./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--rsi--rsi_91x.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aad964b-ba3c-44b0-8e85-1082d9dbe70d/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aad964b-ba3c-44b0-8e85-1082d9dbe70d/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aad964b-ba3c-44b0-8e85-1082d9dbe70d/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aad964b-ba3c-44b0-8e85-1082d9dbe70d/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--rsi--rsi_91x.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aad964b-ba3c-44b0-8e85-1082d9dbe70d/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aad964b-ba3c-44b0-8e85-1082d9dbe70d/bin/utaipan-verify-QoSU8krkJ5 --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 aa6e6fe2f0ffa3b99fe1d04a5932e9785002708e85a4e6328b8f4c31fc0bed5a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:53:38,663 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:53:38,743 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aad964b-ba3c-44b0-8e85-1082d9dbe70d/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-21 19:53:38,749 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:53:38,750 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:53:38,778 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:53:38,779 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:53:38,780 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:53:38,781 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:53:38,781 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:53:38,782 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:53:38,783 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:53:38,783 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:53:38,784 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:53:38,784 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:53:38,785 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:53:38,785 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:53:38,786 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:53:38,786 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:53:38,787 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:53:38,787 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:53:38,788 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:53:38,789 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:53:38,789 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:53:38,790 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:53:38,790 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:53:38,790 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:53:38,791 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:53:38,791 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:53:38,792 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:53:38,792 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:53:38,792 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:53:38,793 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:53:38,793 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:53:38,793 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:53:38,794 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:53:38,794 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:53:38,794 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:53:38,794 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:53:38,795 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:53:38,795 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:53:38,795 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:53:38,795 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:53:38,795 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:53:38,796 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_2aad964b-ba3c-44b0-8e85-1082d9dbe70d/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aad964b-ba3c-44b0-8e85-1082d9dbe70d/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa6e6fe2f0ffa3b99fe1d04a5932e9785002708e85a4e6328b8f4c31fc0bed5a [2023-11-21 19:53:39,062 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:53:39,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:53:39,096 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:53:39,097 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:53:39,098 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:53:39,099 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aad964b-ba3c-44b0-8e85-1082d9dbe70d/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--rsi--rsi_91x.ko-entry_point.cil.out.i [2023-11-21 19:53:42,197 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:53:42,866 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:53:42,867 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aad964b-ba3c-44b0-8e85-1082d9dbe70d/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--rsi--rsi_91x.ko-entry_point.cil.out.i [2023-11-21 19:53:42,922 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aad964b-ba3c-44b0-8e85-1082d9dbe70d/bin/utaipan-verify-QoSU8krkJ5/data/cc6313e32/c7d49f5224d04faba84dfee0b46d527a/FLAG3580ee762 [2023-11-21 19:53:42,941 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aad964b-ba3c-44b0-8e85-1082d9dbe70d/bin/utaipan-verify-QoSU8krkJ5/data/cc6313e32/c7d49f5224d04faba84dfee0b46d527a [2023-11-21 19:53:42,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:53:42,949 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:53:42,950 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:53:42,951 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:53:42,961 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:53:42,962 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:53:42" (1/1) ... [2023-11-21 19:53:42,963 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b5f58bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:53:42, skipping insertion in model container [2023-11-21 19:53:42,963 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:53:42" (1/1) ... [2023-11-21 19:53:43,113 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:53:44,236 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_2aad964b-ba3c-44b0-8e85-1082d9dbe70d/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--rsi--rsi_91x.ko-entry_point.cil.out.i[197338,197351] [2023-11-21 19:53:45,697 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:53:45,779 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:53:46,036 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; incl %0": "+m" (v->counter)); [6725] [2023-11-21 19:53:46,045 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_2aad964b-ba3c-44b0-8e85-1082d9dbe70d/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--rsi--rsi_91x.ko-entry_point.cil.out.i[197338,197351] [2023-11-21 19:53:46,435 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:53:46,553 WARN L675 CHandler]: The function __VERIFIER_nondet_u16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:53:46,553 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:53:46,553 WARN L675 CHandler]: The function __VERIFIER_nondet_u8 is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:53:46,553 WARN L675 CHandler]: The function __VERIFIER_nondet_u32 is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:53:46,562 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:53:46,563 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:53:46 WrapperNode [2023-11-21 19:53:46,563 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:53:46,564 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:53:46,565 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:53:46,565 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:53:46,573 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:53:46" (1/1) ... [2023-11-21 19:53:46,700 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:53:46" (1/1) ... [2023-11-21 19:53:46,878 INFO L138 Inliner]: procedures = 270, calls = 2836, calls flagged for inlining = 111, calls inlined = 38, statements flattened = 3229 [2023-11-21 19:53:46,879 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:53:46,880 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:53:46,880 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:53:46,880 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:53:46,890 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:53:46" (1/1) ... [2023-11-21 19:53:46,890 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:53:46" (1/1) ... [2023-11-21 19:53:46,948 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:53:46" (1/1) ... [2023-11-21 19:53:46,960 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:53:46" (1/1) ... [2023-11-21 19:53:47,063 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:53:46" (1/1) ... [2023-11-21 19:53:47,081 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:53:46" (1/1) ... [2023-11-21 19:53:47,115 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:53:46" (1/1) ... [2023-11-21 19:53:47,134 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:53:46" (1/1) ... [2023-11-21 19:53:47,187 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:53:47,191 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:53:47,191 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:53:47,191 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:53:47,192 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:53:46" (1/1) ... [2023-11-21 19:53:47,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:53:47,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aad964b-ba3c-44b0-8e85-1082d9dbe70d/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:53:47,289 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aad964b-ba3c-44b0-8e85-1082d9dbe70d/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:53:47,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aad964b-ba3c-44b0-8e85-1082d9dbe70d/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:53:47,338 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2023-11-21 19:53:47,339 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2023-11-21 19:53:47,340 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb_12 [2023-11-21 19:53:47,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb_12 [2023-11-21 19:53:47,341 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_load_radio_caps [2023-11-21 19:53:47,341 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_load_radio_caps [2023-11-21 19:53:47,341 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-21 19:53:47,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-21 19:53:47,342 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-21 19:53:47,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-21 19:53:47,342 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_conf_filter [2023-11-21 19:53:47,342 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_conf_filter [2023-11-21 19:53:47,342 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_hal_load_key [2023-11-21 19:53:47,343 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_hal_load_key [2023-11-21 19:53:47,343 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_remove_interface [2023-11-21 19:53:47,344 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_remove_interface [2023-11-21 19:53:47,344 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-21 19:53:47,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-21 19:53:47,345 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_sta_remove [2023-11-21 19:53:47,345 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_sta_remove [2023-11-21 19:53:47,346 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2023-11-21 19:53:47,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2023-11-21 19:53:47,346 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_config [2023-11-21 19:53:47,347 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_config [2023-11-21 19:53:47,347 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-21 19:53:47,348 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-21 19:53:47,348 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_is_data_qos [2023-11-21 19:53:47,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_is_data_qos [2023-11-21 19:53:47,348 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-21 19:53:47,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-21 19:53:47,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-21 19:53:47,350 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-21 19:53:47,350 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-21 19:53:47,350 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-21 19:53:47,350 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_send_internal_mgmt_frame [2023-11-21 19:53:47,350 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_send_internal_mgmt_frame [2023-11-21 19:53:47,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 19:53:47,351 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-21 19:53:47,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 19:53:47,351 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2023-11-21 19:53:47,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2023-11-21 19:53:47,351 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_start [2023-11-21 19:53:47,351 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_start [2023-11-21 19:53:47,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u32 [2023-11-21 19:53:47,352 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2023-11-21 19:53:47,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2023-11-21 19:53:47,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 19:53:47,352 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_hal_key_config [2023-11-21 19:53:47,352 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_hal_key_config [2023-11-21 19:53:47,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-21 19:53:47,353 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_tx [2023-11-21 19:53:47,353 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_tx [2023-11-21 19:53:47,353 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-11-21 19:53:47,353 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-11-21 19:53:47,353 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_set_rts_threshold [2023-11-21 19:53:47,354 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_set_rts_threshold [2023-11-21 19:53:47,354 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_queue_stopped [2023-11-21 19:53:47,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_queue_stopped [2023-11-21 19:53:47,356 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2023-11-21 19:53:47,356 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2023-11-21 19:53:47,356 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_set_key [2023-11-21 19:53:47,356 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_set_key [2023-11-21 19:53:47,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-21 19:53:47,357 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-21 19:53:47,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-21 19:53:47,357 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_add_interface [2023-11-21 19:53:47,357 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_add_interface [2023-11-21 19:53:47,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-21 19:53:47,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 19:53:47,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-21 19:53:47,358 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-21 19:53:47,359 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2023-11-21 19:53:47,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2023-11-21 19:53:47,359 INFO L130 BoogieDeclarations]: Found specification of procedure ether_addr_copy [2023-11-21 19:53:47,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ether_addr_copy [2023-11-21 19:53:47,360 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-21 19:53:47,360 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-21 19:53:47,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 19:53:47,360 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_send_aggregation_params_frame [2023-11-21 19:53:47,360 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_send_aggregation_params_frame [2023-11-21 19:53:47,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u16 [2023-11-21 19:53:47,361 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_set_rate_mask [2023-11-21 19:53:47,362 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_set_rate_mask [2023-11-21 19:53:47,362 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_hal_send_sta_notify_frame [2023-11-21 19:53:47,362 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_hal_send_sta_notify_frame [2023-11-21 19:53:47,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 19:53:47,362 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_sta_add [2023-11-21 19:53:47,362 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_sta_add [2023-11-21 19:53:47,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:53:47,363 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_dbg [2023-11-21 19:53:47,363 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_dbg [2023-11-21 19:53:47,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 19:53:47,363 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_ampdu_action [2023-11-21 19:53:47,363 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_ampdu_action [2023-11-21 19:53:47,363 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_len [2023-11-21 19:53:47,364 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_len [2023-11-21 19:53:47,364 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_set_event [2023-11-21 19:53:47,364 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_set_event [2023-11-21 19:53:47,364 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_bss_info_changed [2023-11-21 19:53:47,364 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_bss_info_changed [2023-11-21 19:53:47,364 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_tail [2023-11-21 19:53:47,364 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_tail [2023-11-21 19:53:47,365 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_conf_tx [2023-11-21 19:53:47,365 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_conf_tx [2023-11-21 19:53:47,365 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2023-11-21 19:53:47,366 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2023-11-21 19:53:47,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:53:47,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u8 [2023-11-21 19:53:47,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:53:47,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:53:47,367 INFO L130 BoogieDeclarations]: Found specification of procedure IEEE80211_SKB_CB [2023-11-21 19:53:47,367 INFO L138 BoogieDeclarations]: Found implementation of procedure IEEE80211_SKB_CB [2023-11-21 19:53:47,367 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-11-21 19:53:47,367 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-11-21 19:53:47,940 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:53:47,943 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:53:50,310 INFO L774 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-21 19:53:54,359 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:53:56,055 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:53:56,056 INFO L308 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-21 19:53:56,058 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:53:56 BoogieIcfgContainer [2023-11-21 19:53:56,058 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:53:56,061 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:53:56,061 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:53:56,065 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:53:56,065 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:53:42" (1/3) ... [2023-11-21 19:53:56,066 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@497cf295 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:53:56, skipping insertion in model container [2023-11-21 19:53:56,066 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:53:46" (2/3) ... [2023-11-21 19:53:56,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@497cf295 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:53:56, skipping insertion in model container [2023-11-21 19:53:56,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:53:56" (3/3) ... [2023-11-21 19:53:56,068 INFO L112 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--rsi--rsi_91x.ko-entry_point.cil.out.i [2023-11-21 19:53:56,090 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:53:56,090 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 19:53:56,171 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:53:56,182 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;@130968c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:53:56,182 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 19:53:56,190 INFO L276 IsEmpty]: Start isEmpty. Operand has 622 states, 390 states have (on average 1.3717948717948718) internal successors, (535), 401 states have internal predecessors, (535), 184 states have call successors, (184), 47 states have call predecessors, (184), 46 states have return successors, (181), 178 states have call predecessors, (181), 181 states have call successors, (181) [2023-11-21 19:53:56,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 19:53:56,202 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:53:56,203 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:53:56,203 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:53:56,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:53:56,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1922038645, now seen corresponding path program 1 times [2023-11-21 19:53:56,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:53:56,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945685698] [2023-11-21 19:53:56,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:53:56,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:53:56,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:53:57,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:53:57,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:53:57,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945685698] [2023-11-21 19:53:57,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945685698] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:53:57,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:53:57,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:53:57,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025905401] [2023-11-21 19:53:57,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:53:57,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:53:57,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:53:57,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:53:57,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:53:57,525 INFO L87 Difference]: Start difference. First operand has 622 states, 390 states have (on average 1.3717948717948718) internal successors, (535), 401 states have internal predecessors, (535), 184 states have call successors, (184), 47 states have call predecessors, (184), 46 states have return successors, (181), 178 states have call predecessors, (181), 181 states have call successors, (181) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 19:54:00,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:54:00,930 INFO L93 Difference]: Finished difference Result 1844 states and 2741 transitions. [2023-11-21 19:54:00,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:54:00,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-11-21 19:54:00,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:54:00,970 INFO L225 Difference]: With dead ends: 1844 [2023-11-21 19:54:00,970 INFO L226 Difference]: Without dead ends: 1213 [2023-11-21 19:54:00,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:54:00,992 INFO L413 NwaCegarLoop]: 800 mSDtfsCounter, 866 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 1591 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:54:00,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [866 Valid, 1591 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-21 19:54:01,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2023-11-21 19:54:01,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1213. [2023-11-21 19:54:01,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 766 states have (on average 1.3524804177545693) internal successors, (1036), 778 states have internal predecessors, (1036), 356 states have call successors, (356), 91 states have call predecessors, (356), 90 states have return successors, (355), 349 states have call predecessors, (355), 355 states have call successors, (355) [2023-11-21 19:54:01,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1747 transitions. [2023-11-21 19:54:01,187 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1747 transitions. Word has length 15 [2023-11-21 19:54:01,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:54:01,187 INFO L495 AbstractCegarLoop]: Abstraction has 1213 states and 1747 transitions. [2023-11-21 19:54:01,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 19:54:01,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1747 transitions. [2023-11-21 19:54:01,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-21 19:54:01,190 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:54:01,190 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:54:01,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:54:01,190 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:54:01,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:54:01,191 INFO L85 PathProgramCache]: Analyzing trace with hash 414281674, now seen corresponding path program 1 times [2023-11-21 19:54:01,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:54:01,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599783284] [2023-11-21 19:54:01,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:54:01,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:54:01,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:54:01,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:54:01,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:54:01,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599783284] [2023-11-21 19:54:01,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599783284] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:54:01,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:54:01,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:54:01,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064526700] [2023-11-21 19:54:01,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:54:01,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:54:01,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:54:01,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:54:01,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:54:01,841 INFO L87 Difference]: Start difference. First operand 1213 states and 1747 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 19:54:03,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:54:03,233 INFO L93 Difference]: Finished difference Result 2424 states and 3491 transitions. [2023-11-21 19:54:03,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:54:03,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-11-21 19:54:03,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:54:03,246 INFO L225 Difference]: With dead ends: 2424 [2023-11-21 19:54:03,247 INFO L226 Difference]: Without dead ends: 1212 [2023-11-21 19:54:03,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:54:03,255 INFO L413 NwaCegarLoop]: 791 mSDtfsCounter, 882 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:54:03,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [882 Valid, 791 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-21 19:54:03,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2023-11-21 19:54:03,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 1212. [2023-11-21 19:54:03,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 765 states have (on average 1.3490196078431373) internal successors, (1032), 777 states have internal predecessors, (1032), 356 states have call successors, (356), 91 states have call predecessors, (356), 90 states have return successors, (355), 349 states have call predecessors, (355), 355 states have call successors, (355) [2023-11-21 19:54:03,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1743 transitions. [2023-11-21 19:54:03,376 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1743 transitions. Word has length 18 [2023-11-21 19:54:03,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:54:03,376 INFO L495 AbstractCegarLoop]: Abstraction has 1212 states and 1743 transitions. [2023-11-21 19:54:03,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 19:54:03,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1743 transitions. [2023-11-21 19:54:03,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-21 19:54:03,385 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:54:03,386 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-11-21 19:54:03,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 19:54:03,386 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:54:03,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:54:03,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1976125810, now seen corresponding path program 1 times [2023-11-21 19:54:03,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:54:03,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119632973] [2023-11-21 19:54:03,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:54:03,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:54:03,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:54:04,466 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-21 19:54:04,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:54:04,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119632973] [2023-11-21 19:54:04,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119632973] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:54:04,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:54:04,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:54:04,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192424764] [2023-11-21 19:54:04,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:54:04,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:54:04,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:54:04,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:54:04,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 19:54:04,482 INFO L87 Difference]: Start difference. First operand 1212 states and 1743 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-21 19:54:09,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:54:09,830 INFO L93 Difference]: Finished difference Result 2423 states and 3553 transitions. [2023-11-21 19:54:09,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:54:09,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2023-11-21 19:54:09,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:54:09,854 INFO L225 Difference]: With dead ends: 2423 [2023-11-21 19:54:09,854 INFO L226 Difference]: Without dead ends: 2416 [2023-11-21 19:54:09,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:54:09,858 INFO L413 NwaCegarLoop]: 937 mSDtfsCounter, 857 mSDsluCounter, 1728 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 2665 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:54:09,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [857 Valid, 2665 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-11-21 19:54:09,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2023-11-21 19:54:10,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2408. [2023-11-21 19:54:10,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 1517 states have (on average 1.3500329597890572) internal successors, (2048), 1541 states have internal predecessors, (2048), 710 states have call successors, (710), 181 states have call predecessors, (710), 180 states have return successors, (777), 697 states have call predecessors, (777), 709 states have call successors, (777) [2023-11-21 19:54:10,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 3535 transitions. [2023-11-21 19:54:10,192 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 3535 transitions. Word has length 46 [2023-11-21 19:54:10,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:54:10,193 INFO L495 AbstractCegarLoop]: Abstraction has 2408 states and 3535 transitions. [2023-11-21 19:54:10,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-21 19:54:10,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 3535 transitions. [2023-11-21 19:54:10,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-21 19:54:10,221 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:54:10,227 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 5, 3, 3, 3, 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] [2023-11-21 19:54:10,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 19:54:10,228 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:54:10,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:54:10,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1688108695, now seen corresponding path program 1 times [2023-11-21 19:54:10,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:54:10,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546611935] [2023-11-21 19:54:10,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:54:10,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:54:10,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:54:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2023-11-21 19:54:10,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:54:10,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546611935] [2023-11-21 19:54:10,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546611935] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:54:10,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:54:10,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:54:10,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124873959] [2023-11-21 19:54:10,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:54:10,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:54:10,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:54:10,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:54:10,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:54:10,976 INFO L87 Difference]: Start difference. First operand 2408 states and 3535 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-11-21 19:54:14,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:54:14,135 INFO L93 Difference]: Finished difference Result 3687 states and 5401 transitions. [2023-11-21 19:54:14,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:54:14,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 167 [2023-11-21 19:54:14,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:54:14,152 INFO L225 Difference]: With dead ends: 3687 [2023-11-21 19:54:14,153 INFO L226 Difference]: Without dead ends: 1280 [2023-11-21 19:54:14,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:54:14,167 INFO L413 NwaCegarLoop]: 796 mSDtfsCounter, 29 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:54:14,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 1503 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-21 19:54:14,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2023-11-21 19:54:14,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1264. [2023-11-21 19:54:14,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 809 states have (on average 1.3522867737948083) internal successors, (1094), 822 states have internal predecessors, (1094), 361 states have call successors, (361), 94 states have call predecessors, (361), 93 states have return successors, (394), 353 states have call predecessors, (394), 360 states have call successors, (394) [2023-11-21 19:54:14,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 1849 transitions. [2023-11-21 19:54:14,259 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 1849 transitions. Word has length 167 [2023-11-21 19:54:14,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:54:14,260 INFO L495 AbstractCegarLoop]: Abstraction has 1264 states and 1849 transitions. [2023-11-21 19:54:14,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-11-21 19:54:14,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 1849 transitions. [2023-11-21 19:54:14,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-21 19:54:14,267 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:54:14,268 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 4, 3, 3, 3, 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] [2023-11-21 19:54:14,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 19:54:14,268 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:54:14,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:54:14,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1138974798, now seen corresponding path program 1 times [2023-11-21 19:54:14,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:54:14,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96057743] [2023-11-21 19:54:14,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:54:14,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:54:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:54:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2023-11-21 19:54:14,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:54:14,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96057743] [2023-11-21 19:54:14,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96057743] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:54:14,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:54:14,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:54:14,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617638343] [2023-11-21 19:54:14,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:54:14,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:54:14,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:54:14,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:54:14,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:54:14,780 INFO L87 Difference]: Start difference. First operand 1264 states and 1849 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2023-11-21 19:54:18,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:54:18,046 INFO L93 Difference]: Finished difference Result 3593 states and 5249 transitions. [2023-11-21 19:54:18,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:54:18,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 167 [2023-11-21 19:54:18,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:54:18,068 INFO L225 Difference]: With dead ends: 3593 [2023-11-21 19:54:18,068 INFO L226 Difference]: Without dead ends: 2343 [2023-11-21 19:54:18,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:54:18,078 INFO L413 NwaCegarLoop]: 783 mSDtfsCounter, 753 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 1447 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:54:18,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [753 Valid, 1447 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-21 19:54:18,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2343 states. [2023-11-21 19:54:18,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2343 to 2327. [2023-11-21 19:54:18,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2327 states, 1495 states have (on average 1.3311036789297659) internal successors, (1990), 1521 states have internal predecessors, (1990), 650 states have call successors, (650), 182 states have call predecessors, (650), 181 states have return successors, (705), 635 states have call predecessors, (705), 649 states have call successors, (705) [2023-11-21 19:54:18,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2327 states to 2327 states and 3345 transitions. [2023-11-21 19:54:18,241 INFO L78 Accepts]: Start accepts. Automaton has 2327 states and 3345 transitions. Word has length 167 [2023-11-21 19:54:18,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:54:18,244 INFO L495 AbstractCegarLoop]: Abstraction has 2327 states and 3345 transitions. [2023-11-21 19:54:18,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2023-11-21 19:54:18,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2327 states and 3345 transitions. [2023-11-21 19:54:18,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-21 19:54:18,253 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:54:18,253 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 5, 3, 3, 3, 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] [2023-11-21 19:54:18,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 19:54:18,254 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:54:18,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:54:18,254 INFO L85 PathProgramCache]: Analyzing trace with hash 162752121, now seen corresponding path program 1 times [2023-11-21 19:54:18,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:54:18,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143571533] [2023-11-21 19:54:18,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:54:18,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:54:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:54:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2023-11-21 19:54:19,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:54:19,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143571533] [2023-11-21 19:54:19,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143571533] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:54:19,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:54:19,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 19:54:19,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487904203] [2023-11-21 19:54:19,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:54:19,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:54:19,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:54:19,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:54:19,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:54:19,513 INFO L87 Difference]: Start difference. First operand 2327 states and 3345 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) [2023-11-21 19:54:24,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:54:24,143 INFO L93 Difference]: Finished difference Result 4664 states and 6882 transitions. [2023-11-21 19:54:24,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 19:54:24,144 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) Word has length 167 [2023-11-21 19:54:24,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:54:24,169 INFO L225 Difference]: With dead ends: 4664 [2023-11-21 19:54:24,169 INFO L226 Difference]: Without dead ends: 2351 [2023-11-21 19:54:24,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:54:24,185 INFO L413 NwaCegarLoop]: 791 mSDtfsCounter, 2 mSDsluCounter, 2368 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3159 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-21 19:54:24,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 3159 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-11-21 19:54:24,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2023-11-21 19:54:24,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 2347. [2023-11-21 19:54:24,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 1509 states have (on average 1.3280318091451293) internal successors, (2004), 1537 states have internal predecessors, (2004), 650 states have call successors, (650), 182 states have call predecessors, (650), 187 states have return successors, (749), 639 states have call predecessors, (749), 649 states have call successors, (749) [2023-11-21 19:54:24,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 3403 transitions. [2023-11-21 19:54:24,362 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 3403 transitions. Word has length 167 [2023-11-21 19:54:24,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:54:24,364 INFO L495 AbstractCegarLoop]: Abstraction has 2347 states and 3403 transitions. [2023-11-21 19:54:24,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 3 states have call predecessors, (25), 2 states have call successors, (25) [2023-11-21 19:54:24,365 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 3403 transitions. [2023-11-21 19:54:24,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-11-21 19:54:24,373 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:54:24,374 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 4, 3, 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] [2023-11-21 19:54:24,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 19:54:24,374 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:54:24,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:54:24,375 INFO L85 PathProgramCache]: Analyzing trace with hash 406948125, now seen corresponding path program 1 times [2023-11-21 19:54:24,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:54:24,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104243483] [2023-11-21 19:54:24,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:54:24,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:54:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:54:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2023-11-21 19:54:26,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:54:26,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104243483] [2023-11-21 19:54:26,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104243483] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:54:26,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081706710] [2023-11-21 19:54:26,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:54:26,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:54:26,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aad964b-ba3c-44b0-8e85-1082d9dbe70d/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:54:26,528 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aad964b-ba3c-44b0-8e85-1082d9dbe70d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:54:26,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2aad964b-ba3c-44b0-8e85-1082d9dbe70d/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process