./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--input--touchscreen--tsc2005.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_b5475bd3-32f8-453d-b56a-ebdec21bf2f4/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5475bd3-32f8-453d-b56a-ebdec21bf2f4/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_b5475bd3-32f8-453d-b56a-ebdec21bf2f4/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5475bd3-32f8-453d-b56a-ebdec21bf2f4/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--input--touchscreen--tsc2005.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5475bd3-32f8-453d-b56a-ebdec21bf2f4/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_b5475bd3-32f8-453d-b56a-ebdec21bf2f4/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 9e6cb9575d01b247a38f631016ebb8c3cacd422c61aaebbf8be9e6e4657d498f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:31:40,456 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:31:40,576 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5475bd3-32f8-453d-b56a-ebdec21bf2f4/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:31:40,583 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:31:40,584 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:31:40,623 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:31:40,624 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:31:40,625 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:31:40,626 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:31:40,631 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:31:40,632 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:31:40,633 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:31:40,634 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:31:40,636 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:31:40,636 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:31:40,637 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:31:40,638 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:31:40,638 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:31:40,639 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:31:40,639 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:31:40,640 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:31:40,640 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:31:40,642 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:31:40,642 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:31:40,643 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:31:40,643 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:31:40,643 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:31:40,644 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:31:40,644 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:31:40,645 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:31:40,646 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:31:40,646 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:31:40,647 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:31:40,647 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:31:40,647 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:31:40,648 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:31:40,648 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:31:40,648 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:31:40,648 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:31:40,649 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:31:40,649 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:31:40,649 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:31:40,649 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:31:40,650 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:31:40,650 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_b5475bd3-32f8-453d-b56a-ebdec21bf2f4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5475bd3-32f8-453d-b56a-ebdec21bf2f4/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e6cb9575d01b247a38f631016ebb8c3cacd422c61aaebbf8be9e6e4657d498f [2023-11-23 21:31:40,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:31:41,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:31:41,011 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:31:41,013 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:31:41,013 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:31:41,015 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5475bd3-32f8-453d-b56a-ebdec21bf2f4/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--input--touchscreen--tsc2005.ko-entry_point.cil.out.i [2023-11-23 21:31:44,068 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:31:44,723 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:31:44,724 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5475bd3-32f8-453d-b56a-ebdec21bf2f4/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--input--touchscreen--tsc2005.ko-entry_point.cil.out.i [2023-11-23 21:31:44,769 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5475bd3-32f8-453d-b56a-ebdec21bf2f4/bin/utaipan-verify-mE87zJ7Ire/data/c5ccb878b/2221202801a041478d8df00d8b65b230/FLAG8ee1c9e91 [2023-11-23 21:31:44,789 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5475bd3-32f8-453d-b56a-ebdec21bf2f4/bin/utaipan-verify-mE87zJ7Ire/data/c5ccb878b/2221202801a041478d8df00d8b65b230 [2023-11-23 21:31:44,794 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:31:44,796 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:31:44,797 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:31:44,798 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:31:44,807 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:31:44,808 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:31:44" (1/1) ... [2023-11-23 21:31:44,809 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38b706a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:44, skipping insertion in model container [2023-11-23 21:31:44,810 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:31:44" (1/1) ... [2023-11-23 21:31:44,963 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:31:46,308 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_b5475bd3-32f8-453d-b56a-ebdec21bf2f4/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--input--touchscreen--tsc2005.ko-entry_point.cil.out.i[172920,172933] [2023-11-23 21:31:46,501 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:31:46,534 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:31:46,880 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_b5475bd3-32f8-453d-b56a-ebdec21bf2f4/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--input--touchscreen--tsc2005.ko-entry_point.cil.out.i[172920,172933] [2023-11-23 21:31:46,904 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:31:47,010 WARN L675 CHandler]: The function sprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:31:47,018 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:31:47,019 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:47 WrapperNode [2023-11-23 21:31:47,019 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:31:47,021 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:31:47,021 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:31:47,021 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:31:47,028 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:47" (1/1) ... [2023-11-23 21:31:47,122 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:47" (1/1) ... [2023-11-23 21:31:47,229 INFO L138 Inliner]: procedures = 262, calls = 943, calls flagged for inlining = 102, calls inlined = 94, statements flattened = 2428 [2023-11-23 21:31:47,229 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:31:47,230 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:31:47,230 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:31:47,231 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:31:47,240 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:47" (1/1) ... [2023-11-23 21:31:47,240 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:47" (1/1) ... [2023-11-23 21:31:47,321 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:47" (1/1) ... [2023-11-23 21:31:47,321 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:47" (1/1) ... [2023-11-23 21:31:47,420 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:47" (1/1) ... [2023-11-23 21:31:47,437 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:47" (1/1) ... [2023-11-23 21:31:47,455 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:47" (1/1) ... [2023-11-23 21:31:47,469 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:47" (1/1) ... [2023-11-23 21:31:47,496 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:31:47,497 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:31:47,497 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:31:47,497 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:31:47,498 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:47" (1/1) ... [2023-11-23 21:31:47,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:31:47,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5475bd3-32f8-453d-b56a-ebdec21bf2f4/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:31:47,534 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5475bd3-32f8-453d-b56a-ebdec21bf2f4/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:31:47,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5475bd3-32f8-453d-b56a-ebdec21bf2f4/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:31:47,581 INFO L130 BoogieDeclarations]: Found specification of procedure tsc2005_read [2023-11-23 21:31:47,581 INFO L138 BoogieDeclarations]: Found implementation of procedure tsc2005_read [2023-11-23 21:31:47,582 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 21:31:47,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 21:31:47,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-23 21:31:47,582 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-23 21:31:47,584 INFO L130 BoogieDeclarations]: Found specification of procedure spi_sync [2023-11-23 21:31:47,584 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_sync [2023-11-23 21:31:47,585 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 21:31:47,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 21:31:47,585 INFO L130 BoogieDeclarations]: Found specification of procedure disable_irq [2023-11-23 21:31:47,585 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_irq [2023-11-23 21:31:47,585 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_trylock [2023-11-23 21:31:47,586 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_trylock [2023-11-23 21:31:47,586 INFO L130 BoogieDeclarations]: Found specification of procedure usleep_range [2023-11-23 21:31:47,586 INFO L138 BoogieDeclarations]: Found implementation of procedure usleep_range [2023-11-23 21:31:47,586 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-23 21:31:47,587 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-23 21:31:47,587 INFO L130 BoogieDeclarations]: Found specification of procedure of_property_read_u32 [2023-11-23 21:31:47,587 INFO L138 BoogieDeclarations]: Found implementation of procedure of_property_read_u32 [2023-11-23 21:31:47,588 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_trylock_mutex_of_tsc2005 [2023-11-23 21:31:47,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_trylock_mutex_of_tsc2005 [2023-11-23 21:31:47,588 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 21:31:47,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 21:31:47,589 INFO L130 BoogieDeclarations]: Found specification of procedure queue_delayed_work_on [2023-11-23 21:31:47,590 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_delayed_work_on [2023-11-23 21:31:47,590 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_3 [2023-11-23 21:31:47,590 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_3 [2023-11-23 21:31:47,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-23 21:31:47,591 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-23 21:31:47,591 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_irq_2 [2023-11-23 21:31:47,591 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_irq_2 [2023-11-23 21:31:47,592 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:31:47,592 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:31:47,593 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-11-23 21:31:47,593 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-11-23 21:31:47,593 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-23 21:31:47,593 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-23 21:31:47,593 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_4 [2023-11-23 21:31:47,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_4 [2023-11-23 21:31:47,594 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_mutex_of_tsc2005 [2023-11-23 21:31:47,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_mutex_of_tsc2005 [2023-11-23 21:31:47,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:31:47,594 INFO L130 BoogieDeclarations]: Found specification of procedure input_event [2023-11-23 21:31:47,595 INFO L138 BoogieDeclarations]: Found implementation of procedure input_event [2023-11-23 21:31:47,595 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2023-11-23 21:31:47,595 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2023-11-23 21:31:47,595 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2023-11-23 21:31:47,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:31:47,595 INFO L130 BoogieDeclarations]: Found specification of procedure tsc2005_stop_scan [2023-11-23 21:31:47,596 INFO L138 BoogieDeclarations]: Found implementation of procedure tsc2005_stop_scan [2023-11-23 21:31:47,596 INFO L130 BoogieDeclarations]: Found specification of procedure tsc2005_write [2023-11-23 21:31:47,596 INFO L138 BoogieDeclarations]: Found implementation of procedure tsc2005_write [2023-11-23 21:31:47,596 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2023-11-23 21:31:47,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2023-11-23 21:31:47,596 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-23 21:31:47,597 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-23 21:31:47,597 INFO L130 BoogieDeclarations]: Found specification of procedure tsc2005_cmd [2023-11-23 21:31:47,597 INFO L138 BoogieDeclarations]: Found implementation of procedure tsc2005_cmd [2023-11-23 21:31:47,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:31:47,598 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2023-11-23 21:31:47,599 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2023-11-23 21:31:47,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:31:47,600 INFO L130 BoogieDeclarations]: Found specification of procedure spi_message_add_tail [2023-11-23 21:31:47,600 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_message_add_tail [2023-11-23 21:31:47,600 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-23 21:31:47,600 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-23 21:31:47,600 INFO L130 BoogieDeclarations]: Found specification of procedure tsc2005_esd_work [2023-11-23 21:31:47,601 INFO L138 BoogieDeclarations]: Found implementation of procedure tsc2005_esd_work [2023-11-23 21:31:47,601 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2023-11-23 21:31:47,601 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2023-11-23 21:31:47,601 INFO L130 BoogieDeclarations]: Found specification of procedure to_spi_device [2023-11-23 21:31:47,602 INFO L138 BoogieDeclarations]: Found implementation of procedure to_spi_device [2023-11-23 21:31:47,602 INFO L130 BoogieDeclarations]: Found specification of procedure tsc2005_suspend [2023-11-23 21:31:47,602 INFO L138 BoogieDeclarations]: Found implementation of procedure tsc2005_suspend [2023-11-23 21:31:47,602 INFO L130 BoogieDeclarations]: Found specification of procedure input_report_key [2023-11-23 21:31:47,602 INFO L138 BoogieDeclarations]: Found implementation of procedure input_report_key [2023-11-23 21:31:47,602 INFO L130 BoogieDeclarations]: Found specification of procedure round_jiffies_relative [2023-11-23 21:31:47,603 INFO L138 BoogieDeclarations]: Found implementation of procedure round_jiffies_relative [2023-11-23 21:31:47,603 INFO L130 BoogieDeclarations]: Found specification of procedure input_report_abs [2023-11-23 21:31:47,603 INFO L138 BoogieDeclarations]: Found implementation of procedure input_report_abs [2023-11-23 21:31:47,603 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2023-11-23 21:31:47,603 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2023-11-23 21:31:47,604 INFO L130 BoogieDeclarations]: Found specification of procedure devm_request_threaded_irq [2023-11-23 21:31:47,604 INFO L138 BoogieDeclarations]: Found implementation of procedure devm_request_threaded_irq [2023-11-23 21:31:47,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:31:47,605 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2023-11-23 21:31:47,605 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2023-11-23 21:31:47,605 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_remove_group [2023-11-23 21:31:47,605 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_remove_group [2023-11-23 21:31:47,605 INFO L130 BoogieDeclarations]: Found specification of procedure regulator_disable [2023-11-23 21:31:47,606 INFO L138 BoogieDeclarations]: Found implementation of procedure regulator_disable [2023-11-23 21:31:47,606 INFO L130 BoogieDeclarations]: Found specification of procedure reg_check_2 [2023-11-23 21:31:47,606 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_check_2 [2023-11-23 21:31:47,606 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_timer_4 [2023-11-23 21:31:47,606 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_timer_4 [2023-11-23 21:31:47,607 INFO L130 BoogieDeclarations]: Found specification of procedure tsc2005_start_scan [2023-11-23 21:31:47,607 INFO L138 BoogieDeclarations]: Found implementation of procedure tsc2005_start_scan [2023-11-23 21:31:47,607 INFO L130 BoogieDeclarations]: Found specification of procedure tsc2005_resume [2023-11-23 21:31:47,607 INFO L138 BoogieDeclarations]: Found implementation of procedure tsc2005_resume [2023-11-23 21:31:47,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:31:47,607 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-23 21:31:47,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-23 21:31:47,608 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-23 21:31:47,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-23 21:31:47,608 INFO L130 BoogieDeclarations]: Found specification of procedure enable_irq [2023-11-23 21:31:47,608 INFO L138 BoogieDeclarations]: Found implementation of procedure enable_irq [2023-11-23 21:31:47,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:31:47,609 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_4 [2023-11-23 21:31:47,610 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_4 [2023-11-23 21:31:47,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:31:47,610 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2023-11-23 21:31:47,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2023-11-23 21:31:47,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:31:47,610 INFO L130 BoogieDeclarations]: Found specification of procedure input_set_abs_params [2023-11-23 21:31:47,611 INFO L138 BoogieDeclarations]: Found implementation of procedure input_set_abs_params [2023-11-23 21:31:47,612 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2023-11-23 21:31:47,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2023-11-23 21:31:47,612 INFO L130 BoogieDeclarations]: Found specification of procedure spi_message_init [2023-11-23 21:31:47,612 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_message_init [2023-11-23 21:31:47,612 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_2 [2023-11-23 21:31:47,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_2 [2023-11-23 21:31:47,613 INFO L130 BoogieDeclarations]: Found specification of procedure tsc2005_setup_read [2023-11-23 21:31:47,613 INFO L138 BoogieDeclarations]: Found implementation of procedure tsc2005_setup_read [2023-11-23 21:31:47,613 INFO L130 BoogieDeclarations]: Found specification of procedure __tsc2005_enable [2023-11-23 21:31:47,613 INFO L138 BoogieDeclarations]: Found implementation of procedure __tsc2005_enable [2023-11-23 21:31:47,613 INFO L130 BoogieDeclarations]: Found specification of procedure spi_get_drvdata [2023-11-23 21:31:47,613 INFO L138 BoogieDeclarations]: Found implementation of procedure spi_get_drvdata [2023-11-23 21:31:47,614 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_mutex_of_tsc2005 [2023-11-23 21:31:47,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_mutex_of_tsc2005 [2023-11-23 21:31:47,614 INFO L130 BoogieDeclarations]: Found specification of procedure tsc2005_irq_thread [2023-11-23 21:31:47,614 INFO L138 BoogieDeclarations]: Found implementation of procedure tsc2005_irq_thread [2023-11-23 21:31:47,614 INFO L130 BoogieDeclarations]: Found specification of procedure __tsc2005_disable [2023-11-23 21:31:47,615 INFO L138 BoogieDeclarations]: Found implementation of procedure __tsc2005_disable [2023-11-23 21:31:47,616 INFO L130 BoogieDeclarations]: Found specification of procedure tsc2005_update_pen_state [2023-11-23 21:31:47,616 INFO L138 BoogieDeclarations]: Found implementation of procedure tsc2005_update_pen_state [2023-11-23 21:31:47,616 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2023-11-23 21:31:47,617 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2023-11-23 21:31:47,617 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_delayed_work [2023-11-23 21:31:47,617 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_delayed_work [2023-11-23 21:31:47,617 INFO L130 BoogieDeclarations]: Found specification of procedure tsc2005_set_reset [2023-11-23 21:31:47,617 INFO L138 BoogieDeclarations]: Found implementation of procedure tsc2005_set_reset [2023-11-23 21:31:47,618 INFO L130 BoogieDeclarations]: Found specification of procedure dev_warn [2023-11-23 21:31:47,618 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_warn [2023-11-23 21:31:47,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:31:47,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:31:47,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:31:47,622 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-11-23 21:31:47,623 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-11-23 21:31:48,187 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:31:48,193 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:31:48,448 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 21:31:54,681 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:31:55,641 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:31:55,642 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:31:55,644 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:31:55 BoogieIcfgContainer [2023-11-23 21:31:55,651 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:31:55,654 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:31:55,654 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:31:55,658 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:31:55,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:31:44" (1/3) ... [2023-11-23 21:31:55,659 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@626943b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:31:55, skipping insertion in model container [2023-11-23 21:31:55,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:31:47" (2/3) ... [2023-11-23 21:31:55,662 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@626943b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:31:55, skipping insertion in model container [2023-11-23 21:31:55,662 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:31:55" (3/3) ... [2023-11-23 21:31:55,667 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--input--touchscreen--tsc2005.ko-entry_point.cil.out.i [2023-11-23 21:31:55,688 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:31:55,688 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:31:55,784 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:31:55,792 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;@1703ea7a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:31:55,792 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:31:55,803 INFO L276 IsEmpty]: Start isEmpty. Operand has 700 states, 421 states have (on average 1.3847980997624703) internal successors, (583), 452 states have internal predecessors, (583), 210 states have call successors, (210), 68 states have call predecessors, (210), 67 states have return successors, (198), 194 states have call predecessors, (198), 198 states have call successors, (198) [2023-11-23 21:31:55,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-23 21:31:55,890 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:31:55,890 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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] [2023-11-23 21:31:55,891 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:31:55,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:31:55,896 INFO L85 PathProgramCache]: Analyzing trace with hash -844855809, now seen corresponding path program 1 times [2023-11-23 21:31:55,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:31:55,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826737745] [2023-11-23 21:31:55,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:31:55,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:31:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:31:56,775 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-23 21:31:56,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:31:56,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826737745] [2023-11-23 21:31:56,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826737745] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:31:56,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:31:56,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:31:56,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343463461] [2023-11-23 21:31:56,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:31:56,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:31:56,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:31:56,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:31:56,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:31:56,826 INFO L87 Difference]: Start difference. First operand has 700 states, 421 states have (on average 1.3847980997624703) internal successors, (583), 452 states have internal predecessors, (583), 210 states have call successors, (210), 68 states have call predecessors, (210), 67 states have return successors, (198), 194 states have call predecessors, (198), 198 states have call successors, (198) Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-23 21:31:59,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:32:01,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:32:03,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:32:05,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:32:07,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:32:08,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:32:08,034 INFO L93 Difference]: Finished difference Result 1896 states and 2740 transitions. [2023-11-23 21:32:08,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:32:08,036 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 83 [2023-11-23 21:32:08,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:32:08,061 INFO L225 Difference]: With dead ends: 1896 [2023-11-23 21:32:08,062 INFO L226 Difference]: Without dead ends: 1180 [2023-11-23 21:32:08,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 21:32:08,078 INFO L413 NwaCegarLoop]: 923 mSDtfsCounter, 750 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 6 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 1735 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:32:08,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [750 Valid, 1735 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 258 Invalid, 5 Unknown, 0 Unchecked, 11.0s Time] [2023-11-23 21:32:08,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2023-11-23 21:32:08,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1175. [2023-11-23 21:32:08,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 740 states have (on average 1.3756756756756756) internal successors, (1018), 771 states have internal predecessors, (1018), 322 states have call successors, (322), 117 states have call predecessors, (322), 112 states have return successors, (323), 297 states have call predecessors, (323), 315 states have call successors, (323) [2023-11-23 21:32:08,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 1663 transitions. [2023-11-23 21:32:08,285 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 1663 transitions. Word has length 83 [2023-11-23 21:32:08,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:32:08,287 INFO L495 AbstractCegarLoop]: Abstraction has 1175 states and 1663 transitions. [2023-11-23 21:32:08,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-23 21:32:08,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 1663 transitions. [2023-11-23 21:32:08,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-23 21:32:08,293 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:32:08,293 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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] [2023-11-23 21:32:08,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:32:08,294 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:32:08,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:32:08,295 INFO L85 PathProgramCache]: Analyzing trace with hash 2033300393, now seen corresponding path program 1 times [2023-11-23 21:32:08,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:32:08,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095506478] [2023-11-23 21:32:08,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:32:08,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:32:08,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:32:08,643 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-23 21:32:08,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:32:08,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095506478] [2023-11-23 21:32:08,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095506478] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:32:08,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:32:08,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:32:08,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070214811] [2023-11-23 21:32:08,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:32:08,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:32:08,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:32:08,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:32:08,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:32:08,648 INFO L87 Difference]: Start difference. First operand 1175 states and 1663 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2023-11-23 21:32:10,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:32:13,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:32:15,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:32:17,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:32:19,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:32:21,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:32:21,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:32:21,897 INFO L93 Difference]: Finished difference Result 3458 states and 4897 transitions. [2023-11-23 21:32:21,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:32:21,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 82 [2023-11-23 21:32:21,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:32:21,918 INFO L225 Difference]: With dead ends: 3458 [2023-11-23 21:32:21,918 INFO L226 Difference]: Without dead ends: 2296 [2023-11-23 21:32:21,924 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 21:32:21,925 INFO L413 NwaCegarLoop]: 830 mSDtfsCounter, 895 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 3 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 1651 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:32:21,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [895 Valid, 1651 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 258 Invalid, 6 Unknown, 0 Unchecked, 13.1s Time] [2023-11-23 21:32:21,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2023-11-23 21:32:22,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 2291. [2023-11-23 21:32:22,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 1447 states have (on average 1.373876986869385) internal successors, (1988), 1503 states have internal predecessors, (1988), 623 states have call successors, (623), 229 states have call predecessors, (623), 220 states have return successors, (632), 580 states have call predecessors, (632), 616 states have call successors, (632) [2023-11-23 21:32:22,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3243 transitions. [2023-11-23 21:32:22,125 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3243 transitions. Word has length 82 [2023-11-23 21:32:22,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:32:22,126 INFO L495 AbstractCegarLoop]: Abstraction has 2291 states and 3243 transitions. [2023-11-23 21:32:22,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2023-11-23 21:32:22,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3243 transitions. [2023-11-23 21:32:22,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-23 21:32:22,131 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:32:22,131 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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] [2023-11-23 21:32:22,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:32:22,132 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:32:22,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:32:22,132 INFO L85 PathProgramCache]: Analyzing trace with hash 845909991, now seen corresponding path program 1 times [2023-11-23 21:32:22,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:32:22,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534365727] [2023-11-23 21:32:22,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:32:22,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:32:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:32:22,298 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-23 21:32:22,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:32:22,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534365727] [2023-11-23 21:32:22,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534365727] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:32:22,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:32:22,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:32:22,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830640679] [2023-11-23 21:32:22,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:32:22,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:32:22,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:32:22,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:32:22,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:32:22,301 INFO L87 Difference]: Start difference. First operand 2291 states and 3243 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:32:24,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:32:26,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:32:26,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:32:26,916 INFO L93 Difference]: Finished difference Result 2293 states and 3244 transitions. [2023-11-23 21:32:26,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:32:26,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 84 [2023-11-23 21:32:26,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:32:26,935 INFO L225 Difference]: With dead ends: 2293 [2023-11-23 21:32:26,935 INFO L226 Difference]: Without dead ends: 2290 [2023-11-23 21:32:26,937 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 21:32:26,938 INFO L413 NwaCegarLoop]: 826 mSDtfsCounter, 926 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:32:26,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [926 Valid, 826 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 127 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2023-11-23 21:32:26,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2023-11-23 21:32:27,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 2290. [2023-11-23 21:32:27,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2290 states, 1447 states have (on average 1.372494816862474) internal successors, (1986), 1502 states have internal predecessors, (1986), 622 states have call successors, (622), 229 states have call predecessors, (622), 220 states have return successors, (632), 580 states have call predecessors, (632), 616 states have call successors, (632) [2023-11-23 21:32:27,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2290 states to 2290 states and 3240 transitions. [2023-11-23 21:32:27,151 INFO L78 Accepts]: Start accepts. Automaton has 2290 states and 3240 transitions. Word has length 84 [2023-11-23 21:32:27,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:32:27,152 INFO L495 AbstractCegarLoop]: Abstraction has 2290 states and 3240 transitions. [2023-11-23 21:32:27,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:32:27,153 INFO L276 IsEmpty]: Start isEmpty. Operand 2290 states and 3240 transitions. [2023-11-23 21:32:27,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-11-23 21:32:27,157 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:32:27,158 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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] [2023-11-23 21:32:27,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:32:27,158 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:32:27,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:32:27,159 INFO L85 PathProgramCache]: Analyzing trace with hash 453114753, now seen corresponding path program 1 times [2023-11-23 21:32:27,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:32:27,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734854925] [2023-11-23 21:32:27,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:32:27,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:32:27,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:32:27,390 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-23 21:32:27,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:32:27,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734854925] [2023-11-23 21:32:27,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734854925] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:32:27,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:32:27,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:32:27,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891037178] [2023-11-23 21:32:27,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:32:27,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:32:27,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:32:27,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:32:27,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:32:27,395 INFO L87 Difference]: Start difference. First operand 2290 states and 3240 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:32:29,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:32:31,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:32:32,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:32:32,052 INFO L93 Difference]: Finished difference Result 2292 states and 3241 transitions. [2023-11-23 21:32:32,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:32:32,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 85 [2023-11-23 21:32:32,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:32:32,073 INFO L225 Difference]: With dead ends: 2292 [2023-11-23 21:32:32,073 INFO L226 Difference]: Without dead ends: 2289 [2023-11-23 21:32:32,075 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 21:32:32,080 INFO L413 NwaCegarLoop]: 824 mSDtfsCounter, 923 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:32:32,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [923 Valid, 824 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2023-11-23 21:32:32,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2023-11-23 21:32:32,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 2289. [2023-11-23 21:32:32,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2289 states, 1447 states have (on average 1.3711126468555632) internal successors, (1984), 1501 states have internal predecessors, (1984), 621 states have call successors, (621), 229 states have call predecessors, (621), 220 states have return successors, (632), 580 states have call predecessors, (632), 616 states have call successors, (632) [2023-11-23 21:32:32,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2289 states to 2289 states and 3237 transitions. [2023-11-23 21:32:32,278 INFO L78 Accepts]: Start accepts. Automaton has 2289 states and 3237 transitions. Word has length 85 [2023-11-23 21:32:32,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:32:32,279 INFO L495 AbstractCegarLoop]: Abstraction has 2289 states and 3237 transitions. [2023-11-23 21:32:32,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:32:32,279 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states and 3237 transitions. [2023-11-23 21:32:32,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-23 21:32:32,283 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:32:32,283 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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] [2023-11-23 21:32:32,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:32:32,283 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:32:32,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:32:32,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1161369130, now seen corresponding path program 1 times [2023-11-23 21:32:32,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:32:32,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624114925] [2023-11-23 21:32:32,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:32:32,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:32:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:32:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-23 21:32:32,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:32:32,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624114925] [2023-11-23 21:32:32,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624114925] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:32:32,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:32:32,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:32:32,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380239310] [2023-11-23 21:32:32,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:32:32,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:32:32,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:32:32,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:32:32,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:32:32,491 INFO L87 Difference]: Start difference. First operand 2289 states and 3237 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:32:34,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:32:37,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:32:37,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:32:37,300 INFO L93 Difference]: Finished difference Result 2291 states and 3238 transitions. [2023-11-23 21:32:37,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:32:37,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 86 [2023-11-23 21:32:37,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:32:37,317 INFO L225 Difference]: With dead ends: 2291 [2023-11-23 21:32:37,318 INFO L226 Difference]: Without dead ends: 2284 [2023-11-23 21:32:37,320 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 21:32:37,321 INFO L413 NwaCegarLoop]: 822 mSDtfsCounter, 920 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 920 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:32:37,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [920 Valid, 822 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2023-11-23 21:32:37,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2023-11-23 21:32:37,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 2284. [2023-11-23 21:32:37,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 1443 states have (on average 1.37006237006237) internal successors, (1977), 1496 states have internal predecessors, (1977), 620 states have call successors, (620), 229 states have call predecessors, (620), 220 states have return successors, (632), 580 states have call predecessors, (632), 616 states have call successors, (632) [2023-11-23 21:32:37,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 3229 transitions. [2023-11-23 21:32:37,515 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 3229 transitions. Word has length 86 [2023-11-23 21:32:37,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:32:37,516 INFO L495 AbstractCegarLoop]: Abstraction has 2284 states and 3229 transitions. [2023-11-23 21:32:37,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 21:32:37,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 3229 transitions. [2023-11-23 21:32:37,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-23 21:32:37,520 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:32:37,520 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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, 1] [2023-11-23 21:32:37,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:32:37,520 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:32:37,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:32:37,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1883811990, now seen corresponding path program 1 times [2023-11-23 21:32:37,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:32:37,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461560059] [2023-11-23 21:32:37,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:32:37,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:32:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:32:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-23 21:32:37,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:32:37,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461560059] [2023-11-23 21:32:37,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461560059] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:32:37,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:32:37,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:32:37,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972131432] [2023-11-23 21:32:37,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:32:37,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:32:37,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:32:37,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:32:37,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:32:37,840 INFO L87 Difference]: Start difference. First operand 2284 states and 3229 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-23 21:32:40,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:32:42,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []