./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 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_2b10a478-f991-46bc-8e73-d6ebbfdd3ff9/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b10a478-f991-46bc-8e73-d6ebbfdd3ff9/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_2b10a478-f991-46bc-8e73-d6ebbfdd3ff9/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b10a478-f991-46bc-8e73-d6ebbfdd3ff9/bin/utaipan-verify-nQ1chXbOIh/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_2b10a478-f991-46bc-8e73-d6ebbfdd3ff9/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_2b10a478-f991-46bc-8e73-d6ebbfdd3ff9/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 aa6e6fe2f0ffa3b99fe1d04a5932e9785002708e85a4e6328b8f4c31fc0bed5a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:26:48,877 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:26:48,946 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b10a478-f991-46bc-8e73-d6ebbfdd3ff9/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 19:26:48,951 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:26:48,951 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:26:48,974 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:26:48,974 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:26:48,975 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:26:48,976 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:26:48,976 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:26:48,977 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:26:48,978 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:26:48,978 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:26:48,979 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 19:26:48,979 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:26:48,980 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:26:48,980 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 19:26:48,981 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 19:26:48,981 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:26:48,982 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 19:26:48,983 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 19:26:48,983 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 19:26:48,984 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:26:48,985 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 19:26:48,985 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 19:26:48,986 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:26:48,986 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 19:26:48,987 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:26:48,987 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 19:26:48,987 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 19:26:48,988 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:26:48,988 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:26:48,989 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:26:48,989 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:26:48,989 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:26:48,989 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:26:48,989 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:26:48,990 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 19:26:48,990 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 19:26:48,990 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 19:26:48,990 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:26:48,991 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 19:26:48,991 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:26:48,991 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:26:48,991 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_2b10a478-f991-46bc-8e73-d6ebbfdd3ff9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b10a478-f991-46bc-8e73-d6ebbfdd3ff9/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa6e6fe2f0ffa3b99fe1d04a5932e9785002708e85a4e6328b8f4c31fc0bed5a [2023-12-02 19:26:49,197 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:26:49,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:26:49,222 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:26:49,223 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:26:49,223 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:26:49,224 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b10a478-f991-46bc-8e73-d6ebbfdd3ff9/bin/utaipan-verify-nQ1chXbOIh/../../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 [2023-12-02 19:26:51,942 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:26:52,436 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:26:52,437 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b10a478-f991-46bc-8e73-d6ebbfdd3ff9/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 [2023-12-02 19:26:52,485 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b10a478-f991-46bc-8e73-d6ebbfdd3ff9/bin/utaipan-verify-nQ1chXbOIh/data/631583823/501563845a05431798ec92f0525d88b2/FLAGb9c11f3d2 [2023-12-02 19:26:52,499 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b10a478-f991-46bc-8e73-d6ebbfdd3ff9/bin/utaipan-verify-nQ1chXbOIh/data/631583823/501563845a05431798ec92f0525d88b2 [2023-12-02 19:26:52,501 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:26:52,503 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:26:52,504 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:26:52,505 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:26:52,510 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:26:52,510 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:26:52" (1/1) ... [2023-12-02 19:26:52,512 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19ba20e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:26:52, skipping insertion in model container [2023-12-02 19:26:52,512 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:26:52" (1/1) ... [2023-12-02 19:26:52,658 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:26:53,443 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_2b10a478-f991-46bc-8e73-d6ebbfdd3ff9/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] [2023-12-02 19:26:54,580 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:26:54,636 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 19:26:54,765 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] [2023-12-02 19:26:54,773 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_2b10a478-f991-46bc-8e73-d6ebbfdd3ff9/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] [2023-12-02 19:26:55,034 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:26:55,137 WARN L675 CHandler]: The function __VERIFIER_nondet_u16 is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:26:55,137 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:26:55,137 WARN L675 CHandler]: The function __VERIFIER_nondet_u8 is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:26:55,137 WARN L675 CHandler]: The function __VERIFIER_nondet_u32 is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 19:26:55,145 INFO L206 MainTranslator]: Completed translation [2023-12-02 19:26:55,146 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:26:55 WrapperNode [2023-12-02 19:26:55,146 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:26:55,147 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 19:26:55,147 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 19:26:55,147 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 19:26:55,155 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:26:55" (1/1) ... [2023-12-02 19:26:55,242 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:26:55" (1/1) ... [2023-12-02 19:26:55,374 INFO L138 Inliner]: procedures = 270, calls = 2836, calls flagged for inlining = 111, calls inlined = 38, statements flattened = 3277 [2023-12-02 19:26:55,374 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 19:26:55,375 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 19:26:55,375 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 19:26:55,375 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 19:26:55,384 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:26:55" (1/1) ... [2023-12-02 19:26:55,385 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:26:55" (1/1) ... [2023-12-02 19:26:55,443 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:26:55" (1/1) ... [2023-12-02 19:26:55,452 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:26:55" (1/1) ... [2023-12-02 19:26:55,536 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:26:55" (1/1) ... [2023-12-02 19:26:55,555 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:26:55" (1/1) ... [2023-12-02 19:26:55,573 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:26:55" (1/1) ... [2023-12-02 19:26:55,585 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:26:55" (1/1) ... [2023-12-02 19:26:55,606 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 19:26:55,607 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 19:26:55,607 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 19:26:55,607 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 19:26:55,608 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:26:55" (1/1) ... [2023-12-02 19:26:55,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:26:55,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b10a478-f991-46bc-8e73-d6ebbfdd3ff9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:26:55,637 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b10a478-f991-46bc-8e73-d6ebbfdd3ff9/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 19:26:55,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b10a478-f991-46bc-8e73-d6ebbfdd3ff9/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 19:26:55,676 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2023-12-02 19:26:55,676 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2023-12-02 19:26:55,676 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb_12 [2023-12-02 19:26:55,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb_12 [2023-12-02 19:26:55,677 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_load_radio_caps [2023-12-02 19:26:55,677 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_load_radio_caps [2023-12-02 19:26:55,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-12-02 19:26:55,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-12-02 19:26:55,678 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-12-02 19:26:55,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-12-02 19:26:55,678 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_conf_filter [2023-12-02 19:26:55,678 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_conf_filter [2023-12-02 19:26:55,678 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_hal_load_key [2023-12-02 19:26:55,678 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_hal_load_key [2023-12-02 19:26:55,678 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_remove_interface [2023-12-02 19:26:55,679 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_remove_interface [2023-12-02 19:26:55,679 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-12-02 19:26:55,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-12-02 19:26:55,679 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_sta_remove [2023-12-02 19:26:55,679 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_sta_remove [2023-12-02 19:26:55,679 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2023-12-02 19:26:55,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2023-12-02 19:26:55,680 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_config [2023-12-02 19:26:55,680 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_config [2023-12-02 19:26:55,680 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-12-02 19:26:55,680 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-12-02 19:26:55,680 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_is_data_qos [2023-12-02 19:26:55,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_is_data_qos [2023-12-02 19:26:55,680 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-12-02 19:26:55,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-12-02 19:26:55,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-12-02 19:26:55,681 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-12-02 19:26:55,681 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 19:26:55,681 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 19:26:55,681 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_send_internal_mgmt_frame [2023-12-02 19:26:55,681 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_send_internal_mgmt_frame [2023-12-02 19:26:55,682 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 19:26:55,682 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-12-02 19:26:55,682 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 19:26:55,682 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2023-12-02 19:26:55,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2023-12-02 19:26:55,682 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_start [2023-12-02 19:26:55,682 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_start [2023-12-02 19:26:55,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u32 [2023-12-02 19:26:55,683 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2023-12-02 19:26:55,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2023-12-02 19:26:55,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 19:26:55,683 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_hal_key_config [2023-12-02 19:26:55,683 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_hal_key_config [2023-12-02 19:26:55,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 19:26:55,683 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_tx [2023-12-02 19:26:55,684 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_tx [2023-12-02 19:26:55,684 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-12-02 19:26:55,684 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-12-02 19:26:55,684 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_set_rts_threshold [2023-12-02 19:26:55,684 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_set_rts_threshold [2023-12-02 19:26:55,684 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_queue_stopped [2023-12-02 19:26:55,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_queue_stopped [2023-12-02 19:26:55,685 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2023-12-02 19:26:55,685 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2023-12-02 19:26:55,685 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_set_key [2023-12-02 19:26:55,685 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_set_key [2023-12-02 19:26:55,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-12-02 19:26:55,685 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-12-02 19:26:55,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-12-02 19:26:55,686 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_add_interface [2023-12-02 19:26:55,686 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_add_interface [2023-12-02 19:26:55,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-12-02 19:26:55,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 19:26:55,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-12-02 19:26:55,686 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-12-02 19:26:55,686 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2023-12-02 19:26:55,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2023-12-02 19:26:55,687 INFO L130 BoogieDeclarations]: Found specification of procedure ether_addr_copy [2023-12-02 19:26:55,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ether_addr_copy [2023-12-02 19:26:55,687 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-12-02 19:26:55,687 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-12-02 19:26:55,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 19:26:55,687 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_send_aggregation_params_frame [2023-12-02 19:26:55,687 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_send_aggregation_params_frame [2023-12-02 19:26:55,688 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u16 [2023-12-02 19:26:55,688 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_set_rate_mask [2023-12-02 19:26:55,688 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_set_rate_mask [2023-12-02 19:26:55,688 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_hal_send_sta_notify_frame [2023-12-02 19:26:55,688 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_hal_send_sta_notify_frame [2023-12-02 19:26:55,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 19:26:55,688 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_sta_add [2023-12-02 19:26:55,689 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_sta_add [2023-12-02 19:26:55,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 19:26:55,689 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_dbg [2023-12-02 19:26:55,689 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_dbg [2023-12-02 19:26:55,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 19:26:55,689 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_ampdu_action [2023-12-02 19:26:55,689 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_ampdu_action [2023-12-02 19:26:55,690 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_len [2023-12-02 19:26:55,690 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_len [2023-12-02 19:26:55,690 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_set_event [2023-12-02 19:26:55,690 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_set_event [2023-12-02 19:26:55,690 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_bss_info_changed [2023-12-02 19:26:55,690 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_bss_info_changed [2023-12-02 19:26:55,690 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_tail [2023-12-02 19:26:55,690 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_tail [2023-12-02 19:26:55,691 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_conf_tx [2023-12-02 19:26:55,691 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_conf_tx [2023-12-02 19:26:55,691 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2023-12-02 19:26:55,691 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2023-12-02 19:26:55,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 19:26:55,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u8 [2023-12-02 19:26:55,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 19:26:55,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 19:26:55,692 INFO L130 BoogieDeclarations]: Found specification of procedure IEEE80211_SKB_CB [2023-12-02 19:26:55,692 INFO L138 BoogieDeclarations]: Found implementation of procedure IEEE80211_SKB_CB [2023-12-02 19:26:55,692 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-12-02 19:26:55,692 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-12-02 19:26:56,158 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 19:26:56,161 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 19:26:58,847 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-12-02 19:27:01,918 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 19:27:03,107 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 19:27:03,108 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-02 19:27:03,110 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:27:03 BoogieIcfgContainer [2023-12-02 19:27:03,110 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 19:27:03,113 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 19:27:03,113 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 19:27:03,116 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 19:27:03,116 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:26:52" (1/3) ... [2023-12-02 19:27:03,117 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@228c19af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:27:03, skipping insertion in model container [2023-12-02 19:27:03,117 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:26:55" (2/3) ... [2023-12-02 19:27:03,117 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@228c19af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:27:03, skipping insertion in model container [2023-12-02 19:27:03,117 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:27:03" (3/3) ... [2023-12-02 19:27:03,119 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 [2023-12-02 19:27:03,139 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 19:27:03,139 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 19:27:03,206 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:27:03,212 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;@2d41ccc0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:27:03,212 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 19:27:03,220 INFO L276 IsEmpty]: Start isEmpty. Operand has 636 states, 404 states have (on average 1.358910891089109) internal successors, (549), 412 states have internal predecessors, (549), 184 states have call successors, (184), 47 states have call predecessors, (184), 46 states have return successors, (181), 180 states have call predecessors, (181), 181 states have call successors, (181) [2023-12-02 19:27:03,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 19:27:03,229 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:27:03,230 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:27:03,230 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:27:03,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:27:03,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1260479747, now seen corresponding path program 1 times [2023-12-02 19:27:03,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:27:03,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747283240] [2023-12-02 19:27:03,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:27:03,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:27:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:27:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:27:04,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:27:04,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747283240] [2023-12-02 19:27:04,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747283240] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:27:04,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:27:04,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:27:04,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635503648] [2023-12-02 19:27:04,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:27:04,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:27:04,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:27:04,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:27:04,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:27:04,146 INFO L87 Difference]: Start difference. First operand has 636 states, 404 states have (on average 1.358910891089109) internal successors, (549), 412 states have internal predecessors, (549), 184 states have call successors, (184), 47 states have call predecessors, (184), 46 states have return successors, (181), 180 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) [2023-12-02 19:27:06,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:27:06,461 INFO L93 Difference]: Finished difference Result 1886 states and 2783 transitions. [2023-12-02 19:27:06,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:27:06,464 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 [2023-12-02 19:27:06,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:27:06,487 INFO L225 Difference]: With dead ends: 1886 [2023-12-02 19:27:06,487 INFO L226 Difference]: Without dead ends: 1241 [2023-12-02 19:27:06,497 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 19:27:06,501 INFO L413 NwaCegarLoop]: 813 mSDtfsCounter, 880 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 880 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:27:06,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [880 Valid, 1618 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 19:27:06,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2023-12-02 19:27:06,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1241. [2023-12-02 19:27:06,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 794 states have (on average 1.3400503778337531) internal successors, (1064), 800 states have internal predecessors, (1064), 356 states have call successors, (356), 91 states have call predecessors, (356), 90 states have return successors, (355), 353 states have call predecessors, (355), 355 states have call successors, (355) [2023-12-02 19:27:06,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 1775 transitions. [2023-12-02 19:27:06,675 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 1775 transitions. Word has length 15 [2023-12-02 19:27:06,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:27:06,676 INFO L495 AbstractCegarLoop]: Abstraction has 1241 states and 1775 transitions. [2023-12-02 19:27:06,676 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) [2023-12-02 19:27:06,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 1775 transitions. [2023-12-02 19:27:06,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 19:27:06,678 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:27:06,678 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:27:06,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 19:27:06,678 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:27:06,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:27:06,679 INFO L85 PathProgramCache]: Analyzing trace with hash -927207034, now seen corresponding path program 1 times [2023-12-02 19:27:06,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:27:06,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354788386] [2023-12-02 19:27:06,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:27:06,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:27:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:27:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:27:07,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:27:07,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354788386] [2023-12-02 19:27:07,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354788386] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:27:07,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:27:07,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:27:07,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615564801] [2023-12-02 19:27:07,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:27:07,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:27:07,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:27:07,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:27:07,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:27:07,060 INFO L87 Difference]: Start difference. First operand 1241 states and 1775 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) [2023-12-02 19:27:08,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:27:08,261 INFO L93 Difference]: Finished difference Result 2480 states and 3547 transitions. [2023-12-02 19:27:08,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:27:08,262 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 [2023-12-02 19:27:08,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:27:08,273 INFO L225 Difference]: With dead ends: 2480 [2023-12-02 19:27:08,274 INFO L226 Difference]: Without dead ends: 1240 [2023-12-02 19:27:08,280 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 19:27:08,282 INFO L413 NwaCegarLoop]: 804 mSDtfsCounter, 896 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:27:08,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [896 Valid, 804 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 19:27:08,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2023-12-02 19:27:08,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1240. [2023-12-02 19:27:08,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 793 states have (on average 1.3366960907944514) internal successors, (1060), 799 states have internal predecessors, (1060), 356 states have call successors, (356), 91 states have call predecessors, (356), 90 states have return successors, (355), 353 states have call predecessors, (355), 355 states have call successors, (355) [2023-12-02 19:27:08,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1771 transitions. [2023-12-02 19:27:08,393 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1771 transitions. Word has length 18 [2023-12-02 19:27:08,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:27:08,393 INFO L495 AbstractCegarLoop]: Abstraction has 1240 states and 1771 transitions. [2023-12-02 19:27:08,394 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) [2023-12-02 19:27:08,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1771 transitions. [2023-12-02 19:27:08,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 19:27:08,397 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:27:08,397 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] [2023-12-02 19:27:08,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 19:27:08,398 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:27:08,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:27:08,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1219351561, now seen corresponding path program 1 times [2023-12-02 19:27:08,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:27:08,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949229405] [2023-12-02 19:27:08,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:27:08,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:27:08,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:27:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 19:27:09,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:27:09,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949229405] [2023-12-02 19:27:09,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949229405] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:27:09,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:27:09,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 19:27:09,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571895108] [2023-12-02 19:27:09,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:27:09,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:27:09,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:27:09,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:27:09,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:27:09,282 INFO L87 Difference]: Start difference. First operand 1240 states and 1771 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) [2023-12-02 19:27:13,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:27:13,748 INFO L93 Difference]: Finished difference Result 2479 states and 3609 transitions. [2023-12-02 19:27:13,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:27:13,749 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 [2023-12-02 19:27:13,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:27:13,769 INFO L225 Difference]: With dead ends: 2479 [2023-12-02 19:27:13,770 INFO L226 Difference]: Without dead ends: 2472 [2023-12-02 19:27:13,772 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 [2023-12-02 19:27:13,774 INFO L413 NwaCegarLoop]: 952 mSDtfsCounter, 871 mSDsluCounter, 1756 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 2708 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-12-02 19:27:13,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [871 Valid, 2708 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-12-02 19:27:13,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2023-12-02 19:27:13,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2464. [2023-12-02 19:27:13,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 1573 states have (on average 1.3375715193897013) internal successors, (2104), 1585 states have internal predecessors, (2104), 710 states have call successors, (710), 181 states have call predecessors, (710), 180 states have return successors, (777), 705 states have call predecessors, (777), 709 states have call successors, (777) [2023-12-02 19:27:13,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 3591 transitions. [2023-12-02 19:27:13,956 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 3591 transitions. Word has length 46 [2023-12-02 19:27:13,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:27:13,956 INFO L495 AbstractCegarLoop]: Abstraction has 2464 states and 3591 transitions. [2023-12-02 19:27:13,956 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) [2023-12-02 19:27:13,957 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 3591 transitions. [2023-12-02 19:27:13,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-12-02 19:27:13,976 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:27:13,977 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] [2023-12-02 19:27:13,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 19:27:13,977 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:27:13,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:27:13,978 INFO L85 PathProgramCache]: Analyzing trace with hash -754755543, now seen corresponding path program 1 times [2023-12-02 19:27:13,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:27:13,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164382644] [2023-12-02 19:27:13,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:27:13,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:27:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:27:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2023-12-02 19:27:14,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:27:14,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164382644] [2023-12-02 19:27:14,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164382644] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:27:14,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:27:14,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:27:14,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280236411] [2023-12-02 19:27:14,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:27:14,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:27:14,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:27:14,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:27:14,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:27:14,537 INFO L87 Difference]: Start difference. First operand 2464 states and 3591 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2023-12-02 19:27:17,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:27:17,376 INFO L93 Difference]: Finished difference Result 7120 states and 10351 transitions. [2023-12-02 19:27:17,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:27:17,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 167 [2023-12-02 19:27:17,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:27:17,401 INFO L225 Difference]: With dead ends: 7120 [2023-12-02 19:27:17,401 INFO L226 Difference]: Without dead ends: 4657 [2023-12-02 19:27:17,410 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 19:27:17,412 INFO L413 NwaCegarLoop]: 912 mSDtfsCounter, 759 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 1589 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-02 19:27:17,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [759 Valid, 1589 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-12-02 19:27:17,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4657 states. [2023-12-02 19:27:17,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4657 to 4647. [2023-12-02 19:27:17,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4647 states, 3001 states have (on average 1.3152282572475842) internal successors, (3947), 3028 states have internal predecessors, (3947), 1289 states have call successors, (1289), 357 states have call predecessors, (1289), 356 states have return successors, (1400), 1277 states have call predecessors, (1400), 1288 states have call successors, (1400) [2023-12-02 19:27:17,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4647 states to 4647 states and 6636 transitions. [2023-12-02 19:27:17,649 INFO L78 Accepts]: Start accepts. Automaton has 4647 states and 6636 transitions. Word has length 167 [2023-12-02 19:27:17,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:27:17,650 INFO L495 AbstractCegarLoop]: Abstraction has 4647 states and 6636 transitions. [2023-12-02 19:27:17,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2023-12-02 19:27:17,651 INFO L276 IsEmpty]: Start isEmpty. Operand 4647 states and 6636 transitions. [2023-12-02 19:27:17,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-12-02 19:27:17,662 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:27:17,662 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] [2023-12-02 19:27:17,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 19:27:17,663 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:27:17,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:27:17,663 INFO L85 PathProgramCache]: Analyzing trace with hash 772907335, now seen corresponding path program 1 times [2023-12-02 19:27:17,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:27:17,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136454993] [2023-12-02 19:27:17,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:27:17,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:27:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:27:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2023-12-02 19:27:18,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:27:18,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136454993] [2023-12-02 19:27:18,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136454993] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:27:18,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:27:18,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 19:27:18,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334096211] [2023-12-02 19:27:18,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:27:18,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:27:18,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:27:18,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:27:18,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:27:18,449 INFO L87 Difference]: Start difference. First operand 4647 states and 6636 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) [2023-12-02 19:27:22,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:27:22,021 INFO L93 Difference]: Finished difference Result 9341 states and 13685 transitions. [2023-12-02 19:27:22,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:27:22,021 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 [2023-12-02 19:27:22,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:27:22,048 INFO L225 Difference]: With dead ends: 9341 [2023-12-02 19:27:22,048 INFO L226 Difference]: Without dead ends: 4695 [2023-12-02 19:27:22,069 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 [2023-12-02 19:27:22,070 INFO L413 NwaCegarLoop]: 804 mSDtfsCounter, 2 mSDsluCounter, 2407 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3211 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-12-02 19:27:22,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 3211 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-12-02 19:27:22,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4695 states. [2023-12-02 19:27:22,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4695 to 4687. [2023-12-02 19:27:22,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4687 states, 3029 states have (on average 1.3123142951469131) internal successors, (3975), 3060 states have internal predecessors, (3975), 1289 states have call successors, (1289), 357 states have call predecessors, (1289), 368 states have return successors, (1482), 1285 states have call predecessors, (1482), 1288 states have call successors, (1482) [2023-12-02 19:27:22,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4687 states to 4687 states and 6746 transitions. [2023-12-02 19:27:22,292 INFO L78 Accepts]: Start accepts. Automaton has 4687 states and 6746 transitions. Word has length 167 [2023-12-02 19:27:22,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:27:22,294 INFO L495 AbstractCegarLoop]: Abstraction has 4687 states and 6746 transitions. [2023-12-02 19:27:22,294 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) [2023-12-02 19:27:22,294 INFO L276 IsEmpty]: Start isEmpty. Operand 4687 states and 6746 transitions. [2023-12-02 19:27:22,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-12-02 19:27:22,309 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:27:22,310 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, 1] [2023-12-02 19:27:22,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 19:27:22,310 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:27:22,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:27:22,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1969590748, now seen corresponding path program 1 times [2023-12-02 19:27:22,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:27:22,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530182439] [2023-12-02 19:27:22,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:27:22,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:27:22,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:27:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2023-12-02 19:27:23,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:27:23,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530182439] [2023-12-02 19:27:23,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530182439] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:27:23,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920395301] [2023-12-02 19:27:23,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:27:23,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:27:23,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b10a478-f991-46bc-8e73-d6ebbfdd3ff9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:27:23,580 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b10a478-f991-46bc-8e73-d6ebbfdd3ff9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:27:23,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b10a478-f991-46bc-8e73-d6ebbfdd3ff9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 19:27:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:27:24,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 4701 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 19:27:24,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:27:24,994 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-12-02 19:27:24,995 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:27:24,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920395301] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:27:24,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:27:24,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-12-02 19:27:24,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49667813] [2023-12-02 19:27:24,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:27:24,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:27:24,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:27:24,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:27:24,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:27:24,997 INFO L87 Difference]: Start difference. First operand 4687 states and 6746 transitions. Second operand has 4 states, 3 states have (on average 30.333333333333332) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-12-02 19:27:27,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:27:27,987 INFO L93 Difference]: Finished difference Result 9389 states and 13795 transitions. [2023-12-02 19:27:27,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:27:27,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 30.333333333333332) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 182 [2023-12-02 19:27:27,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:27:28,018 INFO L225 Difference]: With dead ends: 9389 [2023-12-02 19:27:28,019 INFO L226 Difference]: Without dead ends: 4695 [2023-12-02 19:27:28,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-02 19:27:28,043 INFO L413 NwaCegarLoop]: 805 mSDtfsCounter, 1 mSDsluCounter, 1597 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 2402 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-02 19:27:28,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 2402 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-12-02 19:27:28,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4695 states. [2023-12-02 19:27:28,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4695 to 4695. [2023-12-02 19:27:28,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4695 states, 3037 states have (on average 1.311491603556141) internal successors, (3983), 3068 states have internal predecessors, (3983), 1289 states have call successors, (1289), 357 states have call predecessors, (1289), 368 states have return successors, (1482), 1285 states have call predecessors, (1482), 1288 states have call successors, (1482) [2023-12-02 19:27:28,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4695 states to 4695 states and 6754 transitions. [2023-12-02 19:27:28,284 INFO L78 Accepts]: Start accepts. Automaton has 4695 states and 6754 transitions. Word has length 182 [2023-12-02 19:27:28,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:27:28,285 INFO L495 AbstractCegarLoop]: Abstraction has 4695 states and 6754 transitions. [2023-12-02 19:27:28,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 30.333333333333332) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2023-12-02 19:27:28,285 INFO L276 IsEmpty]: Start isEmpty. Operand 4695 states and 6754 transitions. [2023-12-02 19:27:28,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-12-02 19:27:28,298 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:27:28,298 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 5, 3, 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] [2023-12-02 19:27:28,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b10a478-f991-46bc-8e73-d6ebbfdd3ff9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 19:27:28,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b10a478-f991-46bc-8e73-d6ebbfdd3ff9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:27:28,499 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:27:28,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:27:28,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1018544055, now seen corresponding path program 1 times [2023-12-02 19:27:28,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:27:28,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488538858] [2023-12-02 19:27:28,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:27:28,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:27:29,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:27:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2023-12-02 19:27:30,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:27:30,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488538858] [2023-12-02 19:27:30,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488538858] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:27:30,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438522986] [2023-12-02 19:27:30,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:27:30,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:27:30,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b10a478-f991-46bc-8e73-d6ebbfdd3ff9/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:27:30,268 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b10a478-f991-46bc-8e73-d6ebbfdd3ff9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:27:30,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b10a478-f991-46bc-8e73-d6ebbfdd3ff9/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 19:27:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:27:34,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 4802 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 19:27:34,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:27:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 71 proven. 1 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2023-12-02 19:27:34,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:27:34,746 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2023-12-02 19:27:34,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438522986] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:27:34,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [569320795] [2023-12-02 19:27:34,772 INFO L159 IcfgInterpreter]: Started Sifa with 115 locations of interest [2023-12-02 19:27:34,772 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:27:34,776 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:27:34,781 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:27:34,782 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:34:30,122 WARN L293 SmtUtils]: Spent 5.96s on a formula simplification that was a NOOP. DAG size: 7130 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 19:34:36,095 WARN L293 SmtUtils]: Spent 5.96s on a formula simplification that was a NOOP. DAG size: 7130 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 19:34:45,040 WARN L293 SmtUtils]: Spent 8.91s on a formula simplification. DAG size of input: 7131 DAG size of output: 7131 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 19:37:13,947 WARN L293 SmtUtils]: Spent 6.37s on a formula simplification that was a NOOP. DAG size: 6981 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-02 19:38:22,785 WARN L293 SmtUtils]: Spent 5.95s on a formula simplification that was a NOOP. DAG size: 6981 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-02 19:39:29,298 WARN L293 SmtUtils]: Spent 5.87s on a formula simplification that was a NOOP. DAG size: 6981 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-02 19:40:35,724 WARN L293 SmtUtils]: Spent 5.88s on a formula simplification that was a NOOP. DAG size: 6981 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)