./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--nfc--st21nfca--st21nfca_i2c.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_8328de04-7086-48cc-a8ae-018fcc9e9ba4/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8328de04-7086-48cc-a8ae-018fcc9e9ba4/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_8328de04-7086-48cc-a8ae-018fcc9e9ba4/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8328de04-7086-48cc-a8ae-018fcc9e9ba4/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--nfc--st21nfca--st21nfca_i2c.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8328de04-7086-48cc-a8ae-018fcc9e9ba4/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_8328de04-7086-48cc-a8ae-018fcc9e9ba4/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 0b6cec80466d26e7f9fcd66257be2e9ddc0be03c06ed1a001e454a4fe37aa1e9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:18:19,375 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:18:19,477 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8328de04-7086-48cc-a8ae-018fcc9e9ba4/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:18:19,483 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:18:19,484 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:18:19,510 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:18:19,510 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:18:19,511 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:18:19,512 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:18:19,512 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:18:19,513 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:18:19,514 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:18:19,514 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:18:19,515 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:18:19,515 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:18:19,516 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:18:19,517 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:18:19,517 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:18:19,518 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:18:19,518 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:18:19,519 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:18:19,520 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:18:19,521 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:18:19,521 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:18:19,522 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:18:19,522 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:18:19,523 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:18:19,523 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:18:19,524 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:18:19,524 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:18:19,524 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:18:19,525 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:18:19,526 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:18:19,526 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:18:19,526 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:18:19,527 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:18:19,527 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:18:19,528 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:18:19,528 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:18:19,529 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:18:19,529 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:18:19,530 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:18:19,531 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:18:19,531 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:18:19,531 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_8328de04-7086-48cc-a8ae-018fcc9e9ba4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8328de04-7086-48cc-a8ae-018fcc9e9ba4/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b6cec80466d26e7f9fcd66257be2e9ddc0be03c06ed1a001e454a4fe37aa1e9 [2023-11-23 21:18:19,822 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:18:19,854 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:18:19,857 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:18:19,860 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:18:19,860 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:18:19,861 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8328de04-7086-48cc-a8ae-018fcc9e9ba4/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--nfc--st21nfca--st21nfca_i2c.ko-entry_point.cil.out.i [2023-11-23 21:18:22,899 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:18:23,452 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:18:23,452 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8328de04-7086-48cc-a8ae-018fcc9e9ba4/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--nfc--st21nfca--st21nfca_i2c.ko-entry_point.cil.out.i [2023-11-23 21:18:23,496 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8328de04-7086-48cc-a8ae-018fcc9e9ba4/bin/utaipan-verify-mE87zJ7Ire/data/9a81354b6/995bf5ef36cd4160b02a3b1f3bfc57b8/FLAG2a305f639 [2023-11-23 21:18:23,515 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8328de04-7086-48cc-a8ae-018fcc9e9ba4/bin/utaipan-verify-mE87zJ7Ire/data/9a81354b6/995bf5ef36cd4160b02a3b1f3bfc57b8 [2023-11-23 21:18:23,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:18:23,524 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:18:23,528 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:18:23,528 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:18:23,533 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:18:23,534 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:18:23" (1/1) ... [2023-11-23 21:18:23,535 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f57b843 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:23, skipping insertion in model container [2023-11-23 21:18:23,535 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:18:23" (1/1) ... [2023-11-23 21:18:23,650 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:18:24,133 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [2715] [2023-11-23 21:18:24,134 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [2716-2717] [2023-11-23 21:18:24,245 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_8328de04-7086-48cc-a8ae-018fcc9e9ba4/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--nfc--st21nfca--st21nfca_i2c.ko-entry_point.cil.out.i[78841,78854] [2023-11-23 21:18:24,923 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:18:24,961 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:18:25,058 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [2715] [2023-11-23 21:18:25,058 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [2716-2717] [2023-11-23 21:18:25,066 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_8328de04-7086-48cc-a8ae-018fcc9e9ba4/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--nfc--st21nfca--st21nfca_i2c.ko-entry_point.cil.out.i[78841,78854] [2023-11-23 21:18:25,281 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:18:25,366 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:18:25,380 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:25 WrapperNode [2023-11-23 21:18:25,381 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:18:25,382 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:18:25,382 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:18:25,382 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:18:25,390 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:25" (1/1) ... [2023-11-23 21:18:25,465 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:25" (1/1) ... [2023-11-23 21:18:25,588 INFO L138 Inliner]: procedures = 143, calls = 678, calls flagged for inlining = 57, calls inlined = 53, statements flattened = 2001 [2023-11-23 21:18:25,588 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:18:25,589 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:18:25,589 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:18:25,589 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:18:25,599 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:25" (1/1) ... [2023-11-23 21:18:25,599 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:25" (1/1) ... [2023-11-23 21:18:25,623 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:25" (1/1) ... [2023-11-23 21:18:25,623 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:25" (1/1) ... [2023-11-23 21:18:25,714 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:25" (1/1) ... [2023-11-23 21:18:25,732 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:25" (1/1) ... [2023-11-23 21:18:25,749 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:25" (1/1) ... [2023-11-23 21:18:25,762 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:25" (1/1) ... [2023-11-23 21:18:25,792 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:18:25,793 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:18:25,794 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:18:25,794 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:18:25,795 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:25" (1/1) ... [2023-11-23 21:18:25,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:18:25,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8328de04-7086-48cc-a8ae-018fcc9e9ba4/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:18:25,824 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8328de04-7086-48cc-a8ae-018fcc9e9ba4/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:18:25,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8328de04-7086-48cc-a8ae-018fcc9e9ba4/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:18:25,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 21:18:25,867 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2023-11-23 21:18:25,869 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2023-11-23 21:18:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure devm_request_threaded_irq [2023-11-23 21:18:25,870 INFO L138 BoogieDeclarations]: Found implementation of procedure devm_request_threaded_irq [2023-11-23 21:18:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-23 21:18:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_skb [2023-11-23 21:18:25,870 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_skb [2023-11-23 21:18:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-23 21:18:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 21:18:25,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 21:18:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:18:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure skb_push [2023-11-23 21:18:25,871 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_push [2023-11-23 21:18:25,872 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_get_clientdata [2023-11-23 21:18:25,872 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_get_clientdata [2023-11-23 21:18:25,872 INFO L130 BoogieDeclarations]: Found specification of procedure reg_check_1 [2023-11-23 21:18:25,873 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_check_1 [2023-11-23 21:18:25,873 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 21:18:25,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 21:18:25,873 INFO L130 BoogieDeclarations]: Found specification of procedure skb_trim [2023-11-23 21:18:25,874 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_trim [2023-11-23 21:18:25,875 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2023-11-23 21:18:25,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2023-11-23 21:18:25,875 INFO L130 BoogieDeclarations]: Found specification of procedure print_hex_dump [2023-11-23 21:18:25,876 INFO L138 BoogieDeclarations]: Found implementation of procedure print_hex_dump [2023-11-23 21:18:25,876 INFO L130 BoogieDeclarations]: Found specification of procedure usleep_range [2023-11-23 21:18:25,876 INFO L138 BoogieDeclarations]: Found implementation of procedure usleep_range [2023-11-23 21:18:25,876 INFO L130 BoogieDeclarations]: Found specification of procedure devm_gpio_request [2023-11-23 21:18:25,876 INFO L138 BoogieDeclarations]: Found implementation of procedure devm_gpio_request [2023-11-23 21:18:25,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:18:25,877 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-23 21:18:25,878 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-23 21:18:25,878 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 21:18:25,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 21:18:25,879 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_dev_dbg [2023-11-23 21:18:25,879 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_dev_dbg [2023-11-23 21:18:25,879 INFO L130 BoogieDeclarations]: Found specification of procedure skb_pull [2023-11-23 21:18:25,879 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_pull [2023-11-23 21:18:25,879 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-23 21:18:25,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-23 21:18:25,880 INFO L130 BoogieDeclarations]: Found specification of procedure gpio_set_value [2023-11-23 21:18:25,880 INFO L138 BoogieDeclarations]: Found implementation of procedure gpio_set_value [2023-11-23 21:18:25,880 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_irq_1 [2023-11-23 21:18:25,880 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_irq_1 [2023-11-23 21:18:25,880 INFO L130 BoogieDeclarations]: Found specification of procedure st21nfca_hci_irq_thread_fn [2023-11-23 21:18:25,881 INFO L138 BoogieDeclarations]: Found implementation of procedure st21nfca_hci_irq_thread_fn [2023-11-23 21:18:25,881 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:18:25,881 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:18:25,881 INFO L130 BoogieDeclarations]: Found specification of procedure gpio_to_desc [2023-11-23 21:18:25,881 INFO L138 BoogieDeclarations]: Found implementation of procedure gpio_to_desc [2023-11-23 21:18:25,881 INFO L130 BoogieDeclarations]: Found specification of procedure nfc_hci_recv_frame [2023-11-23 21:18:25,882 INFO L138 BoogieDeclarations]: Found implementation of procedure nfc_hci_recv_frame [2023-11-23 21:18:25,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:18:25,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:18:25,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:18:25,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:18:25,883 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_master_send [2023-11-23 21:18:25,883 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_master_send [2023-11-23 21:18:25,884 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2023-11-23 21:18:25,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2023-11-23 21:18:25,885 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_2 [2023-11-23 21:18:25,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_2 [2023-11-23 21:18:25,885 INFO L130 BoogieDeclarations]: Found specification of procedure crc_ccitt [2023-11-23 21:18:25,885 INFO L138 BoogieDeclarations]: Found implementation of procedure crc_ccitt [2023-11-23 21:18:25,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:18:25,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:18:25,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:18:25,886 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-23 21:18:25,886 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-23 21:18:25,887 INFO L130 BoogieDeclarations]: Found specification of procedure st21nfca_hci_i2c_disable [2023-11-23 21:18:25,887 INFO L138 BoogieDeclarations]: Found implementation of procedure st21nfca_hci_i2c_disable [2023-11-23 21:18:25,887 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-23 21:18:25,887 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-23 21:18:25,887 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2023-11-23 21:18:25,887 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2023-11-23 21:18:25,888 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_master_recv [2023-11-23 21:18:25,888 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_master_recv [2023-11-23 21:18:25,888 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2023-11-23 21:18:25,888 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2023-11-23 21:18:25,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:18:25,888 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-23 21:18:25,889 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-23 21:18:25,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-23 21:18:25,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:18:25,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:18:26,375 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:18:26,378 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:18:26,632 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 21:18:28,665 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:18:29,113 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:18:29,113 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:18:29,115 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:18:29 BoogieIcfgContainer [2023-11-23 21:18:29,115 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:18:29,118 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:18:29,118 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:18:29,121 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:18:29,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:18:23" (1/3) ... [2023-11-23 21:18:29,123 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20eae131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:18:29, skipping insertion in model container [2023-11-23 21:18:29,123 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:25" (2/3) ... [2023-11-23 21:18:29,123 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20eae131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:18:29, skipping insertion in model container [2023-11-23 21:18:29,123 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:18:29" (3/3) ... [2023-11-23 21:18:29,125 INFO L112 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--nfc--st21nfca--st21nfca_i2c.ko-entry_point.cil.out.i [2023-11-23 21:18:29,150 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:18:29,150 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:18:29,218 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:18:29,225 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;@6e783a8f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:18:29,225 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:18:29,233 INFO L276 IsEmpty]: Start isEmpty. Operand has 454 states, 301 states have (on average 1.3820598006644518) internal successors, (416), 313 states have internal predecessors, (416), 117 states have call successors, (117), 35 states have call predecessors, (117), 34 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2023-11-23 21:18:29,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-23 21:18:29,253 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:29,254 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:18:29,254 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:29,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:29,260 INFO L85 PathProgramCache]: Analyzing trace with hash 2007517941, now seen corresponding path program 1 times [2023-11-23 21:18:29,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:29,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185670848] [2023-11-23 21:18:29,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:29,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:29,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:30,279 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-23 21:18:30,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:30,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185670848] [2023-11-23 21:18:30,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185670848] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:30,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:30,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:18:30,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277742593] [2023-11-23 21:18:30,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:30,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:18:30,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:30,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:18:30,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:18:30,336 INFO L87 Difference]: Start difference. First operand has 454 states, 301 states have (on average 1.3820598006644518) internal successors, (416), 313 states have internal predecessors, (416), 117 states have call successors, (117), 35 states have call predecessors, (117), 34 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 21:18:32,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:32,805 INFO L93 Difference]: Finished difference Result 1348 states and 1936 transitions. [2023-11-23 21:18:32,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:18:32,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 65 [2023-11-23 21:18:32,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:32,829 INFO L225 Difference]: With dead ends: 1348 [2023-11-23 21:18:32,830 INFO L226 Difference]: Without dead ends: 883 [2023-11-23 21:18:32,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:18:32,841 INFO L413 NwaCegarLoop]: 563 mSDtfsCounter, 634 mSDsluCounter, 1663 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 2226 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:32,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [638 Valid, 2226 Invalid, 325 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-23 21:18:32,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2023-11-23 21:18:32,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 868. [2023-11-23 21:18:32,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 590 states have (on average 1.352542372881356) internal successors, (798), 597 states have internal predecessors, (798), 211 states have call successors, (211), 67 states have call predecessors, (211), 66 states have return successors, (210), 206 states have call predecessors, (210), 210 states have call successors, (210) [2023-11-23 21:18:33,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1219 transitions. [2023-11-23 21:18:33,012 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1219 transitions. Word has length 65 [2023-11-23 21:18:33,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:33,014 INFO L495 AbstractCegarLoop]: Abstraction has 868 states and 1219 transitions. [2023-11-23 21:18:33,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 21:18:33,015 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1219 transitions. [2023-11-23 21:18:33,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-23 21:18:33,033 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:33,034 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2023-11-23 21:18:33,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:18:33,034 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:33,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:33,035 INFO L85 PathProgramCache]: Analyzing trace with hash -119779149, now seen corresponding path program 1 times [2023-11-23 21:18:33,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:33,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477948119] [2023-11-23 21:18:33,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:33,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:33,346 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-23 21:18:33,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:33,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477948119] [2023-11-23 21:18:33,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477948119] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:33,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:33,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:18:33,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680421725] [2023-11-23 21:18:33,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:33,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:18:33,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:33,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:18:33,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:18:33,351 INFO L87 Difference]: Start difference. First operand 868 states and 1219 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:18:34,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:34,397 INFO L93 Difference]: Finished difference Result 2299 states and 3209 transitions. [2023-11-23 21:18:34,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:18:34,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 66 [2023-11-23 21:18:34,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:34,409 INFO L225 Difference]: With dead ends: 2299 [2023-11-23 21:18:34,410 INFO L226 Difference]: Without dead ends: 1442 [2023-11-23 21:18:34,412 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 21:18:34,414 INFO L413 NwaCegarLoop]: 547 mSDtfsCounter, 405 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:34,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 1074 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 21:18:34,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2023-11-23 21:18:34,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 1439. [2023-11-23 21:18:34,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 984 states have (on average 1.3526422764227641) internal successors, (1331), 995 states have internal predecessors, (1331), 336 states have call successors, (336), 119 states have call predecessors, (336), 118 states have return successors, (335), 327 states have call predecessors, (335), 335 states have call successors, (335) [2023-11-23 21:18:34,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 2002 transitions. [2023-11-23 21:18:34,519 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 2002 transitions. Word has length 66 [2023-11-23 21:18:34,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:34,519 INFO L495 AbstractCegarLoop]: Abstraction has 1439 states and 2002 transitions. [2023-11-23 21:18:34,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:18:34,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 2002 transitions. [2023-11-23 21:18:34,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-23 21:18:34,523 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:34,523 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:18:34,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:18:34,524 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:34,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:34,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1293378939, now seen corresponding path program 1 times [2023-11-23 21:18:34,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:34,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789545799] [2023-11-23 21:18:34,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:34,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:34,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:34,988 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-23 21:18:34,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:34,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789545799] [2023-11-23 21:18:34,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789545799] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:34,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:34,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:18:34,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469720166] [2023-11-23 21:18:34,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:34,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:18:34,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:34,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:18:34,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:18:34,992 INFO L87 Difference]: Start difference. First operand 1439 states and 2002 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 21:18:36,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:36,739 INFO L93 Difference]: Finished difference Result 3204 states and 4434 transitions. [2023-11-23 21:18:36,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:18:36,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 66 [2023-11-23 21:18:36,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:36,756 INFO L225 Difference]: With dead ends: 3204 [2023-11-23 21:18:36,757 INFO L226 Difference]: Without dead ends: 2189 [2023-11-23 21:18:36,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:18:36,762 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 610 mSDsluCounter, 1615 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 2164 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:36,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [614 Valid, 2164 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-23 21:18:36,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2023-11-23 21:18:36,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2154. [2023-11-23 21:18:36,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2154 states, 1478 states have (on average 1.3518267929634642) internal successors, (1998), 1488 states have internal predecessors, (1998), 498 states have call successors, (498), 178 states have call predecessors, (498), 177 states have return successors, (497), 491 states have call predecessors, (497), 497 states have call successors, (497) [2023-11-23 21:18:36,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2154 states to 2154 states and 2993 transitions. [2023-11-23 21:18:36,901 INFO L78 Accepts]: Start accepts. Automaton has 2154 states and 2993 transitions. Word has length 66 [2023-11-23 21:18:36,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:36,901 INFO L495 AbstractCegarLoop]: Abstraction has 2154 states and 2993 transitions. [2023-11-23 21:18:36,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 21:18:36,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2154 states and 2993 transitions. [2023-11-23 21:18:36,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-23 21:18:36,905 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:36,905 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:18:36,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:18:36,906 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:36,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:36,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1579265175, now seen corresponding path program 1 times [2023-11-23 21:18:36,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:36,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623921963] [2023-11-23 21:18:36,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:36,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:37,343 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-23 21:18:37,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:37,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623921963] [2023-11-23 21:18:37,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623921963] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:37,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:37,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:18:37,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557422672] [2023-11-23 21:18:37,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:37,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:18:37,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:37,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:18:37,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:18:37,347 INFO L87 Difference]: Start difference. First operand 2154 states and 2993 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 21:18:39,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:39,608 INFO L93 Difference]: Finished difference Result 6494 states and 9035 transitions. [2023-11-23 21:18:39,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:18:39,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 68 [2023-11-23 21:18:39,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:39,640 INFO L225 Difference]: With dead ends: 6494 [2023-11-23 21:18:39,640 INFO L226 Difference]: Without dead ends: 4357 [2023-11-23 21:18:39,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:18:39,650 INFO L413 NwaCegarLoop]: 544 mSDtfsCounter, 613 mSDsluCounter, 1607 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 2151 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:39,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 2151 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-23 21:18:39,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4357 states. [2023-11-23 21:18:39,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4357 to 4294. [2023-11-23 21:18:39,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4294 states, 2945 states have (on average 1.3528013582342955) internal successors, (3984), 2989 states have internal predecessors, (3984), 989 states have call successors, (989), 360 states have call predecessors, (989), 359 states have return successors, (988), 952 states have call predecessors, (988), 988 states have call successors, (988) [2023-11-23 21:18:40,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4294 states to 4294 states and 5961 transitions. [2023-11-23 21:18:40,040 INFO L78 Accepts]: Start accepts. Automaton has 4294 states and 5961 transitions. Word has length 68 [2023-11-23 21:18:40,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:40,042 INFO L495 AbstractCegarLoop]: Abstraction has 4294 states and 5961 transitions. [2023-11-23 21:18:40,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 21:18:40,042 INFO L276 IsEmpty]: Start isEmpty. Operand 4294 states and 5961 transitions. [2023-11-23 21:18:40,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-23 21:18:40,046 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:40,046 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:18:40,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:18:40,047 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:40,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:40,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1938829566, now seen corresponding path program 1 times [2023-11-23 21:18:40,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:40,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025851200] [2023-11-23 21:18:40,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:40,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:40,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:40,359 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-23 21:18:40,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:40,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025851200] [2023-11-23 21:18:40,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025851200] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:40,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:40,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:18:40,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441635807] [2023-11-23 21:18:40,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:40,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:18:40,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:40,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:18:40,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:18:40,363 INFO L87 Difference]: Start difference. First operand 4294 states and 5961 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 21:18:42,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:42,095 INFO L93 Difference]: Finished difference Result 7433 states and 10239 transitions. [2023-11-23 21:18:42,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:18:42,096 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 69 [2023-11-23 21:18:42,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:42,127 INFO L225 Difference]: With dead ends: 7433 [2023-11-23 21:18:42,127 INFO L226 Difference]: Without dead ends: 4390 [2023-11-23 21:18:42,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:18:42,139 INFO L413 NwaCegarLoop]: 547 mSDtfsCounter, 607 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:42,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 1626 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-23 21:18:42,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4390 states. [2023-11-23 21:18:42,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4390 to 4318. [2023-11-23 21:18:42,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4318 states, 2969 states have (on average 1.3499494779386998) internal successors, (4008), 3007 states have internal predecessors, (4008), 983 states have call successors, (983), 366 states have call predecessors, (983), 365 states have return successors, (982), 952 states have call predecessors, (982), 982 states have call successors, (982) [2023-11-23 21:18:42,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4318 states to 4318 states and 5973 transitions. [2023-11-23 21:18:42,499 INFO L78 Accepts]: Start accepts. Automaton has 4318 states and 5973 transitions. Word has length 69 [2023-11-23 21:18:42,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:42,500 INFO L495 AbstractCegarLoop]: Abstraction has 4318 states and 5973 transitions. [2023-11-23 21:18:42,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 21:18:42,500 INFO L276 IsEmpty]: Start isEmpty. Operand 4318 states and 5973 transitions. [2023-11-23 21:18:42,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-23 21:18:42,504 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:42,505 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:18:42,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:18:42,505 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:42,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:42,506 INFO L85 PathProgramCache]: Analyzing trace with hash 2072690386, now seen corresponding path program 1 times [2023-11-23 21:18:42,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:42,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341421413] [2023-11-23 21:18:42,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:42,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:42,834 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-23 21:18:42,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:42,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341421413] [2023-11-23 21:18:42,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341421413] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:42,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:42,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:18:42,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642075664] [2023-11-23 21:18:42,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:42,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:18:42,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:42,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:18:42,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:18:42,839 INFO L87 Difference]: Start difference. First operand 4318 states and 5973 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 21:18:45,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:45,070 INFO L93 Difference]: Finished difference Result 7882 states and 10849 transitions. [2023-11-23 21:18:45,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:18:45,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 67 [2023-11-23 21:18:45,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:45,102 INFO L225 Difference]: With dead ends: 7882 [2023-11-23 21:18:45,102 INFO L226 Difference]: Without dead ends: 4401 [2023-11-23 21:18:45,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:18:45,115 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 608 mSDsluCounter, 1615 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 2164 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:45,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 2164 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-23 21:18:45,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2023-11-23 21:18:45,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 4334. [2023-11-23 21:18:45,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4334 states, 2985 states have (on average 1.3480737018425462) internal successors, (4024), 3019 states have internal predecessors, (4024), 979 states have call successors, (979), 370 states have call predecessors, (979), 369 states have return successors, (978), 952 states have call predecessors, (978), 978 states have call successors, (978) [2023-11-23 21:18:45,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4334 states to 4334 states and 5981 transitions. [2023-11-23 21:18:45,432 INFO L78 Accepts]: Start accepts. Automaton has 4334 states and 5981 transitions. Word has length 67 [2023-11-23 21:18:45,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:45,433 INFO L495 AbstractCegarLoop]: Abstraction has 4334 states and 5981 transitions. [2023-11-23 21:18:45,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 21:18:45,434 INFO L276 IsEmpty]: Start isEmpty. Operand 4334 states and 5981 transitions. [2023-11-23 21:18:45,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-23 21:18:45,437 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:45,437 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:18:45,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:18:45,438 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:45,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:45,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1904325496, now seen corresponding path program 1 times [2023-11-23 21:18:45,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:45,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814352671] [2023-11-23 21:18:45,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:45,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:45,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:45,815 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-23 21:18:45,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:45,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814352671] [2023-11-23 21:18:45,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814352671] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:45,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:45,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:18:45,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515610536] [2023-11-23 21:18:45,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:45,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:18:45,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:45,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:18:45,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:18:45,819 INFO L87 Difference]: Start difference. First operand 4334 states and 5981 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 21:18:46,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:18:48,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:48,527 INFO L93 Difference]: Finished difference Result 7854 states and 10785 transitions. [2023-11-23 21:18:48,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:18:48,528 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 68 [2023-11-23 21:18:48,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:48,558 INFO L225 Difference]: With dead ends: 7854 [2023-11-23 21:18:48,558 INFO L226 Difference]: Without dead ends: 4353 [2023-11-23 21:18:48,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:18:48,572 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 606 mSDsluCounter, 1615 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 2164 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:48,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [610 Valid, 2164 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-23 21:18:48,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4353 states. [2023-11-23 21:18:48,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4353 to 4298. [2023-11-23 21:18:48,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4298 states, 2957 states have (on average 1.3446060196144742) internal successors, (3976), 2987 states have internal predecessors, (3976), 971 states have call successors, (971), 370 states have call predecessors, (971), 369 states have return successors, (970), 948 states have call predecessors, (970), 970 states have call successors, (970) [2023-11-23 21:18:48,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4298 states to 4298 states and 5917 transitions. [2023-11-23 21:18:48,941 INFO L78 Accepts]: Start accepts. Automaton has 4298 states and 5917 transitions. Word has length 68 [2023-11-23 21:18:48,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:48,942 INFO L495 AbstractCegarLoop]: Abstraction has 4298 states and 5917 transitions. [2023-11-23 21:18:48,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 21:18:48,942 INFO L276 IsEmpty]: Start isEmpty. Operand 4298 states and 5917 transitions. [2023-11-23 21:18:48,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-23 21:18:48,951 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:48,951 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:18:48,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:18:48,951 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:48,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:48,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1643207828, now seen corresponding path program 1 times [2023-11-23 21:18:48,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:48,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676934856] [2023-11-23 21:18:48,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:48,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-23 21:18:49,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:49,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676934856] [2023-11-23 21:18:49,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676934856] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:49,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:49,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:18:49,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969759960] [2023-11-23 21:18:49,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:49,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:18:49,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:49,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:18:49,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:18:49,233 INFO L87 Difference]: Start difference. First operand 4298 states and 5917 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 21:18:51,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:51,468 INFO L93 Difference]: Finished difference Result 7457 states and 10179 transitions. [2023-11-23 21:18:51,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:18:51,469 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2023-11-23 21:18:51,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:51,501 INFO L225 Difference]: With dead ends: 7457 [2023-11-23 21:18:51,501 INFO L226 Difference]: Without dead ends: 4394 [2023-11-23 21:18:51,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:18:51,513 INFO L413 NwaCegarLoop]: 547 mSDtfsCounter, 605 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:51,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 1626 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-23 21:18:51,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4394 states. [2023-11-23 21:18:51,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4394 to 4322. [2023-11-23 21:18:51,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4322 states, 2981 states have (on average 1.3418316001341832) internal successors, (4000), 3005 states have internal predecessors, (4000), 965 states have call successors, (965), 376 states have call predecessors, (965), 375 states have return successors, (964), 948 states have call predecessors, (964), 964 states have call successors, (964) [2023-11-23 21:18:51,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4322 states to 4322 states and 5929 transitions. [2023-11-23 21:18:51,851 INFO L78 Accepts]: Start accepts. Automaton has 4322 states and 5929 transitions. Word has length 70 [2023-11-23 21:18:51,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:51,852 INFO L495 AbstractCegarLoop]: Abstraction has 4322 states and 5929 transitions. [2023-11-23 21:18:51,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 21:18:51,853 INFO L276 IsEmpty]: Start isEmpty. Operand 4322 states and 5929 transitions. [2023-11-23 21:18:51,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-23 21:18:51,856 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:51,856 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:18:51,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:18:51,857 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:51,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:51,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1783314725, now seen corresponding path program 1 times [2023-11-23 21:18:51,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:51,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957407819] [2023-11-23 21:18:51,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:51,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:51,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-23 21:18:52,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:52,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957407819] [2023-11-23 21:18:52,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957407819] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:52,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:18:52,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:18:52,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136218335] [2023-11-23 21:18:52,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:52,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:18:52,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:52,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:18:52,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:18:52,138 INFO L87 Difference]: Start difference. First operand 4322 states and 5929 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 21:18:54,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:54,017 INFO L93 Difference]: Finished difference Result 7213 states and 9780 transitions. [2023-11-23 21:18:54,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:18:54,017 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 71 [2023-11-23 21:18:54,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:54,044 INFO L225 Difference]: With dead ends: 7213 [2023-11-23 21:18:54,044 INFO L226 Difference]: Without dead ends: 4120 [2023-11-23 21:18:54,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:18:54,056 INFO L413 NwaCegarLoop]: 547 mSDtfsCounter, 603 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 607 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:54,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [607 Valid, 1626 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-23 21:18:54,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4120 states. [2023-11-23 21:18:54,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4120 to 4066. [2023-11-23 21:18:54,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4066 states, 2802 states have (on average 1.3344039971448964) internal successors, (3739), 2820 states have internal predecessors, (3739), 896 states have call successors, (896), 368 states have call predecessors, (896), 367 states have return successors, (895), 885 states have call predecessors, (895), 895 states have call successors, (895) [2023-11-23 21:18:54,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4066 states to 4066 states and 5530 transitions. [2023-11-23 21:18:54,373 INFO L78 Accepts]: Start accepts. Automaton has 4066 states and 5530 transitions. Word has length 71 [2023-11-23 21:18:54,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:54,374 INFO L495 AbstractCegarLoop]: Abstraction has 4066 states and 5530 transitions. [2023-11-23 21:18:54,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 21:18:54,374 INFO L276 IsEmpty]: Start isEmpty. Operand 4066 states and 5530 transitions. [2023-11-23 21:18:54,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-23 21:18:54,378 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:54,379 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:18:54,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 21:18:54,379 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:54,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:54,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1510353762, now seen corresponding path program 1 times [2023-11-23 21:18:54,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:18:54,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163492315] [2023-11-23 21:18:54,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:54,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:18:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:54,832 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-23 21:18:54,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:18:54,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163492315] [2023-11-23 21:18:54,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163492315] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:18:54,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899881225] [2023-11-23 21:18:54,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:18:54,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:18:54,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8328de04-7086-48cc-a8ae-018fcc9e9ba4/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:18:54,840 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8328de04-7086-48cc-a8ae-018fcc9e9ba4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:18:54,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8328de04-7086-48cc-a8ae-018fcc9e9ba4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:18:55,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:18:55,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 1304 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:18:55,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:18:55,661 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-23 21:18:55,661 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:18:55,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899881225] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:18:55,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:18:55,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2023-11-23 21:18:55,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990943222] [2023-11-23 21:18:55,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:18:55,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:18:55,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:18:55,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:18:55,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:18:55,664 INFO L87 Difference]: Start difference. First operand 4066 states and 5530 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:18:59,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:59,170 INFO L93 Difference]: Finished difference Result 9736 states and 13259 transitions. [2023-11-23 21:18:59,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 21:18:59,171 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 78 [2023-11-23 21:18:59,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:59,200 INFO L225 Difference]: With dead ends: 9736 [2023-11-23 21:18:59,201 INFO L226 Difference]: Without dead ends: 6839 [2023-11-23 21:18:59,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2023-11-23 21:18:59,211 INFO L413 NwaCegarLoop]: 701 mSDtfsCounter, 646 mSDsluCounter, 3339 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 4040 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:59,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 4040 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-23 21:18:59,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6839 states. [2023-11-23 21:18:59,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6839 to 6716. [2023-11-23 21:18:59,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6716 states, 4641 states have (on average 1.3363499245852186) internal successors, (6202), 4687 states have internal predecessors, (6202), 1463 states have call successors, (1463), 604 states have call predecessors, (1463), 611 states have return successors, (1482), 1436 states have call predecessors, (1482), 1462 states have call successors, (1482) [2023-11-23 21:18:59,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6716 states to 6716 states and 9147 transitions. [2023-11-23 21:18:59,782 INFO L78 Accepts]: Start accepts. Automaton has 6716 states and 9147 transitions. Word has length 78 [2023-11-23 21:18:59,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:59,783 INFO L495 AbstractCegarLoop]: Abstraction has 6716 states and 9147 transitions. [2023-11-23 21:18:59,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:18:59,783 INFO L276 IsEmpty]: Start isEmpty. Operand 6716 states and 9147 transitions. [2023-11-23 21:18:59,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-23 21:18:59,789 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:59,789 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:18:59,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8328de04-7086-48cc-a8ae-018fcc9e9ba4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:19:00,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8328de04-7086-48cc-a8ae-018fcc9e9ba4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 21:19:00,006 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:00,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:00,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1921430899, now seen corresponding path program 1 times [2023-11-23 21:19:00,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:00,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170005714] [2023-11-23 21:19:00,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:00,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:00,444 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-23 21:19:00,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:00,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170005714] [2023-11-23 21:19:00,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170005714] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:19:00,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078490632] [2023-11-23 21:19:00,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:00,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:00,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8328de04-7086-48cc-a8ae-018fcc9e9ba4/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:19:00,447 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8328de04-7086-48cc-a8ae-018fcc9e9ba4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:19:00,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8328de04-7086-48cc-a8ae-018fcc9e9ba4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:19:01,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:01,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 1306 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:19:01,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:19:01,264 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-23 21:19:01,264 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:19:01,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078490632] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:01,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:19:01,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2023-11-23 21:19:01,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266946615] [2023-11-23 21:19:01,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:01,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:19:01,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:01,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:19:01,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:19:01,267 INFO L87 Difference]: Start difference. First operand 6716 states and 9147 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:19:05,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:05,031 INFO L93 Difference]: Finished difference Result 15080 states and 20533 transitions. [2023-11-23 21:19:05,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 21:19:05,032 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 79 [2023-11-23 21:19:05,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:05,076 INFO L225 Difference]: With dead ends: 15080 [2023-11-23 21:19:05,076 INFO L226 Difference]: Without dead ends: 9533 [2023-11-23 21:19:05,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-11-23 21:19:05,096 INFO L413 NwaCegarLoop]: 712 mSDtfsCounter, 646 mSDsluCounter, 3365 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 4077 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:05,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 4077 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-23 21:19:05,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9533 states. [2023-11-23 21:19:05,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9533 to 9386. [2023-11-23 21:19:05,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9386 states, 6492 states have (on average 1.3365680837954406) internal successors, (8677), 6578 states have internal predecessors, (8677), 2030 states have call successors, (2030), 840 states have call predecessors, (2030), 863 states have return successors, (2081), 1983 states have call predecessors, (2081), 2029 states have call successors, (2081) [2023-11-23 21:19:05,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9386 states to 9386 states and 12788 transitions. [2023-11-23 21:19:05,879 INFO L78 Accepts]: Start accepts. Automaton has 9386 states and 12788 transitions. Word has length 79 [2023-11-23 21:19:05,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:05,879 INFO L495 AbstractCegarLoop]: Abstraction has 9386 states and 12788 transitions. [2023-11-23 21:19:05,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 5 states have internal predecessors, (48), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:19:05,879 INFO L276 IsEmpty]: Start isEmpty. Operand 9386 states and 12788 transitions. [2023-11-23 21:19:05,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-11-23 21:19:05,886 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:05,887 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:05,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8328de04-7086-48cc-a8ae-018fcc9e9ba4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:19:06,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8328de04-7086-48cc-a8ae-018fcc9e9ba4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 21:19:06,113 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:06,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:06,113 INFO L85 PathProgramCache]: Analyzing trace with hash -915033321, now seen corresponding path program 1 times [2023-11-23 21:19:06,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:06,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241794715] [2023-11-23 21:19:06,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:06,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:06,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:06,566 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-23 21:19:06,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:06,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241794715] [2023-11-23 21:19:06,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241794715] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:19:06,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869932344] [2023-11-23 21:19:06,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:06,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:06,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8328de04-7086-48cc-a8ae-018fcc9e9ba4/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:19:06,568 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8328de04-7086-48cc-a8ae-018fcc9e9ba4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:19:06,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8328de04-7086-48cc-a8ae-018fcc9e9ba4/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:19:07,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:07,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:19:07,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:19:07,349 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-23 21:19:07,350 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:19:07,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869932344] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:07,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:19:07,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2023-11-23 21:19:07,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566971816] [2023-11-23 21:19:07,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:07,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:19:07,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:07,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:19:07,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:19:07,352 INFO L87 Difference]: Start difference. First operand 9386 states and 12788 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7)