3) ... [2023-12-02 12:22:17,106 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ebf4e68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:22:17, skipping insertion in model container [2023-12-02 12:22:17,106 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:22:17" (3/3) ... [2023-12-02 12:22:17,108 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i [2023-12-02 12:22:17,127 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:22:17,127 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 12:22:17,198 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:22:17,205 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;@9304702, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:22:17,205 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 12:22:17,214 INFO L276 IsEmpty]: Start isEmpty. Operand has 915 states, 525 states have (on average 1.3142857142857143) internal successors, (690), 558 states have internal predecessors, (690), 316 states have call successors, (316), 73 states have call predecessors, (316), 72 states have return successors, (311), 310 states have call predecessors, (311), 311 states have call successors, (311) [2023-12-02 12:22:17,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-12-02 12:22:17,232 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:17,233 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:22:17,234 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:22:17,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:17,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1228507754, now seen corresponding path program 1 times [2023-12-02 12:22:17,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:17,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075617193] [2023-12-02 12:22:17,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:17,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:17,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:18,286 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2023-12-02 12:22:18,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:18,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075617193] [2023-12-02 12:22:18,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075617193] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:18,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:22:18,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:22:18,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414701747] [2023-12-02 12:22:18,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:18,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:22:18,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:18,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:22:18,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:22:18,330 INFO L87 Difference]: Start difference. First operand has 915 states, 525 states have (on average 1.3142857142857143) internal successors, (690), 558 states have internal predecessors, (690), 316 states have call successors, (316), 73 states have call predecessors, (316), 72 states have return successors, (311), 310 states have call predecessors, (311), 311 states have call successors, (311) Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2023-12-02 12:22:19,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:22:23,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:22:25,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:22:27,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:22:27,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:27,126 INFO L93 Difference]: Finished difference Result 2649 states and 3860 transitions. [2023-12-02 12:22:27,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:22:27,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 140 [2023-12-02 12:22:27,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:27,164 INFO L225 Difference]: With dead ends: 2649 [2023-12-02 12:22:27,164 INFO L226 Difference]: Without dead ends: 1756 [2023-12-02 12:22:27,176 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 12:22:27,179 INFO L413 NwaCegarLoop]: 1187 mSDtfsCounter, 1214 mSDsluCounter, 1174 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1214 SdHoareTripleChecker+Valid, 2361 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:27,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1214 Valid, 2361 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 244 Invalid, 3 Unknown, 0 Unchecked, 8.6s Time] [2023-12-02 12:22:27,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2023-12-02 12:22:27,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1746. [2023-12-02 12:22:27,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1015 states have (on average 1.3014778325123153) internal successors, (1321), 1054 states have internal predecessors, (1321), 589 states have call successors, (589), 142 states have call predecessors, (589), 141 states have return successors, (575), 573 states have call predecessors, (575), 575 states have call successors, (575) [2023-12-02 12:22:27,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 2485 transitions. [2023-12-02 12:22:27,404 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 2485 transitions. Word has length 140 [2023-12-02 12:22:27,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:27,406 INFO L495 AbstractCegarLoop]: Abstraction has 1746 states and 2485 transitions. [2023-12-02 12:22:27,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2023-12-02 12:22:27,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 2485 transitions. [2023-12-02 12:22:27,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-12-02 12:22:27,412 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:27,412 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:22:27,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 12:22:27,413 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:22:27,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:27,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1498381701, now seen corresponding path program 1 times [2023-12-02 12:22:27,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:27,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467146049] [2023-12-02 12:22:27,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:27,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2023-12-02 12:22:27,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:27,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467146049] [2023-12-02 12:22:27,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467146049] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:27,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:22:27,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:22:27,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151321585] [2023-12-02 12:22:27,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:27,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:22:27,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:27,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:22:27,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:22:27,920 INFO L87 Difference]: Start difference. First operand 1746 states and 2485 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 12:22:29,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:22:31,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:22:34,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:22:36,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:22:36,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:36,074 INFO L93 Difference]: Finished difference Result 4377 states and 6157 transitions. [2023-12-02 12:22:36,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:22:36,074 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 145 [2023-12-02 12:22:36,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:36,097 INFO L225 Difference]: With dead ends: 4377 [2023-12-02 12:22:36,098 INFO L226 Difference]: Without dead ends: 2667 [2023-12-02 12:22:36,106 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 12:22:36,107 INFO L413 NwaCegarLoop]: 1180 mSDtfsCounter, 681 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 2270 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:36,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 2270 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 269 Invalid, 3 Unknown, 0 Unchecked, 8.0s Time] [2023-12-02 12:22:36,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2023-12-02 12:22:36,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 2646. [2023-12-02 12:22:36,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2646 states, 1536 states have (on average 1.2936197916666667) internal successors, (1987), 1581 states have internal predecessors, (1987), 862 states have call successors, (862), 248 states have call predecessors, (862), 247 states have return successors, (848), 844 states have call predecessors, (848), 848 states have call successors, (848) [2023-12-02 12:22:36,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2646 states to 2646 states and 3697 transitions. [2023-12-02 12:22:36,298 INFO L78 Accepts]: Start accepts. Automaton has 2646 states and 3697 transitions. Word has length 145 [2023-12-02 12:22:36,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:36,299 INFO L495 AbstractCegarLoop]: Abstraction has 2646 states and 3697 transitions. [2023-12-02 12:22:36,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 12:22:36,300 INFO L276 IsEmpty]: Start isEmpty. Operand 2646 states and 3697 transitions. [2023-12-02 12:22:36,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-12-02 12:22:36,303 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:36,303 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:22:36,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 12:22:36,304 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:22:36,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:36,305 INFO L85 PathProgramCache]: Analyzing trace with hash 590006495, now seen corresponding path program 1 times [2023-12-02 12:22:36,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:36,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352416683] [2023-12-02 12:22:36,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:36,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:36,851 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-12-02 12:22:36,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:36,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352416683] [2023-12-02 12:22:36,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352416683] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:36,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:22:36,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:22:36,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860555063] [2023-12-02 12:22:36,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:36,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:22:36,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:36,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:22:36,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:22:36,854 INFO L87 Difference]: Start difference. First operand 2646 states and 3697 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 12:22:37,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:22:40,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:22:40,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:40,434 INFO L93 Difference]: Finished difference Result 2648 states and 3698 transitions. [2023-12-02 12:22:40,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:22:40,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 155 [2023-12-02 12:22:40,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:40,455 INFO L225 Difference]: With dead ends: 2648 [2023-12-02 12:22:40,455 INFO L226 Difference]: Without dead ends: 2645 [2023-12-02 12:22:40,457 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 12:22:40,458 INFO L413 NwaCegarLoop]: 1168 mSDtfsCounter, 1242 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1242 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:40,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1242 Valid, 1168 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2023-12-02 12:22:40,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2645 states. [2023-12-02 12:22:40,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2645 to 2645. [2023-12-02 12:22:40,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 1536 states have (on average 1.29296875) internal successors, (1986), 1580 states have internal predecessors, (1986), 861 states have call successors, (861), 248 states have call predecessors, (861), 247 states have return successors, (848), 844 states have call predecessors, (848), 848 states have call successors, (848) [2023-12-02 12:22:40,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 3695 transitions. [2023-12-02 12:22:40,647 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 3695 transitions. Word has length 155 [2023-12-02 12:22:40,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:40,648 INFO L495 AbstractCegarLoop]: Abstraction has 2645 states and 3695 transitions. [2023-12-02 12:22:40,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 12:22:40,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 3695 transitions. [2023-12-02 12:22:40,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-12-02 12:22:40,651 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:40,652 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:22:40,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 12:22:40,652 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:22:40,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:40,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1450982835, now seen corresponding path program 1 times [2023-12-02 12:22:40,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:40,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544076098] [2023-12-02 12:22:40,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:40,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:40,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:41,136 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2023-12-02 12:22:41,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:41,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544076098] [2023-12-02 12:22:41,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544076098] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:41,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:22:41,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:22:41,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434040222] [2023-12-02 12:22:41,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:41,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:22:41,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:41,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:22:41,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:22:41,140 INFO L87 Difference]: Start difference. First operand 2645 states and 3695 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 12:22:44,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:22:46,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:22:46,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:46,904 INFO L93 Difference]: Finished difference Result 6595 states and 9189 transitions. [2023-12-02 12:22:46,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:22:46,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 161 [2023-12-02 12:22:46,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:46,933 INFO L225 Difference]: With dead ends: 6595 [2023-12-02 12:22:46,933 INFO L226 Difference]: Without dead ends: 3994 [2023-12-02 12:22:46,945 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 12:22:46,946 INFO L413 NwaCegarLoop]: 1577 mSDtfsCounter, 874 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 2682 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:46,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [874 Valid, 2682 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 291 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2023-12-02 12:22:46,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3994 states. [2023-12-02 12:22:47,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3994 to 3971. [2023-12-02 12:22:47,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3971 states, 2341 states have (on average 1.2981631781290046) internal successors, (3039), 2413 states have internal predecessors, (3039), 1249 states have call successors, (1249), 381 states have call predecessors, (1249), 380 states have return successors, (1236), 1228 states have call predecessors, (1236), 1236 states have call successors, (1236) [2023-12-02 12:22:47,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3971 states to 3971 states and 5524 transitions. [2023-12-02 12:22:47,208 INFO L78 Accepts]: Start accepts. Automaton has 3971 states and 5524 transitions. Word has length 161 [2023-12-02 12:22:47,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:47,209 INFO L495 AbstractCegarLoop]: Abstraction has 3971 states and 5524 transitions. [2023-12-02 12:22:47,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 12:22:47,210 INFO L276 IsEmpty]: Start isEmpty. Operand 3971 states and 5524 transitions. [2023-12-02 12:22:47,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-12-02 12:22:47,211 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:47,212 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:22:47,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 12:22:47,212 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:22:47,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:47,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1109812402, now seen corresponding path program 1 times [2023-12-02 12:22:47,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:47,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310430490] [2023-12-02 12:22:47,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:47,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:47,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:47,579 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-12-02 12:22:47,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:47,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310430490] [2023-12-02 12:22:47,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310430490] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:47,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:22:47,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:22:47,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597628046] [2023-12-02 12:22:47,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:47,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:22:47,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:47,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:22:47,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:22:47,582 INFO L87 Difference]: Start difference. First operand 3971 states and 5524 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 12:22:49,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:22:52,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:22:52,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:52,113 INFO L93 Difference]: Finished difference Result 3973 states and 5525 transitions. [2023-12-02 12:22:52,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:22:52,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 156 [2023-12-02 12:22:52,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:52,134 INFO L225 Difference]: With dead ends: 3973 [2023-12-02 12:22:52,134 INFO L226 Difference]: Without dead ends: 3970 [2023-12-02 12:22:52,136 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 12:22:52,137 INFO L413 NwaCegarLoop]: 1166 mSDtfsCounter, 1239 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1239 SdHoareTripleChecker+Valid, 1166 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:52,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1239 Valid, 1166 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 117 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2023-12-02 12:22:52,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3970 states. [2023-12-02 12:22:52,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3970 to 3970. [2023-12-02 12:22:52,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3970 states, 2341 states have (on average 1.297736010252029) internal successors, (3038), 2412 states have internal predecessors, (3038), 1248 states have call successors, (1248), 381 states have call predecessors, (1248), 380 states have return successors, (1236), 1228 states have call predecessors, (1236), 1236 states have call successors, (1236) [2023-12-02 12:22:52,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3970 states to 3970 states and 5522 transitions. [2023-12-02 12:22:52,400 INFO L78 Accepts]: Start accepts. Automaton has 3970 states and 5522 transitions. Word has length 156 [2023-12-02 12:22:52,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:52,401 INFO L495 AbstractCegarLoop]: Abstraction has 3970 states and 5522 transitions. [2023-12-02 12:22:52,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 12:22:52,401 INFO L276 IsEmpty]: Start isEmpty. Operand 3970 states and 5522 transitions. [2023-12-02 12:22:52,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-12-02 12:22:52,403 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:52,404 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:22:52,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 12:22:52,404 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:22:52,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:52,405 INFO L85 PathProgramCache]: Analyzing trace with hash 43931202, now seen corresponding path program 1 times [2023-12-02 12:22:52,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:52,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739888703] [2023-12-02 12:22:52,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:52,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:52,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:52,882 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-12-02 12:22:52,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:52,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739888703] [2023-12-02 12:22:52,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739888703] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:52,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:22:52,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:22:52,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351241012] [2023-12-02 12:22:52,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:52,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:22:52,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:52,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:22:52,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:22:52,885 INFO L87 Difference]: Start difference. First operand 3970 states and 5522 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 12:22:55,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:22:56,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:22:56,019 INFO L93 Difference]: Finished difference Result 3972 states and 5523 transitions. [2023-12-02 12:22:56,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:22:56,020 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 157 [2023-12-02 12:22:56,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:22:56,039 INFO L225 Difference]: With dead ends: 3972 [2023-12-02 12:22:56,039 INFO L226 Difference]: Without dead ends: 3969 [2023-12-02 12:22:56,041 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 12:22:56,041 INFO L413 NwaCegarLoop]: 1164 mSDtfsCounter, 1236 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 1164 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:22:56,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1236 Valid, 1164 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2023-12-02 12:22:56,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3969 states. [2023-12-02 12:22:56,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3969 to 3969. [2023-12-02 12:22:56,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3969 states, 2341 states have (on average 1.2973088423750534) internal successors, (3037), 2411 states have internal predecessors, (3037), 1247 states have call successors, (1247), 381 states have call predecessors, (1247), 380 states have return successors, (1236), 1228 states have call predecessors, (1236), 1236 states have call successors, (1236) [2023-12-02 12:22:56,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3969 states to 3969 states and 5520 transitions. [2023-12-02 12:22:56,258 INFO L78 Accepts]: Start accepts. Automaton has 3969 states and 5520 transitions. Word has length 157 [2023-12-02 12:22:56,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:22:56,259 INFO L495 AbstractCegarLoop]: Abstraction has 3969 states and 5520 transitions. [2023-12-02 12:22:56,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 12:22:56,259 INFO L276 IsEmpty]: Start isEmpty. Operand 3969 states and 5520 transitions. [2023-12-02 12:22:56,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-12-02 12:22:56,260 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:22:56,261 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:22:56,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 12:22:56,261 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:22:56,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:22:56,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1361357237, now seen corresponding path program 1 times [2023-12-02 12:22:56,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:22:56,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318986505] [2023-12-02 12:22:56,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:22:56,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:22:56,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:22:56,602 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-12-02 12:22:56,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:22:56,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318986505] [2023-12-02 12:22:56,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318986505] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:22:56,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:22:56,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:22:56,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12351638] [2023-12-02 12:22:56,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:22:56,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:22:56,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:22:56,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:22:56,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:22:56,605 INFO L87 Difference]: Start difference. First operand 3969 states and 5520 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 12:22:57,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:23:00,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:23:02,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:23:04,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:23:04,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:23:04,864 INFO L93 Difference]: Finished difference Result 11208 states and 15506 transitions. [2023-12-02 12:23:04,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:23:04,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 158 [2023-12-02 12:23:04,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:23:04,912 INFO L225 Difference]: With dead ends: 11208 [2023-12-02 12:23:04,912 INFO L226 Difference]: Without dead ends: 7285 [2023-12-02 12:23:04,927 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 12:23:04,927 INFO L413 NwaCegarLoop]: 1270 mSDtfsCounter, 1042 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 7 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1042 SdHoareTripleChecker+Valid, 2332 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2023-12-02 12:23:04,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1042 Valid, 2332 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 247 Invalid, 3 Unknown, 0 Unchecked, 7.9s Time] [2023-12-02 12:23:04,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7285 states. [2023-12-02 12:23:05,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7285 to 7265. [2023-12-02 12:23:05,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7265 states, 4308 states have (on average 1.2950324976787373) internal successors, (5579), 4429 states have internal predecessors, (5579), 2222 states have call successors, (2222), 744 states have call predecessors, (2222), 734 states have return successors, (2210), 2175 states have call predecessors, (2210), 2210 states have call successors, (2210) [2023-12-02 12:23:05,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7265 states to 7265 states and 10011 transitions. [2023-12-02 12:23:05,491 INFO L78 Accepts]: Start accepts. Automaton has 7265 states and 10011 transitions. Word has length 158 [2023-12-02 12:23:05,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:23:05,491 INFO L495 AbstractCegarLoop]: Abstraction has 7265 states and 10011 transitions. [2023-12-02 12:23:05,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 12:23:05,492 INFO L276 IsEmpty]: Start isEmpty. Operand 7265 states and 10011 transitions. [2023-12-02 12:23:05,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-12-02 12:23:05,494 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:23:05,494 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:23:05,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 12:23:05,495 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:23:05,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:23:05,495 INFO L85 PathProgramCache]: Analyzing trace with hash -748103771, now seen corresponding path program 1 times [2023-12-02 12:23:05,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:23:05,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366460844] [2023-12-02 12:23:05,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:23:05,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:23:05,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:23:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-12-02 12:23:06,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:23:06,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366460844] [2023-12-02 12:23:06,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366460844] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:23:06,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:23:06,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:23:06,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942399630] [2023-12-02 12:23:06,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:23:06,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:23:06,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:23:06,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:23:06,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:23:06,137 INFO L87 Difference]: Start difference. First operand 7265 states and 10011 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 12:23:08,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:23:10,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:23:10,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:23:10,859 INFO L93 Difference]: Finished difference Result 7909 states and 10527 transitions. [2023-12-02 12:23:10,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:23:10,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 159 [2023-12-02 12:23:10,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:23:10,902 INFO L225 Difference]: With dead ends: 7909 [2023-12-02 12:23:10,902 INFO L226 Difference]: Without dead ends: 7905 [2023-12-02 12:23:10,906 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 12:23:10,907 INFO L413 NwaCegarLoop]: 1186 mSDtfsCounter, 1032 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1032 SdHoareTripleChecker+Valid, 1427 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:23:10,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1032 Valid, 1427 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 164 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2023-12-02 12:23:10,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7905 states. [2023-12-02 12:23:11,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7905 to 7899. [2023-12-02 12:23:11,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7899 states, 4652 states have (on average 1.2751504729148753) internal successors, (5932), 4767 states have internal predecessors, (5932), 2292 states have call successors, (2292), 968 states have call predecessors, (2292), 954 states have return successors, (2282), 2247 states have call predecessors, (2282), 2282 states have call successors, (2282) [2023-12-02 12:23:11,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7899 states to 7899 states and 10506 transitions. [2023-12-02 12:23:11,565 INFO L78 Accepts]: Start accepts. Automaton has 7899 states and 10506 transitions. Word has length 159 [2023-12-02 12:23:11,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:23:11,566 INFO L495 AbstractCegarLoop]: Abstraction has 7899 states and 10506 transitions. [2023-12-02 12:23:11,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 12:23:11,566 INFO L276 IsEmpty]: Start isEmpty. Operand 7899 states and 10506 transitions. [2023-12-02 12:23:11,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-12-02 12:23:11,569 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:23:11,569 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:23:11,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 12:23:11,569 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:23:11,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:23:11,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1716880712, now seen corresponding path program 1 times [2023-12-02 12:23:11,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:23:11,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366341772] [2023-12-02 12:23:11,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:23:11,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:23:11,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:23:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-12-02 12:23:11,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:23:11,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366341772] [2023-12-02 12:23:11,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366341772] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:23:11,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:23:11,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:23:11,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173488562] [2023-12-02 12:23:11,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:23:11,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:23:11,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:23:11,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:23:11,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:23:11,927 INFO L87 Difference]: Start difference. First operand 7899 states and 10506 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 12:23:16,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:23:18,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:23:20,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:23:20,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:23:20,299 INFO L93 Difference]: Finished difference Result 21726 states and 28981 transitions. [2023-12-02 12:23:20,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:23:20,300 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 160 [2023-12-02 12:23:20,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:23:20,341 INFO L225 Difference]: With dead ends: 21726 [2023-12-02 12:23:20,341 INFO L226 Difference]: Without dead ends: 13866 [2023-12-02 12:23:20,364 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 12:23:20,364 INFO L413 NwaCegarLoop]: 1193 mSDtfsCounter, 1081 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 6 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1081 SdHoareTripleChecker+Valid, 2185 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2023-12-02 12:23:20,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1081 Valid, 2185 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 237 Invalid, 3 Unknown, 0 Unchecked, 7.8s Time] [2023-12-02 12:23:20,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13866 states. [2023-12-02 12:23:21,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13866 to 13837. [2023-12-02 12:23:21,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13837 states, 8241 states have (on average 1.285766290498726) internal successors, (10596), 8446 states have internal predecessors, (10596), 3919 states have call successors, (3919), 1721 states have call predecessors, (3919), 1676 states have return successors, (3940), 3809 states have call predecessors, (3940), 3908 states have call successors, (3940) [2023-12-02 12:23:21,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13837 states to 13837 states and 18455 transitions. [2023-12-02 12:23:21,153 INFO L78 Accepts]: Start accepts. Automaton has 13837 states and 18455 transitions. Word has length 160 [2023-12-02 12:23:21,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:23:21,154 INFO L495 AbstractCegarLoop]: Abstraction has 13837 states and 18455 transitions. [2023-12-02 12:23:21,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-12-02 12:23:21,154 INFO L276 IsEmpty]: Start isEmpty. Operand 13837 states and 18455 transitions. [2023-12-02 12:23:21,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-12-02 12:23:21,162 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:23:21,163 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 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] [2023-12-02 12:23:21,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 12:23:21,163 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:23:21,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:23:21,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1997324011, now seen corresponding path program 1 times [2023-12-02 12:23:21,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:23:21,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801886260] [2023-12-02 12:23:21,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:23:21,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:23:21,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:23:21,802 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2023-12-02 12:23:21,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:23:21,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801886260] [2023-12-02 12:23:21,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801886260] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:23:21,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:23:21,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:23:21,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391603784] [2023-12-02 12:23:21,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:23:21,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:23:21,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:23:21,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:23:21,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:23:21,804 INFO L87 Difference]: Start difference. First operand 13837 states and 18455 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2023-12-02 12:23:23,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:23:24,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:23:28,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:23:30,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:23:32,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:23:32,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:23:32,439 INFO L93 Difference]: Finished difference Result 34578 states and 45980 transitions. [2023-12-02 12:23:32,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:23:32,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 205 [2023-12-02 12:23:32,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:23:32,509 INFO L225 Difference]: With dead ends: 34578 [2023-12-02 12:23:32,509 INFO L226 Difference]: Without dead ends: 20787 [2023-12-02 12:23:32,545 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 12:23:32,546 INFO L413 NwaCegarLoop]: 1692 mSDtfsCounter, 951 mSDsluCounter, 1051 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 20 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 2743 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2023-12-02 12:23:32,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [951 Valid, 2743 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 334 Invalid, 3 Unknown, 0 Unchecked, 9.7s Time] [2023-12-02 12:23:32,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20787 states. [2023-12-02 12:23:33,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20787 to 20753. [2023-12-02 12:23:33,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20753 states, 12455 states have (on average 1.2776395022079485) internal successors, (15913), 12760 states have internal predecessors, (15913), 5713 states have call successors, (5713), 2653 states have call predecessors, (5713), 2584 states have return successors, (5734), 5561 states have call predecessors, (5734), 5702 states have call successors, (5734) [2023-12-02 12:23:33,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20753 states to 20753 states and 27360 transitions. [2023-12-02 12:23:33,646 INFO L78 Accepts]: Start accepts. Automaton has 20753 states and 27360 transitions. Word has length 205 [2023-12-02 12:23:33,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:23:33,646 INFO L495 AbstractCegarLoop]: Abstraction has 20753 states and 27360 transitions. [2023-12-02 12:23:33,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2023-12-02 12:23:33,646 INFO L276 IsEmpty]: Start isEmpty. Operand 20753 states and 27360 transitions. [2023-12-02 12:23:33,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-12-02 12:23:33,650 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:23:33,650 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2023-12-02 12:23:33,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 12:23:33,651 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:23:33,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:23:33,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1760068244, now seen corresponding path program 1 times [2023-12-02 12:23:33,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:23:33,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749047514] [2023-12-02 12:23:33,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:23:33,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:23:33,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:23:34,000 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-12-02 12:23:34,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:23:34,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749047514] [2023-12-02 12:23:34,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749047514] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:23:34,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:23:34,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:23:34,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802941312] [2023-12-02 12:23:34,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:23:34,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:23:34,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:23:34,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:23:34,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:23:34,002 INFO L87 Difference]: Start difference. First operand 20753 states and 27360 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2023-12-02 12:23:35,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:23:39,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:23:41,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:23:41,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:23:41,795 INFO L93 Difference]: Finished difference Result 31362 states and 41335 transitions. [2023-12-02 12:23:41,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:23:41,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 201 [2023-12-02 12:23:41,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:23:41,830 INFO L225 Difference]: With dead ends: 31362 [2023-12-02 12:23:41,831 INFO L226 Difference]: Without dead ends: 10652 [2023-12-02 12:23:41,870 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 12:23:41,870 INFO L413 NwaCegarLoop]: 1171 mSDtfsCounter, 12 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2328 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:23:41,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 2328 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 237 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2023-12-02 12:23:41,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10652 states. [2023-12-02 12:23:42,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10652 to 10521. [2023-12-02 12:23:42,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10521 states, 6319 states have (on average 1.2810571292926096) internal successors, (8095), 6477 states have internal predecessors, (8095), 2892 states have call successors, (2892), 1345 states have call predecessors, (2892), 1309 states have return successors, (2897), 2810 states have call predecessors, (2897), 2881 states have call successors, (2897) [2023-12-02 12:23:42,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10521 states to 10521 states and 13884 transitions. [2023-12-02 12:23:42,517 INFO L78 Accepts]: Start accepts. Automaton has 10521 states and 13884 transitions. Word has length 201 [2023-12-02 12:23:42,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:23:42,518 INFO L495 AbstractCegarLoop]: Abstraction has 10521 states and 13884 transitions. [2023-12-02 12:23:42,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2023-12-02 12:23:42,518 INFO L276 IsEmpty]: Start isEmpty. Operand 10521 states and 13884 transitions. [2023-12-02 12:23:42,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2023-12-02 12:23:42,521 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:23:42,521 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 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] [2023-12-02 12:23:42,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 12:23:42,521 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:23:42,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:23:42,522 INFO L85 PathProgramCache]: Analyzing trace with hash 734040405, now seen corresponding path program 1 times [2023-12-02 12:23:42,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:23:42,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124738509] [2023-12-02 12:23:42,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:23:42,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:23:42,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:23:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2023-12-02 12:23:42,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:23:42,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124738509] [2023-12-02 12:23:42,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124738509] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:23:42,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:23:42,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:23:42,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135317600] [2023-12-02 12:23:42,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:23:42,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:23:42,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:23:42,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:23:42,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:23:42,929 INFO L87 Difference]: Start difference. First operand 10521 states and 13884 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-12-02 12:23:47,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:23:49,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:23:49,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:23:49,321 INFO L93 Difference]: Finished difference Result 10529 states and 13890 transitions. [2023-12-02 12:23:49,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:23:49,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 212 [2023-12-02 12:23:49,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:23:49,353 INFO L225 Difference]: With dead ends: 10529 [2023-12-02 12:23:49,353 INFO L226 Difference]: Without dead ends: 10526 [2023-12-02 12:23:49,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 12:23:49,358 INFO L413 NwaCegarLoop]: 1166 mSDtfsCounter, 266 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 2135 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:23:49,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 2135 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 252 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2023-12-02 12:23:49,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10526 states. [2023-12-02 12:23:49,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10526 to 10520. [2023-12-02 12:23:49,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10520 states, 6319 states have (on average 1.2789998417471118) internal successors, (8082), 6476 states have internal predecessors, (8082), 2891 states have call successors, (2891), 1345 states have call predecessors, (2891), 1309 states have return successors, (2897), 2810 states have call predecessors, (2897), 2881 states have call successors, (2897) [2023-12-02 12:23:50,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10520 states to 10520 states and 13870 transitions. [2023-12-02 12:23:50,019 INFO L78 Accepts]: Start accepts. Automaton has 10520 states and 13870 transitions. Word has length 212 [2023-12-02 12:23:50,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:23:50,019 INFO L495 AbstractCegarLoop]: Abstraction has 10520 states and 13870 transitions. [2023-12-02 12:23:50,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-12-02 12:23:50,019 INFO L276 IsEmpty]: Start isEmpty. Operand 10520 states and 13870 transitions. [2023-12-02 12:23:50,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2023-12-02 12:23:50,023 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:23:50,023 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 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] [2023-12-02 12:23:50,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 12:23:50,023 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:23:50,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:23:50,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1844095659, now seen corresponding path program 1 times [2023-12-02 12:23:50,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:23:50,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635465474] [2023-12-02 12:23:50,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:23:50,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:23:50,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:23:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2023-12-02 12:23:50,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:23:50,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635465474] [2023-12-02 12:23:50,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635465474] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:23:50,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:23:50,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:23:50,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340270514] [2023-12-02 12:23:50,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:23:50,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:23:50,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:23:50,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:23:50,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:23:50,570 INFO L87 Difference]: Start difference. First operand 10520 states and 13870 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-12-02 12:23:51,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:23:55,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:23:56,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:23:56,006 INFO L93 Difference]: Finished difference Result 24459 states and 32214 transitions. [2023-12-02 12:23:56,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:23:56,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 225 [2023-12-02 12:23:56,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:23:56,055 INFO L225 Difference]: With dead ends: 24459 [2023-12-02 12:23:56,055 INFO L226 Difference]: Without dead ends: 14074 [2023-12-02 12:23:56,072 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 12:23:56,072 INFO L413 NwaCegarLoop]: 1418 mSDtfsCounter, 975 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 2424 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-12-02 12:23:56,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [975 Valid, 2424 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 268 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2023-12-02 12:23:56,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14074 states. [2023-12-02 12:23:56,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14074 to 14048. [2023-12-02 12:23:56,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14048 states, 8561 states have (on average 1.2829108748977922) internal successors, (10983), 8784 states have internal predecessors, (10983), 3707 states have call successors, (3707), 1819 states have call predecessors, (3707), 1779 states have return successors, (3721), 3610 states have call predecessors, (3721), 3697 states have call successors, (3721) [2023-12-02 12:23:56,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14048 states to 14048 states and 18411 transitions. [2023-12-02 12:23:56,743 INFO L78 Accepts]: Start accepts. Automaton has 14048 states and 18411 transitions. Word has length 225 [2023-12-02 12:23:56,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:23:56,744 INFO L495 AbstractCegarLoop]: Abstraction has 14048 states and 18411 transitions. [2023-12-02 12:23:56,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2023-12-02 12:23:56,744 INFO L276 IsEmpty]: Start isEmpty. Operand 14048 states and 18411 transitions. [2023-12-02 12:23:56,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2023-12-02 12:23:56,750 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:23:56,750 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 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] [2023-12-02 12:23:56,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 12:23:56,751 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:23:56,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:23:56,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1527555453, now seen corresponding path program 1 times [2023-12-02 12:23:56,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:23:56,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845455544] [2023-12-02 12:23:56,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:23:56,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:23:57,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:23:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2023-12-02 12:23:57,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:23:57,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845455544] [2023-12-02 12:23:57,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845455544] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:23:57,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:23:57,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:23:57,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698812863] [2023-12-02 12:23:57,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:23:57,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:23:57,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:23:57,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:23:57,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:23:57,820 INFO L87 Difference]: Start difference. First operand 14048 states and 18411 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 3 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-12-02 12:23:59,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:24:01,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:24:05,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:24:07,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:24:09,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:24:11,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:24:11,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:24:11,655 INFO L93 Difference]: Finished difference Result 33918 states and 44509 transitions. [2023-12-02 12:24:11,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:24:11,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 3 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 233 [2023-12-02 12:24:11,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:24:11,705 INFO L225 Difference]: With dead ends: 33918 [2023-12-02 12:24:11,705 INFO L226 Difference]: Without dead ends: 20005 [2023-12-02 12:24:11,731 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 12:24:11,732 INFO L413 NwaCegarLoop]: 1954 mSDtfsCounter, 1690 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 496 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1691 SdHoareTripleChecker+Valid, 2968 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2023-12-02 12:24:11,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1691 Valid, 2968 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 338 Invalid, 4 Unknown, 0 Unchecked, 12.8s Time] [2023-12-02 12:24:11,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20005 states. [2023-12-02 12:24:12,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20005 to 19892. [2023-12-02 12:24:12,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19892 states, 12165 states have (on average 1.2868886148787506) internal successors, (15655), 12508 states have internal predecessors, (15655), 5194 states have call successors, (5194), 2579 states have call predecessors, (5194), 2532 states have return successors, (5204), 5036 states have call predecessors, (5204), 5168 states have call successors, (5204) [2023-12-02 12:24:12,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19892 states to 19892 states and 26053 transitions. [2023-12-02 12:24:12,768 INFO L78 Accepts]: Start accepts. Automaton has 19892 states and 26053 transitions. Word has length 233 [2023-12-02 12:24:12,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:24:12,768 INFO L495 AbstractCegarLoop]: Abstraction has 19892 states and 26053 transitions. [2023-12-02 12:24:12,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 3 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-12-02 12:24:12,769 INFO L276 IsEmpty]: Start isEmpty. Operand 19892 states and 26053 transitions. [2023-12-02 12:24:12,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2023-12-02 12:24:12,773 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:24:12,773 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 3, 3, 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] [2023-12-02 12:24:12,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 12:24:12,774 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:24:12,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:24:12,774 INFO L85 PathProgramCache]: Analyzing trace with hash -659826169, now seen corresponding path program 1 times [2023-12-02 12:24:12,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:24:12,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307059984] [2023-12-02 12:24:12,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:24:12,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:24:13,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:24:13,991 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2023-12-02 12:24:13,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:24:13,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307059984] [2023-12-02 12:24:13,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307059984] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:24:13,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657829760] [2023-12-02 12:24:13,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:24:13,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:24:13,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:24:13,998 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:24:14,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 12:24:15,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:24:15,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 3178 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 12:24:15,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:24:15,572 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 216 proven. 0 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2023-12-02 12:24:15,572 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:24:15,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657829760] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:24:15,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:24:15,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-12-02 12:24:15,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672378983] [2023-12-02 12:24:15,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:24:15,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:24:15,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:24:15,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:24:15,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:24:15,575 INFO L87 Difference]: Start difference. First operand 19892 states and 26053 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2023-12-02 12:24:18,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:24:24,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:24:26,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:24:28,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:24:30,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:24:32,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:24:34,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:24:35,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:24:35,068 INFO L93 Difference]: Finished difference Result 42528 states and 55720 transitions. [2023-12-02 12:24:35,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:24:35,069 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 235 [2023-12-02 12:24:35,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:24:35,121 INFO L225 Difference]: With dead ends: 42528 [2023-12-02 12:24:35,121 INFO L226 Difference]: Without dead ends: 22771 [2023-12-02 12:24:35,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:24:35,159 INFO L413 NwaCegarLoop]: 1345 mSDtfsCounter, 1654 mSDsluCounter, 2079 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 20 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1659 SdHoareTripleChecker+Valid, 3424 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:24:35,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1659 Valid, 3424 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1282 Invalid, 7 Unknown, 0 Unchecked, 18.1s Time] [2023-12-02 12:24:35,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22771 states. [2023-12-02 12:24:36,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22771 to 22438. [2023-12-02 12:24:36,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22438 states, 13823 states have (on average 1.2908919916081893) internal successors, (17844), 14224 states have internal predecessors, (17844), 5762 states have call successors, (5762), 2899 states have call predecessors, (5762), 2852 states have return successors, (5788), 5588 states have call predecessors, (5788), 5736 states have call successors, (5788) [2023-12-02 12:24:36,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22438 states to 22438 states and 29394 transitions. [2023-12-02 12:24:36,238 INFO L78 Accepts]: Start accepts. Automaton has 22438 states and 29394 transitions. Word has length 235 [2023-12-02 12:24:36,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:24:36,238 INFO L495 AbstractCegarLoop]: Abstraction has 22438 states and 29394 transitions. [2023-12-02 12:24:36,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2023-12-02 12:24:36,239 INFO L276 IsEmpty]: Start isEmpty. Operand 22438 states and 29394 transitions. [2023-12-02 12:24:36,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2023-12-02 12:24:36,244 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:24:36,245 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:24:36,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 12:24:36,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:24:36,445 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:24:36,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:24:36,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1554153882, now seen corresponding path program 1 times [2023-12-02 12:24:36,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:24:36,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544493152] [2023-12-02 12:24:36,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:24:36,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:24:36,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:24:38,060 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2023-12-02 12:24:38,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:24:38,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544493152] [2023-12-02 12:24:38,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544493152] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:24:38,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:24:38,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 12:24:38,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884344269] [2023-12-02 12:24:38,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:24:38,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 12:24:38,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:24:38,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 12:24:38,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:24:38,063 INFO L87 Difference]: Start difference. First operand 22438 states and 29394 transitions. Second operand has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 2 states have call successors, (31) [2023-12-02 12:24:39,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:24:41,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:24:42,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:24:44,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:24:51,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:24:53,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:24:55,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:24:57,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:24:59,363 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:25:01,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:25:01,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:25:01,414 INFO L93 Difference]: Finished difference Result 45161 states and 59291 transitions. [2023-12-02 12:25:01,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:25:01,414 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 2 states have call successors, (31) Word has length 245 [2023-12-02 12:25:01,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:25:01,471 INFO L225 Difference]: With dead ends: 45161 [2023-12-02 12:25:01,471 INFO L226 Difference]: Without dead ends: 22858 [2023-12-02 12:25:01,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:25:01,508 INFO L413 NwaCegarLoop]: 1163 mSDtfsCounter, 3 mSDsluCounter, 5809 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 0 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6972 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:25:01,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6972 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 717 Invalid, 7 Unknown, 0 Unchecked, 22.3s Time] [2023-12-02 12:25:01,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22858 states. [2023-12-02 12:25:02,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22858 to 22738. [2023-12-02 12:25:02,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22738 states, 14023 states have (on average 1.2867432075875347) internal successors, (18044), 14436 states have internal predecessors, (18044), 5762 states have call successors, (5762), 2899 states have call predecessors, (5762), 2952 states have return successors, (5972), 5676 states have call predecessors, (5972), 5736 states have call successors, (5972) [2023-12-02 12:25:02,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22738 states to 22738 states and 29778 transitions. [2023-12-02 12:25:02,537 INFO L78 Accepts]: Start accepts. Automaton has 22738 states and 29778 transitions. Word has length 245 [2023-12-02 12:25:02,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:25:02,537 INFO L495 AbstractCegarLoop]: Abstraction has 22738 states and 29778 transitions. [2023-12-02 12:25:02,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 2 states have call successors, (32), 2 states have call predecessors, (32), 4 states have return successors, (31), 4 states have call predecessors, (31), 2 states have call successors, (31) [2023-12-02 12:25:02,537 INFO L276 IsEmpty]: Start isEmpty. Operand 22738 states and 29778 transitions. [2023-12-02 12:25:02,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-12-02 12:25:02,543 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:25:02,543 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:25:02,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-02 12:25:02,543 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:25:02,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:25:02,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1470072964, now seen corresponding path program 1 times [2023-12-02 12:25:02,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:25:02,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301212493] [2023-12-02 12:25:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:25:02,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:25:02,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:25:03,473 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 573 trivial. 0 not checked. [2023-12-02 12:25:03,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:25:03,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301212493] [2023-12-02 12:25:03,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301212493] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:25:03,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260827859] [2023-12-02 12:25:03,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:25:03,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:25:03,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:25:03,475 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:25:03,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 12:25:04,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:25:04,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 3222 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 12:25:04,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:25:04,563 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2023-12-02 12:25:04,563 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:25:04,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260827859] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:25:04,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:25:04,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-12-02 12:25:04,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030883988] [2023-12-02 12:25:04,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:25:04,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:25:04,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:25:04,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:25:04,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:25:04,566 INFO L87 Difference]: Start difference. First operand 22738 states and 29778 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2023-12-02 12:25:05,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:25:07,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:25:11,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:25:13,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:25:15,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:25:17,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:25:19,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:25:20,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:25:20,060 INFO L93 Difference]: Finished difference Result 45385 states and 59435 transitions. [2023-12-02 12:25:20,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:25:20,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 249 [2023-12-02 12:25:20,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:25:20,110 INFO L225 Difference]: With dead ends: 45385 [2023-12-02 12:25:20,111 INFO L226 Difference]: Without dead ends: 22774 [2023-12-02 12:25:20,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:25:20,146 INFO L413 NwaCegarLoop]: 1215 mSDtfsCounter, 1109 mSDsluCounter, 1651 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 6 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 2866 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:25:20,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1111 Valid, 2866 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 921 Invalid, 5 Unknown, 0 Unchecked, 14.4s Time] [2023-12-02 12:25:20,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22774 states. [2023-12-02 12:25:21,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22774 to 22401. [2023-12-02 12:25:21,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22401 states, 13833 states have (on average 1.287067158244777) internal successors, (17804), 14255 states have internal predecessors, (17804), 5669 states have call successors, (5669), 2818 states have call predecessors, (5669), 2898 states have return successors, (5879), 5601 states have call predecessors, (5879), 5643 states have call successors, (5879) [2023-12-02 12:25:21,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22401 states to 22401 states and 29352 transitions. [2023-12-02 12:25:21,193 INFO L78 Accepts]: Start accepts. Automaton has 22401 states and 29352 transitions. Word has length 249 [2023-12-02 12:25:21,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:25:21,194 INFO L495 AbstractCegarLoop]: Abstraction has 22401 states and 29352 transitions. [2023-12-02 12:25:21,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 3 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2023-12-02 12:25:21,194 INFO L276 IsEmpty]: Start isEmpty. Operand 22401 states and 29352 transitions. [2023-12-02 12:25:21,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2023-12-02 12:25:21,199 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:25:21,200 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 3, 3, 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] [2023-12-02 12:25:21,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 12:25:21,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:25:21,400 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:25:21,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:25:21,401 INFO L85 PathProgramCache]: Analyzing trace with hash 863966813, now seen corresponding path program 1 times [2023-12-02 12:25:21,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:25:21,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960542266] [2023-12-02 12:25:21,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:25:21,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:25:21,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:25:22,322 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2023-12-02 12:25:22,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:25:22,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960542266] [2023-12-02 12:25:22,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960542266] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:25:22,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850309857] [2023-12-02 12:25:22,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:25:22,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:25:22,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:25:22,324 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:25:22,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 12:25:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:25:23,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 3201 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 12:25:23,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:25:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 166 proven. 1 refuted. 0 times theorem prover too weak. 404 trivial. 0 not checked. [2023-12-02 12:25:23,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:25:23,794 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 563 trivial. 0 not checked. [2023-12-02 12:25:23,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850309857] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 12:25:23,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:25:23,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 5] total 13 [2023-12-02 12:25:23,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560024330] [2023-12-02 12:25:23,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:25:23,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:25:23,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:25:23,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:25:23,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-12-02 12:25:23,795 INFO L87 Difference]: Start difference. First operand 22401 states and 29352 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2023-12-02 12:25:30,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:25:32,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:25:34,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:25:36,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:25:38,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:25:40,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:25:42,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:25:43,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:25:43,012 INFO L93 Difference]: Finished difference Result 48793 states and 64166 transitions. [2023-12-02 12:25:43,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:25:43,012 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 246 [2023-12-02 12:25:43,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:25:43,073 INFO L225 Difference]: With dead ends: 48793 [2023-12-02 12:25:43,073 INFO L226 Difference]: Without dead ends: 26527 [2023-12-02 12:25:43,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-12-02 12:25:43,104 INFO L413 NwaCegarLoop]: 1245 mSDtfsCounter, 2290 mSDsluCounter, 1789 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 1011 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2387 SdHoareTripleChecker+Valid, 3034 SdHoareTripleChecker+Invalid, 2293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1011 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.7s IncrementalHoareTripleChecker+Time [2023-12-02 12:25:43,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2387 Valid, 3034 Invalid, 2293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1011 Valid, 1275 Invalid, 7 Unknown, 0 Unchecked, 17.7s Time] [2023-12-02 12:25:43,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26527 states. [2023-12-02 12:25:44,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26527 to 26353. [2023-12-02 12:25:44,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26353 states, 16471 states have (on average 1.2994353712585758) internal successors, (21403), 16930 states have internal predecessors, (21403), 6510 states have call successors, (6510), 3304 states have call predecessors, (6510), 3371 states have return successors, (6698), 6403 states have call predecessors, (6698), 6480 states have call successors, (6698) [2023-12-02 12:25:44,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26353 states to 26353 states and 34611 transitions. [2023-12-02 12:25:44,539 INFO L78 Accepts]: Start accepts. Automaton has 26353 states and 34611 transitions. Word has length 246 [2023-12-02 12:25:44,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:25:44,539 INFO L495 AbstractCegarLoop]: Abstraction has 26353 states and 34611 transitions. [2023-12-02 12:25:44,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2023-12-02 12:25:44,539 INFO L276 IsEmpty]: Start isEmpty. Operand 26353 states and 34611 transitions. [2023-12-02 12:25:44,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2023-12-02 12:25:44,545 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:25:44,546 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 3, 3, 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] [2023-12-02 12:25:44,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 12:25:44,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 12:25:44,746 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:25:44,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:25:44,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1889807290, now seen corresponding path program 1 times [2023-12-02 12:25:44,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:25:44,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763368696] [2023-12-02 12:25:44,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:25:44,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:25:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:25:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2023-12-02 12:25:45,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:25:45,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763368696] [2023-12-02 12:25:45,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763368696] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:25:45,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413424690] [2023-12-02 12:25:45,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:25:45,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:25:45,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:25:45,635 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:25:45,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 12:25:46,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:25:46,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 3393 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 12:25:46,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:25:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 216 proven. 0 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2023-12-02 12:25:47,111 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:25:47,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413424690] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:25:47,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:25:47,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2023-12-02 12:25:47,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84962725] [2023-12-02 12:25:47,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:25:47,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 12:25:47,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:25:47,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 12:25:47,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-12-02 12:25:47,114 INFO L87 Difference]: Start difference. First operand 26353 states and 34611 transitions. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 6 states have internal predecessors, (92), 4 states have call successors, (35), 3 states have call predecessors, (35), 4 states have return successors, (33), 5 states have call predecessors, (33), 4 states have call successors, (33) [2023-12-02 12:25:50,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:25:52,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:25:54,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:26:00,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:26:02,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:26:04,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:26:06,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:26:08,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:26:10,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:26:12,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:26:14,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:26:16,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:26:18,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:26:20,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:26:21,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:26:21,363 INFO L93 Difference]: Finished difference Result 55069 states and 72282 transitions. [2023-12-02 12:26:21,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:26:21,364 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 6 states have internal predecessors, (92), 4 states have call successors, (35), 3 states have call predecessors, (35), 4 states have return successors, (33), 5 states have call predecessors, (33), 4 states have call successors, (33) Word has length 254 [2023-12-02 12:26:21,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:26:21,427 INFO L225 Difference]: With dead ends: 55069 [2023-12-02 12:26:21,427 INFO L226 Difference]: Without dead ends: 28851 [2023-12-02 12:26:21,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-12-02 12:26:21,469 INFO L413 NwaCegarLoop]: 1627 mSDtfsCounter, 1666 mSDsluCounter, 3369 mSDsCounter, 0 mSdLazyCounter, 2586 mSolverCounterSat, 48 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1698 SdHoareTripleChecker+Valid, 4996 SdHoareTripleChecker+Invalid, 2647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2586 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.7s IncrementalHoareTripleChecker+Time [2023-12-02 12:26:21,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1698 Valid, 4996 Invalid, 2647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2586 Invalid, 13 Unknown, 0 Unchecked, 32.7s Time] [2023-12-02 12:26:21,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28851 states. [2023-12-02 12:26:22,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28851 to 26425. [2023-12-02 12:26:22,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26425 states, 16503 states have (on average 1.2988547536811488) internal successors, (21435), 16962 states have internal predecessors, (21435), 6542 states have call successors, (6542), 3304 states have call predecessors, (6542), 3379 states have return successors, (6738), 6443 states have call predecessors, (6738), 6512 states have call successors, (6738) [2023-12-02 12:26:22,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26425 states to 26425 states and 34715 transitions. [2023-12-02 12:26:22,843 INFO L78 Accepts]: Start accepts. Automaton has 26425 states and 34715 transitions. Word has length 254 [2023-12-02 12:26:22,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:26:22,843 INFO L495 AbstractCegarLoop]: Abstraction has 26425 states and 34715 transitions. [2023-12-02 12:26:22,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 6 states have internal predecessors, (92), 4 states have call successors, (35), 3 states have call predecessors, (35), 4 states have return successors, (33), 5 states have call predecessors, (33), 4 states have call successors, (33) [2023-12-02 12:26:22,844 INFO L276 IsEmpty]: Start isEmpty. Operand 26425 states and 34715 transitions. [2023-12-02 12:26:22,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2023-12-02 12:26:22,852 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:26:22,853 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 3, 3, 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] [2023-12-02 12:26:22,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 12:26:23,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:26:23,053 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:26:23,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:26:23,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1535951414, now seen corresponding path program 1 times [2023-12-02 12:26:23,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:26:23,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208512601] [2023-12-02 12:26:23,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:26:23,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:26:23,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:26:23,677 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 577 trivial. 0 not checked. [2023-12-02 12:26:23,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:26:23,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208512601] [2023-12-02 12:26:23,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208512601] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:26:23,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:26:23,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:26:23,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681477300] [2023-12-02 12:26:23,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:26:23,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:26:23,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:26:23,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:26:23,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:26:23,680 INFO L87 Difference]: Start difference. First operand 26425 states and 34715 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2023-12-02 12:26:25,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:26:27,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:26:29,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:26:33,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:26:35,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:26:37,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:26:39,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:26:39,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:26:39,350 INFO L93 Difference]: Finished difference Result 49939 states and 65112 transitions. [2023-12-02 12:26:39,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:26:39,351 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) Word has length 282 [2023-12-02 12:26:39,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:26:39,401 INFO L225 Difference]: With dead ends: 49939 [2023-12-02 12:26:39,401 INFO L226 Difference]: Without dead ends: 23649 [2023-12-02 12:26:39,441 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 12:26:39,442 INFO L413 NwaCegarLoop]: 1769 mSDtfsCounter, 959 mSDsluCounter, 1915 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 4 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 959 SdHoareTripleChecker+Valid, 3684 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:26:39,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [959 Valid, 3684 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 440 Invalid, 5 Unknown, 0 Unchecked, 14.5s Time] [2023-12-02 12:26:39,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23649 states. [2023-12-02 12:26:40,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23649 to 23486. [2023-12-02 12:26:40,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23486 states, 14624 states have (on average 1.2908916849015317) internal successors, (18878), 15021 states have internal predecessors, (18878), 5651 states have call successors, (5651), 3132 states have call predecessors, (5651), 3210 states have return successors, (5841), 5583 states have call predecessors, (5841), 5632 states have call successors, (5841) [2023-12-02 12:26:40,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23486 states to 23486 states and 30370 transitions. [2023-12-02 12:26:40,664 INFO L78 Accepts]: Start accepts. Automaton has 23486 states and 30370 transitions. Word has length 282 [2023-12-02 12:26:40,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:26:40,665 INFO L495 AbstractCegarLoop]: Abstraction has 23486 states and 30370 transitions. [2023-12-02 12:26:40,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 3 states have call successors, (39), 3 states have call predecessors, (39), 1 states have return successors, (37), 2 states have call predecessors, (37), 2 states have call successors, (37) [2023-12-02 12:26:40,665 INFO L276 IsEmpty]: Start isEmpty. Operand 23486 states and 30370 transitions. [2023-12-02 12:26:40,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2023-12-02 12:26:40,676 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:26:40,676 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:40,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-02 12:26:40,676 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:26:40,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:26:40,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1297006010, now seen corresponding path program 1 times [2023-12-02 12:26:40,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:26:40,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270112643] [2023-12-02 12:26:40,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:26:40,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:26:40,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:26:41,230 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2023-12-02 12:26:41,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:26:41,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270112643] [2023-12-02 12:26:41,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270112643] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:26:41,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970889601] [2023-12-02 12:26:41,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:26:41,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:26:41,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:26:41,232 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:26:41,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 12:26:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:26:42,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 3345 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 12:26:42,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:26:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 228 proven. 0 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2023-12-02 12:26:42,429 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:26:42,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970889601] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:26:42,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:26:42,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-12-02 12:26:42,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006953857] [2023-12-02 12:26:42,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:26:42,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:26:42,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:26:42,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:26:42,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:26:42,432 INFO L87 Difference]: Start difference. First operand 23486 states and 30370 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 5 states have call successors, (39), 4 states have call predecessors, (39), 3 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2023-12-02 12:26:44,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:26:45,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:26:54,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:26:56,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:26:58,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:27:00,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:27:02,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:27:04,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:27:06,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:27:08,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:27:10,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:27:10,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:27:10,342 INFO L93 Difference]: Finished difference Result 69753 states and 90184 transitions. [2023-12-02 12:27:10,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:27:10,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 5 states have call successors, (39), 4 states have call predecessors, (39), 3 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) Word has length 284 [2023-12-02 12:27:10,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:27:10,489 INFO L225 Difference]: With dead ends: 69753 [2023-12-02 12:27:10,489 INFO L226 Difference]: Without dead ends: 69745 [2023-12-02 12:27:10,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:27:10,507 INFO L413 NwaCegarLoop]: 1949 mSDtfsCounter, 2385 mSDsluCounter, 2583 mSDsCounter, 0 mSdLazyCounter, 2313 mSolverCounterSat, 14 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2386 SdHoareTripleChecker+Valid, 4532 SdHoareTripleChecker+Invalid, 2336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 2313 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.6s IncrementalHoareTripleChecker+Time [2023-12-02 12:27:10,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2386 Valid, 4532 Invalid, 2336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 2313 Invalid, 9 Unknown, 0 Unchecked, 24.6s Time] [2023-12-02 12:27:10,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69745 states. [2023-12-02 12:27:13,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69745 to 69497. [2023-12-02 12:27:13,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69497 states, 43268 states have (on average 1.2900526948322086) internal successors, (55818), 44445 states have internal predecessors, (55818), 16722 states have call successors, (16722), 9268 states have call predecessors, (16722), 9506 states have return successors, (17292), 16522 states have call predecessors, (17292), 16687 states have call successors, (17292) [2023-12-02 12:27:14,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69497 states to 69497 states and 89832 transitions. [2023-12-02 12:27:14,079 INFO L78 Accepts]: Start accepts. Automaton has 69497 states and 89832 transitions. Word has length 284 [2023-12-02 12:27:14,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:27:14,080 INFO L495 AbstractCegarLoop]: Abstraction has 69497 states and 89832 transitions. [2023-12-02 12:27:14,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 5 states have call successors, (39), 4 states have call predecessors, (39), 3 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2023-12-02 12:27:14,080 INFO L276 IsEmpty]: Start isEmpty. Operand 69497 states and 89832 transitions. [2023-12-02 12:27:14,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-12-02 12:27:14,093 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:27:14,094 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:27:14,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-02 12:27:14,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-12-02 12:27:14,294 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:27:14,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:27:14,295 INFO L85 PathProgramCache]: Analyzing trace with hash 541441399, now seen corresponding path program 1 times [2023-12-02 12:27:14,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:27:14,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199126037] [2023-12-02 12:27:14,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:27:14,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:27:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:27:15,006 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 598 trivial. 0 not checked. [2023-12-02 12:27:15,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:27:15,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199126037] [2023-12-02 12:27:15,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199126037] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:27:15,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:27:15,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:27:15,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027552816] [2023-12-02 12:27:15,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:27:15,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:27:15,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:27:15,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:27:15,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:27:15,008 INFO L87 Difference]: Start difference. First operand 69497 states and 89832 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2023-12-02 12:27:16,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:27:22,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:27:24,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:27:26,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:27:28,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:27:29,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:27:29,277 INFO L93 Difference]: Finished difference Result 139166 states and 179954 transitions. [2023-12-02 12:27:29,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:27:29,278 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 286 [2023-12-02 12:27:29,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:27:29,532 INFO L225 Difference]: With dead ends: 139166 [2023-12-02 12:27:29,532 INFO L226 Difference]: Without dead ends: 69706 [2023-12-02 12:27:29,622 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 12:27:29,623 INFO L413 NwaCegarLoop]: 1206 mSDtfsCounter, 1528 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 472 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1551 SdHoareTripleChecker+Valid, 2011 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:27:29,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1551 Valid, 2011 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [472 Valid, 302 Invalid, 4 Unknown, 0 Unchecked, 10.5s Time] [2023-12-02 12:27:29,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69706 states. [2023-12-02 12:27:33,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69706 to 69256. [2023-12-02 12:27:33,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69256 states, 43162 states have (on average 1.2890273851999443) internal successors, (55637), 44374 states have internal predecessors, (55637), 16671 states have call successors, (16671), 9160 states have call predecessors, (16671), 9422 states have return successors, (17241), 16460 states have call predecessors, (17241), 16636 states have call successors, (17241) [2023-12-02 12:27:33,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69256 states to 69256 states and 89549 transitions. [2023-12-02 12:27:33,895 INFO L78 Accepts]: Start accepts. Automaton has 69256 states and 89549 transitions. Word has length 286 [2023-12-02 12:27:33,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:27:33,895 INFO L495 AbstractCegarLoop]: Abstraction has 69256 states and 89549 transitions. [2023-12-02 12:27:33,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2023-12-02 12:27:33,896 INFO L276 IsEmpty]: Start isEmpty. Operand 69256 states and 89549 transitions. [2023-12-02 12:27:33,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-12-02 12:27:33,910 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:27:33,911 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:27:33,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-12-02 12:27:33,911 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:27:33,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:27:33,911 INFO L85 PathProgramCache]: Analyzing trace with hash 618714560, now seen corresponding path program 1 times [2023-12-02 12:27:33,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:27:33,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066065143] [2023-12-02 12:27:33,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:27:33,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:27:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:27:34,567 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2023-12-02 12:27:34,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:27:34,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066065143] [2023-12-02 12:27:34,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066065143] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:27:34,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743660177] [2023-12-02 12:27:34,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:27:34,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:27:34,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:27:34,568 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:27:34,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 12:27:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:27:35,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 3545 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 12:27:35,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:27:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 239 proven. 2 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2023-12-02 12:27:35,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:27:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2023-12-02 12:27:35,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743660177] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 12:27:35,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:27:35,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 5] total 11 [2023-12-02 12:27:35,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029218780] [2023-12-02 12:27:35,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:27:35,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:27:35,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:27:35,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:27:35,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 12:27:35,977 INFO L87 Difference]: Start difference. First operand 69256 states and 89549 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) [2023-12-02 12:27:37,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:27:47,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:27:49,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:27:50,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:27:50,025 INFO L93 Difference]: Finished difference Result 161153 states and 208056 transitions. [2023-12-02 12:27:50,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:27:50,026 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) Word has length 294 [2023-12-02 12:27:50,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:27:50,237 INFO L225 Difference]: With dead ends: 161153 [2023-12-02 12:27:50,237 INFO L226 Difference]: Without dead ends: 92032 [2023-12-02 12:27:50,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 584 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2023-12-02 12:27:50,345 INFO L413 NwaCegarLoop]: 1138 mSDtfsCounter, 2639 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 1306 mSolverCounterSat, 1129 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2748 SdHoareTripleChecker+Valid, 2765 SdHoareTripleChecker+Invalid, 2437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1129 IncrementalHoareTripleChecker+Valid, 1306 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:27:50,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2748 Valid, 2765 Invalid, 2437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1129 Valid, 1306 Invalid, 2 Unknown, 0 Unchecked, 9.0s Time] [2023-12-02 12:27:50,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92032 states. [2023-12-02 12:27:55,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92032 to 91246. [2023-12-02 12:27:55,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91246 states, 57181 states have (on average 1.293419142722233) internal successors, (73959), 58811 states have internal predecessors, (73959), 21444 states have call successors, (21444), 12298 states have call predecessors, (21444), 12620 states have return successors, (22170), 21157 states have call predecessors, (22170), 21409 states have call successors, (22170) [2023-12-02 12:27:55,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91246 states to 91246 states and 117573 transitions. [2023-12-02 12:27:55,910 INFO L78 Accepts]: Start accepts. Automaton has 91246 states and 117573 transitions. Word has length 294 [2023-12-02 12:27:55,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:27:55,911 INFO L495 AbstractCegarLoop]: Abstraction has 91246 states and 117573 transitions. [2023-12-02 12:27:55,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 3 states have call predecessors, (39), 3 states have call successors, (39) [2023-12-02 12:27:55,911 INFO L276 IsEmpty]: Start isEmpty. Operand 91246 states and 117573 transitions. [2023-12-02 12:27:55,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2023-12-02 12:27:55,943 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:27:55,943 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 4, 4, 3, 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] [2023-12-02 12:27:55,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 12:27:56,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-02 12:27:56,144 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:27:56,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:27:56,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1607132141, now seen corresponding path program 1 times [2023-12-02 12:27:56,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:27:56,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646043543] [2023-12-02 12:27:56,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:27:56,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:27:56,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:27:57,110 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2023-12-02 12:27:57,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:27:57,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646043543] [2023-12-02 12:27:57,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646043543] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:27:57,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970700621] [2023-12-02 12:27:57,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:27:57,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:27:57,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:27:57,112 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:27:57,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 12:27:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:27:58,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 3760 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 12:27:58,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:27:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 239 proven. 2 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2023-12-02 12:27:58,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:27:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 603 trivial. 0 not checked. [2023-12-02 12:27:58,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970700621] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 12:27:58,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:27:58,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 8] total 20 [2023-12-02 12:27:58,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228921837] [2023-12-02 12:27:58,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:27:58,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 12:27:58,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:27:58,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 12:27:58,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2023-12-02 12:27:58,718 INFO L87 Difference]: Start difference. First operand 91246 states and 117573 transitions. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 8 states have internal predecessors, (115), 4 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 5 states have call predecessors, (41), 4 states have call successors, (41) [2023-12-02 12:28:01,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:28:03,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:28:04,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:28:15,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:28:17,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:28:19,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:28:21,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:28:21,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:28:21,921 INFO L93 Difference]: Finished difference Result 197579 states and 254771 transitions. [2023-12-02 12:28:21,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 12:28:21,922 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 8 states have internal predecessors, (115), 4 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 5 states have call predecessors, (41), 4 states have call successors, (41) Word has length 313 [2023-12-02 12:28:21,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:28:22,221 INFO L225 Difference]: With dead ends: 197579 [2023-12-02 12:28:22,221 INFO L226 Difference]: Without dead ends: 106468 [2023-12-02 12:28:22,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 616 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2023-12-02 12:28:22,491 INFO L413 NwaCegarLoop]: 1108 mSDtfsCounter, 2711 mSDsluCounter, 3131 mSDsCounter, 0 mSdLazyCounter, 3383 mSolverCounterSat, 1265 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2796 SdHoareTripleChecker+Valid, 4239 SdHoareTripleChecker+Invalid, 4652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1265 IncrementalHoareTripleChecker+Valid, 3383 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:28:22,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2796 Valid, 4239 Invalid, 4652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1265 Valid, 3383 Invalid, 4 Unknown, 0 Unchecked, 17.4s Time] [2023-12-02 12:28:22,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106468 states. [2023-12-02 12:28:28,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106468 to 106228. [2023-12-02 12:28:28,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106228 states, 66958 states have (on average 1.2984856178499955) internal successors, (86944), 68886 states have internal predecessors, (86944), 24588 states have call successors, (24588), 14215 states have call predecessors, (24588), 14681 states have return successors, (25482), 24351 states have call predecessors, (25482), 24553 states have call successors, (25482) [2023-12-02 12:28:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106228 states to 106228 states and 137014 transitions. [2023-12-02 12:28:28,462 INFO L78 Accepts]: Start accepts. Automaton has 106228 states and 137014 transitions. Word has length 313 [2023-12-02 12:28:28,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:28:28,462 INFO L495 AbstractCegarLoop]: Abstraction has 106228 states and 137014 transitions. [2023-12-02 12:28:28,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 8 states have internal predecessors, (115), 4 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (41), 5 states have call predecessors, (41), 4 states have call successors, (41) [2023-12-02 12:28:28,463 INFO L276 IsEmpty]: Start isEmpty. Operand 106228 states and 137014 transitions. [2023-12-02 12:28:28,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2023-12-02 12:28:28,513 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:28:28,513 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 5, 5, 4, 3, 3, 3, 3, 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 12:28:28,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 12:28:28,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-02 12:28:28,714 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:28:28,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:28:28,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1562295581, now seen corresponding path program 1 times [2023-12-02 12:28:28,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:28:28,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140246668] [2023-12-02 12:28:28,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:28:28,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:28:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:28:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2023-12-02 12:28:29,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:28:29,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140246668] [2023-12-02 12:28:29,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140246668] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:28:29,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:28:29,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:28:29,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246390777] [2023-12-02 12:28:29,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:28:29,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:28:29,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:28:29,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:28:29,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:28:29,393 INFO L87 Difference]: Start difference. First operand 106228 states and 137014 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2023-12-02 12:28:32,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:28:42,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:28:44,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:28:44,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:28:44,830 INFO L93 Difference]: Finished difference Result 232286 states and 299820 transitions. [2023-12-02 12:28:44,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:28:44,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) Word has length 337 [2023-12-02 12:28:44,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:28:45,337 INFO L225 Difference]: With dead ends: 232286 [2023-12-02 12:28:45,337 INFO L226 Difference]: Without dead ends: 126193 [2023-12-02 12:28:45,547 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 12:28:45,547 INFO L413 NwaCegarLoop]: 1264 mSDtfsCounter, 944 mSDsluCounter, 1810 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 3074 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2023-12-02 12:28:45,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [949 Valid, 3074 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 830 Invalid, 2 Unknown, 0 Unchecked, 8.6s Time] [2023-12-02 12:28:45,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126193 states. [2023-12-02 12:28:53,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126193 to 124795. [2023-12-02 12:28:53,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124795 states, 79042 states have (on average 1.2997014245590952) internal successors, (102731), 81355 states have internal predecessors, (102731), 28548 states have call successors, (28548), 16630 states have call predecessors, (28548), 17204 states have return successors, (29598), 28298 states have call predecessors, (29598), 28513 states have call successors, (29598) [2023-12-02 12:28:54,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124795 states to 124795 states and 160877 transitions. [2023-12-02 12:28:54,073 INFO L78 Accepts]: Start accepts. Automaton has 124795 states and 160877 transitions. Word has length 337 [2023-12-02 12:28:54,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:28:54,073 INFO L495 AbstractCegarLoop]: Abstraction has 124795 states and 160877 transitions. [2023-12-02 12:28:54,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2023-12-02 12:28:54,073 INFO L276 IsEmpty]: Start isEmpty. Operand 124795 states and 160877 transitions. [2023-12-02 12:28:54,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2023-12-02 12:28:54,179 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:28:54,180 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 5, 5, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:28:54,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-12-02 12:28:54,180 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:28:54,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:28:54,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1425474922, now seen corresponding path program 1 times [2023-12-02 12:28:54,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:28:54,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569794017] [2023-12-02 12:28:54,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:28:54,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:28:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:28:55,256 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 622 trivial. 0 not checked. [2023-12-02 12:28:55,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:28:55,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569794017] [2023-12-02 12:28:55,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569794017] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:28:55,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:28:55,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 12:28:55,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888220083] [2023-12-02 12:28:55,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:28:55,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 12:28:55,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:28:55,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 12:28:55,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:28:55,259 INFO L87 Difference]: Start difference. First operand 124795 states and 160877 transitions. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 6 states have internal predecessors, (135), 4 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (46), 5 states have call predecessors, (46), 4 states have call successors, (46) [2023-12-02 12:28:57,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:28:59,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:29:02,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:29:11,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:29:13,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:29:15,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:29:17,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:29:22,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:29:22,103 INFO L93 Difference]: Finished difference Result 279406 states and 360590 transitions. [2023-12-02 12:29:22,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:29:22,104 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 6 states have internal predecessors, (135), 4 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (46), 5 states have call predecessors, (46), 4 states have call successors, (46) Word has length 356 [2023-12-02 12:29:22,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:29:22,538 INFO L225 Difference]: With dead ends: 279406 [2023-12-02 12:29:22,538 INFO L226 Difference]: Without dead ends: 154746 [2023-12-02 12:29:22,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-12-02 12:29:22,741 INFO L413 NwaCegarLoop]: 1234 mSDtfsCounter, 971 mSDsluCounter, 5071 mSDsCounter, 0 mSdLazyCounter, 1755 mSolverCounterSat, 68 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 6305 SdHoareTripleChecker+Invalid, 1830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1755 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:29:22,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [977 Valid, 6305 Invalid, 1830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1755 Invalid, 7 Unknown, 0 Unchecked, 18.0s Time] [2023-12-02 12:29:22,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154746 states. [2023-12-02 12:29:30,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154746 to 116203. [2023-12-02 12:29:30,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116203 states, 73282 states have (on average 1.2973035670423843) internal successors, (95069), 75403 states have internal predecessors, (95069), 26844 states have call successors, (26844), 15514 states have call predecessors, (26844), 16076 states have return successors, (27834), 26642 states have call predecessors, (27834), 26809 states have call successors, (27834) [2023-12-02 12:29:30,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116203 states to 116203 states and 149747 transitions. [2023-12-02 12:29:30,963 INFO L78 Accepts]: Start accepts. Automaton has 116203 states and 149747 transitions. Word has length 356 [2023-12-02 12:29:30,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:29:30,963 INFO L495 AbstractCegarLoop]: Abstraction has 116203 states and 149747 transitions. [2023-12-02 12:29:30,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 6 states have internal predecessors, (135), 4 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (46), 5 states have call predecessors, (46), 4 states have call successors, (46) [2023-12-02 12:29:30,964 INFO L276 IsEmpty]: Start isEmpty. Operand 116203 states and 149747 transitions. [2023-12-02 12:29:31,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2023-12-02 12:29:31,020 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:29:31,021 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:29:31,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-12-02 12:29:31,021 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:29:31,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:29:31,021 INFO L85 PathProgramCache]: Analyzing trace with hash 2094396632, now seen corresponding path program 1 times [2023-12-02 12:29:31,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:29:31,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775001929] [2023-12-02 12:29:31,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:29:31,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:29:31,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:29:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 773 trivial. 0 not checked. [2023-12-02 12:29:33,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:29:33,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775001929] [2023-12-02 12:29:33,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775001929] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:29:33,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820423770] [2023-12-02 12:29:33,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:29:33,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:29:33,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:29:33,117 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:29:33,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 12:29:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:29:37,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 4671 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-02 12:29:37,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:29:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 809 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 747 trivial. 0 not checked. [2023-12-02 12:29:37,744 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:29:37,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820423770] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:29:37,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:29:37,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 7 [2023-12-02 12:29:37,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189375750] [2023-12-02 12:29:37,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:29:37,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 12:29:37,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:29:37,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 12:29:37,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:29:37,746 INFO L87 Difference]: Start difference. First operand 116203 states and 149747 transitions. Second operand has 7 states, 6 states have (on average 22.666666666666668) internal successors, (136), 5 states have internal predecessors, (136), 2 states have call successors, (57), 2 states have call predecessors, (57), 4 states have return successors, (55), 4 states have call predecessors, (55), 2 states have call successors, (55) [2023-12-02 12:29:39,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:29:40,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:29:45,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:29:50,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:29:52,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:29:54,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:29:56,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:29:58,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:30:00,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:30:04,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:30:04,996 INFO L93 Difference]: Finished difference Result 232711 states and 300207 transitions. [2023-12-02 12:30:04,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:30:04,997 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 22.666666666666668) internal successors, (136), 5 states have internal predecessors, (136), 2 states have call successors, (57), 2 states have call predecessors, (57), 4 states have return successors, (55), 4 states have call predecessors, (55), 2 states have call successors, (55) Word has length 400 [2023-12-02 12:30:04,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:30:05,291 INFO L225 Difference]: With dead ends: 232711 [2023-12-02 12:30:05,291 INFO L226 Difference]: Without dead ends: 116643 [2023-12-02 12:30:05,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:30:05,601 INFO L413 NwaCegarLoop]: 1155 mSDtfsCounter, 3 mSDsluCounter, 5759 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 0 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6914 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:30:05,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6914 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 721 Invalid, 8 Unknown, 0 Unchecked, 21.0s Time] [2023-12-02 12:30:05,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116643 states. [2023-12-02 12:30:12,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116643 to 116463. [2023-12-02 12:30:13,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116463 states, 73472 states have (on average 1.2965347343205575) internal successors, (95259), 75568 states have internal predecessors, (95259), 26844 states have call successors, (26844), 15514 states have call predecessors, (26844), 16146 states have return successors, (28114), 26737 states have call predecessors, (28114), 26809 states have call successors, (28114) [2023-12-02 12:30:13,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116463 states to 116463 states and 150217 transitions. [2023-12-02 12:30:13,592 INFO L78 Accepts]: Start accepts. Automaton has 116463 states and 150217 transitions. Word has length 400 [2023-12-02 12:30:13,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:30:13,593 INFO L495 AbstractCegarLoop]: Abstraction has 116463 states and 150217 transitions. [2023-12-02 12:30:13,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 22.666666666666668) internal successors, (136), 5 states have internal predecessors, (136), 2 states have call successors, (57), 2 states have call predecessors, (57), 4 states have return successors, (55), 4 states have call predecessors, (55), 2 states have call successors, (55) [2023-12-02 12:30:13,593 INFO L276 IsEmpty]: Start isEmpty. Operand 116463 states and 150217 transitions. [2023-12-02 12:30:13,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2023-12-02 12:30:13,689 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:30:13,690 INFO L195 NwaCegarLoop]: trace histogram [16, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:30:13,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 12:30:13,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-02 12:30:13,891 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:30:13,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:30:13,891 INFO L85 PathProgramCache]: Analyzing trace with hash -258732392, now seen corresponding path program 1 times [2023-12-02 12:30:13,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:30:13,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908667940] [2023-12-02 12:30:13,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:30:13,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:30:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:30:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 959 trivial. 0 not checked. [2023-12-02 12:30:16,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:30:16,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908667940] [2023-12-02 12:30:16,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908667940] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:30:16,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487669785] [2023-12-02 12:30:16,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:30:16,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:30:16,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:30:16,480 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:30:16,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 12:30:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:30:20,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 4821 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 12:30:20,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:30:20,568 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 236 proven. 0 refuted. 0 times theorem prover too weak. 753 trivial. 0 not checked. [2023-12-02 12:30:20,568 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:30:20,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487669785] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:30:20,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:30:20,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 7 [2023-12-02 12:30:20,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471401105] [2023-12-02 12:30:20,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:30:20,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 12:30:20,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:30:20,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 12:30:20,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:30:20,571 INFO L87 Difference]: Start difference. First operand 116463 states and 150217 transitions. Second operand has 7 states, 6 states have (on average 24.0) internal successors, (144), 5 states have internal predecessors, (144), 2 states have call successors, (60), 2 states have call predecessors, (60), 4 states have return successors, (58), 4 states have call predecessors, (58), 2 states have call successors, (58) [2023-12-02 12:30:23,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:30:25,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:30:27,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:30:29,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:30:35,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:30:37,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:30:39,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:30:41,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:30:43,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:30:45,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 12:30:49,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:30:49,940 INFO L93 Difference]: Finished difference Result 233031 states and 300857 transitions. [2023-12-02 12:30:49,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:30:49,940 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 24.0) internal successors, (144), 5 states have internal predecessors, (144), 2 states have call successors, (60), 2 states have call predecessors, (60), 4 states have return successors, (58), 4 states have call predecessors, (58), 2 states have call successors, (58) Word has length 424 [2023-12-02 12:30:49,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:30:50,422 INFO L225 Difference]: With dead ends: 233031 [2023-12-02 12:30:50,422 INFO L226 Difference]: Without dead ends: 116703 [2023-12-02 12:30:50,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:30:50,625 INFO L413 NwaCegarLoop]: 1153 mSDtfsCounter, 0 mSDsluCounter, 5762 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 0 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6915 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.8s IncrementalHoareTripleChecker+Time [2023-12-02 12:30:50,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6915 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 713 Invalid, 9 Unknown, 0 Unchecked, 22.8s Time] [2023-12-02 12:30:50,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116703 states. [2023-12-02 12:30:57,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116703 to 116703. [2023-12-02 12:30:57,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116703 states, 73652 states have (on average 1.2958100255254439) internal successors, (95439), 75688 states have internal predecessors, (95439), 26844 states have call successors, (26844), 15514 states have call predecessors, (26844), 16206 states have return successors, (28294), 26857 states have call predecessors, (28294), 26809 states have call successors, (28294) [2023-12-02 12:30:57,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116703 states to 116703 states and 150577 transitions. [2023-12-02 12:30:57,838 INFO L78 Accepts]: Start accepts. Automaton has 116703 states and 150577 transitions. Word has length 424 [2023-12-02 12:30:57,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:30:57,839 INFO L495 AbstractCegarLoop]: Abstraction has 116703 states and 150577 transitions. [2023-12-02 12:30:57,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 24.0) internal successors, (144), 5 states have internal predecessors, (144), 2 states have call successors, (60), 2 states have call predecessors, (60), 4 states have return successors, (58), 4 states have call predecessors, (58), 2 states have call successors, (58) [2023-12-02 12:30:57,839 INFO L276 IsEmpty]: Start isEmpty. Operand 116703 states and 150577 transitions. [2023-12-02 12:30:57,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2023-12-02 12:30:57,909 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:30:57,909 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 7, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:30:57,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 12:30:58,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-02 12:30:58,110 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:30:58,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:30:58,110 INFO L85 PathProgramCache]: Analyzing trace with hash 507448708, now seen corresponding path program 2 times [2023-12-02 12:30:58,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:30:58,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626746515] [2023-12-02 12:30:58,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:30:58,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:30:58,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:31:00,617 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 14 proven. 22 refuted. 0 times theorem prover too weak. 817 trivial. 0 not checked. [2023-12-02 12:31:00,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:31:00,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626746515] [2023-12-02 12:31:00,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626746515] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:31:00,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915027342] [2023-12-02 12:31:00,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:31:00,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:31:00,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:31:00,619 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:31:00,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b22f49a4-0612-4492-84a4-8c73e7eb5ce5/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process