./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 30e01a73 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_68d71565-059f-4def-b426-19786c7792a8/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d71565-059f-4def-b426-19786c7792a8/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d71565-059f-4def-b426-19786c7792a8/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d71565-059f-4def-b426-19786c7792a8/bin/utaipan-verify-mE87zJ7Ire/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_68d71565-059f-4def-b426-19786c7792a8/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d71565-059f-4def-b426-19786c7792a8/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash aa6e6fe2f0ffa3b99fe1d04a5932e9785002708e85a4e6328b8f4c31fc0bed5a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:11:56,388 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:11:56,454 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d71565-059f-4def-b426-19786c7792a8/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:11:56,460 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:11:56,461 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:11:56,485 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:11:56,486 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:11:56,487 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:11:56,488 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:11:56,488 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:11:56,489 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:11:56,490 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:11:56,490 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:11:56,491 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:11:56,491 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:11:56,492 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:11:56,493 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:11:56,493 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:11:56,494 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:11:56,494 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:11:56,495 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:11:56,496 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:11:56,496 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:11:56,497 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:11:56,497 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:11:56,498 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:11:56,498 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:11:56,499 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:11:56,499 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:11:56,500 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:11:56,500 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:11:56,501 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:11:56,501 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:11:56,501 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:11:56,502 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:11:56,502 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:11:56,502 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:11:56,502 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:11:56,503 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:11:56,503 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:11:56,503 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:11:56,504 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:11:56,504 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:11:56,504 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:11:56,505 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_68d71565-059f-4def-b426-19786c7792a8/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d71565-059f-4def-b426-19786c7792a8/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa6e6fe2f0ffa3b99fe1d04a5932e9785002708e85a4e6328b8f4c31fc0bed5a [2023-11-23 21:11:56,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:11:56,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:11:56,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:11:56,806 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:11:56,806 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:11:56,808 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d71565-059f-4def-b426-19786c7792a8/bin/utaipan-verify-mE87zJ7Ire/../../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 [2023-11-23 21:11:59,865 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:12:00,527 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:12:00,527 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d71565-059f-4def-b426-19786c7792a8/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 [2023-11-23 21:12:00,582 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d71565-059f-4def-b426-19786c7792a8/bin/utaipan-verify-mE87zJ7Ire/data/b5d0f01ae/c0bf99dba2144d30b6f23be3bd1052d8/FLAG1fc5c6f4b [2023-11-23 21:12:00,600 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d71565-059f-4def-b426-19786c7792a8/bin/utaipan-verify-mE87zJ7Ire/data/b5d0f01ae/c0bf99dba2144d30b6f23be3bd1052d8 [2023-11-23 21:12:00,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:12:00,609 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:12:00,613 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:12:00,613 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:12:00,619 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:12:00,621 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:12:00" (1/1) ... [2023-11-23 21:12:00,623 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c8fdcae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:00, skipping insertion in model container [2023-11-23 21:12:00,623 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:12:00" (1/1) ... [2023-11-23 21:12:00,811 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:12:01,908 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_68d71565-059f-4def-b426-19786c7792a8/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] [2023-11-23 21:12:03,380 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:12:03,474 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:12:03,665 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] [2023-11-23 21:12:03,675 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_68d71565-059f-4def-b426-19786c7792a8/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] [2023-11-23 21:12:04,059 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:12:04,243 WARN L675 CHandler]: The function __VERIFIER_nondet_u16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:12:04,243 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:12:04,243 WARN L675 CHandler]: The function __VERIFIER_nondet_u8 is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:12:04,243 WARN L675 CHandler]: The function __VERIFIER_nondet_u32 is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:12:04,252 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:12:04,252 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:04 WrapperNode [2023-11-23 21:12:04,253 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:12:04,254 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:12:04,254 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:12:04,254 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:12:04,263 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:04" (1/1) ... [2023-11-23 21:12:04,379 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:04" (1/1) ... [2023-11-23 21:12:04,523 INFO L138 Inliner]: procedures = 270, calls = 2836, calls flagged for inlining = 111, calls inlined = 38, statements flattened = 3229 [2023-11-23 21:12:04,524 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:12:04,524 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:12:04,525 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:12:04,525 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:12:04,535 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:04" (1/1) ... [2023-11-23 21:12:04,535 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:04" (1/1) ... [2023-11-23 21:12:04,557 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:04" (1/1) ... [2023-11-23 21:12:04,557 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:04" (1/1) ... [2023-11-23 21:12:04,699 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:04" (1/1) ... [2023-11-23 21:12:04,727 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:04" (1/1) ... [2023-11-23 21:12:04,773 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:04" (1/1) ... [2023-11-23 21:12:04,795 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:04" (1/1) ... [2023-11-23 21:12:04,818 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:12:04,819 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:12:04,819 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:12:04,819 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:12:04,820 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:04" (1/1) ... [2023-11-23 21:12:04,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:12:04,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d71565-059f-4def-b426-19786c7792a8/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:12:04,857 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d71565-059f-4def-b426-19786c7792a8/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:12:04,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d71565-059f-4def-b426-19786c7792a8/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:12:04,899 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2023-11-23 21:12:04,899 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2023-11-23 21:12:04,901 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb_12 [2023-11-23 21:12:04,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb_12 [2023-11-23 21:12:04,902 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_load_radio_caps [2023-11-23 21:12:04,902 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_load_radio_caps [2023-11-23 21:12:04,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-23 21:12:04,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-23 21:12:04,903 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 21:12:04,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 21:12:04,903 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_conf_filter [2023-11-23 21:12:04,903 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_conf_filter [2023-11-23 21:12:04,903 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_hal_load_key [2023-11-23 21:12:04,904 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_hal_load_key [2023-11-23 21:12:04,904 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_remove_interface [2023-11-23 21:12:04,905 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_remove_interface [2023-11-23 21:12:04,905 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 21:12:04,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 21:12:04,905 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_sta_remove [2023-11-23 21:12:04,906 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_sta_remove [2023-11-23 21:12:04,907 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2023-11-23 21:12:04,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2023-11-23 21:12:04,907 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_config [2023-11-23 21:12:04,907 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_config [2023-11-23 21:12:04,957 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-23 21:12:04,957 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-23 21:12:04,958 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_is_data_qos [2023-11-23 21:12:04,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_is_data_qos [2023-11-23 21:12:04,958 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 21:12:04,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 21:12:04,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-23 21:12:04,958 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-23 21:12:04,958 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:12:04,958 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:12:04,959 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_send_internal_mgmt_frame [2023-11-23 21:12:04,959 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_send_internal_mgmt_frame [2023-11-23 21:12:04,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:12:04,959 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-23 21:12:04,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:12:04,959 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2023-11-23 21:12:04,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2023-11-23 21:12:04,959 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_start [2023-11-23 21:12:04,959 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_start [2023-11-23 21:12:04,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u32 [2023-11-23 21:12:04,960 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2023-11-23 21:12:04,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2023-11-23 21:12:04,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:12:04,960 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_hal_key_config [2023-11-23 21:12:04,960 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_hal_key_config [2023-11-23 21:12:04,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:12:04,960 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_tx [2023-11-23 21:12:04,960 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_tx [2023-11-23 21:12:04,960 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-11-23 21:12:04,961 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-11-23 21:12:04,961 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_set_rts_threshold [2023-11-23 21:12:04,961 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_set_rts_threshold [2023-11-23 21:12:04,961 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_queue_stopped [2023-11-23 21:12:04,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_queue_stopped [2023-11-23 21:12:04,961 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2023-11-23 21:12:04,961 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2023-11-23 21:12:04,961 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_set_key [2023-11-23 21:12:04,962 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_set_key [2023-11-23 21:12:04,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-23 21:12:04,962 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-23 21:12:04,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-23 21:12:04,962 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_add_interface [2023-11-23 21:12:04,962 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_add_interface [2023-11-23 21:12:04,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 21:12:04,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:12:04,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-23 21:12:04,963 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-23 21:12:04,963 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2023-11-23 21:12:04,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2023-11-23 21:12:04,963 INFO L130 BoogieDeclarations]: Found specification of procedure ether_addr_copy [2023-11-23 21:12:04,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ether_addr_copy [2023-11-23 21:12:04,963 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-23 21:12:04,963 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-23 21:12:04,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:12:04,963 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_send_aggregation_params_frame [2023-11-23 21:12:04,964 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_send_aggregation_params_frame [2023-11-23 21:12:04,964 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u16 [2023-11-23 21:12:04,964 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_set_rate_mask [2023-11-23 21:12:04,964 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_set_rate_mask [2023-11-23 21:12:04,964 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_hal_send_sta_notify_frame [2023-11-23 21:12:04,964 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_hal_send_sta_notify_frame [2023-11-23 21:12:04,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:12:04,964 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_sta_add [2023-11-23 21:12:04,964 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_sta_add [2023-11-23 21:12:04,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:12:04,965 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_dbg [2023-11-23 21:12:04,965 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_dbg [2023-11-23 21:12:04,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:12:04,965 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_ampdu_action [2023-11-23 21:12:04,965 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_ampdu_action [2023-11-23 21:12:04,965 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_len [2023-11-23 21:12:04,965 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_len [2023-11-23 21:12:04,965 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_set_event [2023-11-23 21:12:04,965 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_set_event [2023-11-23 21:12:04,966 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_bss_info_changed [2023-11-23 21:12:04,966 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_bss_info_changed [2023-11-23 21:12:04,966 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_tail [2023-11-23 21:12:04,966 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_tail [2023-11-23 21:12:04,966 INFO L130 BoogieDeclarations]: Found specification of procedure rsi_mac80211_conf_tx [2023-11-23 21:12:04,966 INFO L138 BoogieDeclarations]: Found implementation of procedure rsi_mac80211_conf_tx [2023-11-23 21:12:04,966 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2023-11-23 21:12:04,966 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2023-11-23 21:12:04,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:12:04,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u8 [2023-11-23 21:12:04,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:12:04,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:12:04,967 INFO L130 BoogieDeclarations]: Found specification of procedure IEEE80211_SKB_CB [2023-11-23 21:12:04,967 INFO L138 BoogieDeclarations]: Found implementation of procedure IEEE80211_SKB_CB [2023-11-23 21:12:04,967 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-11-23 21:12:04,967 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-11-23 21:12:05,514 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:12:05,518 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:12:07,521 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 21:12:11,374 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:12:12,856 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:12:12,856 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-23 21:12:12,859 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:12:12 BoogieIcfgContainer [2023-11-23 21:12:12,859 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:12:12,863 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:12:12,863 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:12:12,867 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:12:12,868 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:12:00" (1/3) ... [2023-11-23 21:12:12,869 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66e1d7a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:12:12, skipping insertion in model container [2023-11-23 21:12:12,870 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:12:04" (2/3) ... [2023-11-23 21:12:12,870 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66e1d7a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:12:12, skipping insertion in model container [2023-11-23 21:12:12,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:12:12" (3/3) ... [2023-11-23 21:12:12,874 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 [2023-11-23 21:12:12,895 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:12:12,895 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:12:12,963 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:12:12,970 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;@1539637d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:12:12,970 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:12:12,978 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) [2023-11-23 21:12:12,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 21:12:12,989 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:12,990 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:12,990 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:12,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:12,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1922038645, now seen corresponding path program 1 times [2023-11-23 21:12:13,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:13,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577543610] [2023-11-23 21:12:13,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:13,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:14,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:14,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:14,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577543610] [2023-11-23 21:12:14,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577543610] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:14,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:14,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:12:14,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082915275] [2023-11-23 21:12:14,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:14,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:12:14,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:14,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:12:14,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:14,147 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) [2023-11-23 21:12:17,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:17,041 INFO L93 Difference]: Finished difference Result 1844 states and 2741 transitions. [2023-11-23 21:12:17,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:12:17,043 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 [2023-11-23 21:12:17,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:17,080 INFO L225 Difference]: With dead ends: 1844 [2023-11-23 21:12:17,081 INFO L226 Difference]: Without dead ends: 1213 [2023-11-23 21:12:17,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:17,103 INFO L413 NwaCegarLoop]: 800 mSDtfsCounter, 866 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s 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, 2.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:17,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [866 Valid, 1591 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-23 21:12:17,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2023-11-23 21:12:17,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1213. [2023-11-23 21:12:17,294 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) [2023-11-23 21:12:17,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1747 transitions. [2023-11-23 21:12:17,311 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1747 transitions. Word has length 15 [2023-11-23 21:12:17,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:17,312 INFO L495 AbstractCegarLoop]: Abstraction has 1213 states and 1747 transitions. [2023-11-23 21:12:17,312 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) [2023-11-23 21:12:17,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1747 transitions. [2023-11-23 21:12:17,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-23 21:12:17,315 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:17,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:12:17,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:12:17,316 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:17,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:17,316 INFO L85 PathProgramCache]: Analyzing trace with hash 414281674, now seen corresponding path program 1 times [2023-11-23 21:12:17,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:17,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861113033] [2023-11-23 21:12:17,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:17,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:12:17,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:17,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861113033] [2023-11-23 21:12:17,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861113033] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:17,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:17,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:12:17,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731756725] [2023-11-23 21:12:17,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:17,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:12:17,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:17,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:12:17,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:17,996 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) [2023-11-23 21:12:19,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:19,277 INFO L93 Difference]: Finished difference Result 2424 states and 3491 transitions. [2023-11-23 21:12:19,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:12:19,279 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 [2023-11-23 21:12:19,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:19,293 INFO L225 Difference]: With dead ends: 2424 [2023-11-23 21:12:19,294 INFO L226 Difference]: Without dead ends: 1212 [2023-11-23 21:12:19,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:19,307 INFO L413 NwaCegarLoop]: 791 mSDtfsCounter, 882 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s 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, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:19,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [882 Valid, 791 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 21:12:19,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2023-11-23 21:12:19,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 1212. [2023-11-23 21:12:19,418 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) [2023-11-23 21:12:19,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1743 transitions. [2023-11-23 21:12:19,431 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1743 transitions. Word has length 18 [2023-11-23 21:12:19,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:19,432 INFO L495 AbstractCegarLoop]: Abstraction has 1212 states and 1743 transitions. [2023-11-23 21:12:19,432 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) [2023-11-23 21:12:19,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1743 transitions. [2023-11-23 21:12:19,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-23 21:12:19,435 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:19,435 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] [2023-11-23 21:12:19,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:12:19,436 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:19,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:19,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1976125810, now seen corresponding path program 1 times [2023-11-23 21:12:19,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:19,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937340921] [2023-11-23 21:12:19,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:19,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:20,430 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-23 21:12:20,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:20,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937340921] [2023-11-23 21:12:20,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937340921] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:20,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:20,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:12:20,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958037936] [2023-11-23 21:12:20,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:20,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:12:20,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:20,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:12:20,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:12:20,435 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) [2023-11-23 21:12:25,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:25,315 INFO L93 Difference]: Finished difference Result 2423 states and 3553 transitions. [2023-11-23 21:12:25,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:12:25,316 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 [2023-11-23 21:12:25,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:25,340 INFO L225 Difference]: With dead ends: 2423 [2023-11-23 21:12:25,340 INFO L226 Difference]: Without dead ends: 2416 [2023-11-23 21:12:25,343 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 [2023-11-23 21:12:25,344 INFO L413 NwaCegarLoop]: 862 mSDtfsCounter, 857 mSDsluCounter, 1653 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 2515 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:25,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [857 Valid, 2515 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-11-23 21:12:25,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2023-11-23 21:12:25,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2408. [2023-11-23 21:12:25,521 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) [2023-11-23 21:12:25,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 3535 transitions. [2023-11-23 21:12:25,544 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 3535 transitions. Word has length 46 [2023-11-23 21:12:25,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:25,545 INFO L495 AbstractCegarLoop]: Abstraction has 2408 states and 3535 transitions. [2023-11-23 21:12:25,545 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) [2023-11-23 21:12:25,545 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 3535 transitions. [2023-11-23 21:12:25,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-23 21:12:25,599 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:25,600 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] [2023-11-23 21:12:25,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:12:25,600 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:25,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:25,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1688108695, now seen corresponding path program 1 times [2023-11-23 21:12:25,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:25,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152317182] [2023-11-23 21:12:25,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:25,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:26,162 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2023-11-23 21:12:26,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:26,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152317182] [2023-11-23 21:12:26,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152317182] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:26,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:26,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:12:26,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819968289] [2023-11-23 21:12:26,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:26,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:12:26,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:26,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:12:26,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:26,165 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) [2023-11-23 21:12:29,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:29,327 INFO L93 Difference]: Finished difference Result 3687 states and 5401 transitions. [2023-11-23 21:12:29,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:12:29,328 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 [2023-11-23 21:12:29,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:29,340 INFO L225 Difference]: With dead ends: 3687 [2023-11-23 21:12:29,341 INFO L226 Difference]: Without dead ends: 1280 [2023-11-23 21:12:29,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:29,355 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, 3.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:29,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 1503 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-23 21:12:29,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2023-11-23 21:12:29,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1264. [2023-11-23 21:12:29,434 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) [2023-11-23 21:12:29,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 1849 transitions. [2023-11-23 21:12:29,445 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 1849 transitions. Word has length 167 [2023-11-23 21:12:29,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:29,446 INFO L495 AbstractCegarLoop]: Abstraction has 1264 states and 1849 transitions. [2023-11-23 21:12:29,446 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) [2023-11-23 21:12:29,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 1849 transitions. [2023-11-23 21:12:29,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-23 21:12:29,454 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:29,455 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] [2023-11-23 21:12:29,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:12:29,455 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:29,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:29,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1138974798, now seen corresponding path program 1 times [2023-11-23 21:12:29,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:29,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636677369] [2023-11-23 21:12:29,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:29,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:30,027 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2023-11-23 21:12:30,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:30,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636677369] [2023-11-23 21:12:30,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636677369] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:30,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:30,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:12:30,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045736015] [2023-11-23 21:12:30,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:30,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:12:30,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:30,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:12:30,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:30,032 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) [2023-11-23 21:12:33,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:33,459 INFO L93 Difference]: Finished difference Result 3593 states and 5249 transitions. [2023-11-23 21:12:33,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:12:33,460 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 [2023-11-23 21:12:33,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:33,480 INFO L225 Difference]: With dead ends: 3593 [2023-11-23 21:12:33,481 INFO L226 Difference]: Without dead ends: 2343 [2023-11-23 21:12:33,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:12:33,489 INFO L413 NwaCegarLoop]: 783 mSDtfsCounter, 753 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s 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, 3.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:33,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [753 Valid, 1447 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-23 21:12:33,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2343 states. [2023-11-23 21:12:33,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2343 to 2327. [2023-11-23 21:12:33,642 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) [2023-11-23 21:12:33,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2327 states to 2327 states and 3345 transitions. [2023-11-23 21:12:33,655 INFO L78 Accepts]: Start accepts. Automaton has 2327 states and 3345 transitions. Word has length 167 [2023-11-23 21:12:33,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:33,656 INFO L495 AbstractCegarLoop]: Abstraction has 2327 states and 3345 transitions. [2023-11-23 21:12:33,659 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) [2023-11-23 21:12:33,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2327 states and 3345 transitions. [2023-11-23 21:12:33,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-23 21:12:33,666 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:33,667 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] [2023-11-23 21:12:33,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:12:33,667 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:33,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:33,668 INFO L85 PathProgramCache]: Analyzing trace with hash 162752121, now seen corresponding path program 1 times [2023-11-23 21:12:33,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:33,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331643115] [2023-11-23 21:12:33,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:33,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:33,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:34,875 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2023-11-23 21:12:34,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:34,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331643115] [2023-11-23 21:12:34,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331643115] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:12:34,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:12:34,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:12:34,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776220918] [2023-11-23 21:12:34,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:12:34,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:12:34,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:12:34,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:12:34,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:12:34,879 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) [2023-11-23 21:12:39,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:12:39,429 INFO L93 Difference]: Finished difference Result 4664 states and 6882 transitions. [2023-11-23 21:12:39,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:12:39,430 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 [2023-11-23 21:12:39,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:12:39,451 INFO L225 Difference]: With dead ends: 4664 [2023-11-23 21:12:39,452 INFO L226 Difference]: Without dead ends: 2351 [2023-11-23 21:12:39,462 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 [2023-11-23 21:12:39,464 INFO L413 NwaCegarLoop]: 791 mSDtfsCounter, 2 mSDsluCounter, 2368 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s 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, 4.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:12:39,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 3159 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-11-23 21:12:39,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2023-11-23 21:12:39,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 2347. [2023-11-23 21:12:39,616 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) [2023-11-23 21:12:39,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 3403 transitions. [2023-11-23 21:12:39,628 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 3403 transitions. Word has length 167 [2023-11-23 21:12:39,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:12:39,631 INFO L495 AbstractCegarLoop]: Abstraction has 2347 states and 3403 transitions. [2023-11-23 21:12:39,632 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) [2023-11-23 21:12:39,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 3403 transitions. [2023-11-23 21:12:39,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-11-23 21:12:39,642 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:12:39,642 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 5, 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] [2023-11-23 21:12:39,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:12:39,643 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:12:39,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:12:39,643 INFO L85 PathProgramCache]: Analyzing trace with hash -476090858, now seen corresponding path program 1 times [2023-11-23 21:12:39,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:12:39,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713580762] [2023-11-23 21:12:39,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:39,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:12:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2023-11-23 21:12:42,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:12:42,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713580762] [2023-11-23 21:12:42,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713580762] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:12:42,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163750522] [2023-11-23 21:12:42,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:12:42,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:12:42,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d71565-059f-4def-b426-19786c7792a8/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:12:42,316 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d71565-059f-4def-b426-19786c7792a8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:12:42,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68d71565-059f-4def-b426-19786c7792a8/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:12:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:12:43,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 4737 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-23 21:12:43,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:12:44,209 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2023-11-23 21:12:44,209 INFO L327 TraceCheckSpWp]: Computing backward predicates...