./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--p54--p54usb.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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd701b8c-36a5-45e0-b2d1-6854b586f5fe/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd701b8c-36a5-45e0-b2d1-6854b586f5fe/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_dd701b8c-36a5-45e0-b2d1-6854b586f5fe/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd701b8c-36a5-45e0-b2d1-6854b586f5fe/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd701b8c-36a5-45e0-b2d1-6854b586f5fe/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_dd701b8c-36a5-45e0-b2d1-6854b586f5fe/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 a78ad5bb06da9a7367e7c9e45cee20fe00113336b7bc544675fdd46fc445ae5c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:36:47,565 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:36:47,646 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd701b8c-36a5-45e0-b2d1-6854b586f5fe/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 20:36:47,652 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:36:47,652 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:36:47,678 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:36:47,679 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:36:47,679 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:36:47,680 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:36:47,681 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:36:47,681 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:36:47,682 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:36:47,682 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:36:47,683 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:36:47,684 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:36:47,684 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:36:47,685 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:36:47,685 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:36:47,686 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:36:47,686 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:36:47,687 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:36:47,688 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:36:47,688 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:36:47,689 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:36:47,689 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:36:47,690 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:36:47,690 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:36:47,691 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:36:47,691 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:36:47,691 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:36:47,692 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:36:47,692 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:36:47,693 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:36:47,693 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:36:47,693 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:47,693 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:36:47,694 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:36:47,694 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:36:47,694 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:36:47,694 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:36:47,695 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:36:47,695 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:36:47,695 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:36:47,695 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:36:47,696 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_dd701b8c-36a5-45e0-b2d1-6854b586f5fe/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd701b8c-36a5-45e0-b2d1-6854b586f5fe/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a78ad5bb06da9a7367e7c9e45cee20fe00113336b7bc544675fdd46fc445ae5c [2023-11-23 20:36:47,988 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:36:48,009 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:36:48,012 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:36:48,014 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:36:48,014 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:36:48,016 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd701b8c-36a5-45e0-b2d1-6854b586f5fe/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i [2023-11-23 20:36:51,189 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:36:51,976 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:36:51,977 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd701b8c-36a5-45e0-b2d1-6854b586f5fe/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i [2023-11-23 20:36:52,030 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd701b8c-36a5-45e0-b2d1-6854b586f5fe/bin/utaipan-verify-mE87zJ7Ire/data/62262e131/fdb21b1a14994c6f8805892eca0cc888/FLAGfe3ebfa11 [2023-11-23 20:36:52,055 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd701b8c-36a5-45e0-b2d1-6854b586f5fe/bin/utaipan-verify-mE87zJ7Ire/data/62262e131/fdb21b1a14994c6f8805892eca0cc888 [2023-11-23 20:36:52,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:36:52,060 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:36:52,069 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:52,069 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:36:52,075 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:36:52,076 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:52" (1/1) ... [2023-11-23 20:36:52,077 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e9a5ad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:52, skipping insertion in model container [2023-11-23 20:36:52,077 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:52" (1/1) ... [2023-11-23 20:36:52,255 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:36:53,598 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_dd701b8c-36a5-45e0-b2d1-6854b586f5fe/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i[181063,181076] [2023-11-23 20:36:54,190 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:54,239 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:36:54,412 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_dd701b8c-36a5-45e0-b2d1-6854b586f5fe/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i[181063,181076] [2023-11-23 20:36:54,515 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:54,583 WARN L675 CHandler]: The function memcmp is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:36:54,591 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:36:54,592 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54 WrapperNode [2023-11-23 20:36:54,592 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:54,593 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:36:54,594 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:36:54,594 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:36:54,601 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:54,675 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:54,865 INFO L138 Inliner]: procedures = 183, calls = 1631, calls flagged for inlining = 85, calls inlined = 66, statements flattened = 3148 [2023-11-23 20:36:54,866 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:36:54,867 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:36:54,867 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:36:54,867 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:36:54,876 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:54,877 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:54,925 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:54,926 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:55,022 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:55,038 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:55,057 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:55,074 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:55,100 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:36:55,101 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:36:55,101 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:36:55,101 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:36:55,102 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (1/1) ... [2023-11-23 20:36:55,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:55,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd701b8c-36a5-45e0-b2d1-6854b586f5fe/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:55,134 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd701b8c-36a5-45e0-b2d1-6854b586f5fe/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:36:55,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd701b8c-36a5-45e0-b2d1-6854b586f5fe/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:36:55,179 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2023-11-23 20:36:55,179 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2023-11-23 20:36:55,180 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_disconnect [2023-11-23 20:36:55,180 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_disconnect [2023-11-23 20:36:55,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 20:36:55,180 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_5 [2023-11-23 20:36:55,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_5 [2023-11-23 20:36:55,182 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_2 [2023-11-23 20:36:55,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_2 [2023-11-23 20:36:55,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-23 20:36:55,183 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2023-11-23 20:36:55,183 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2023-11-23 20:36:55,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-23 20:36:55,183 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 20:36:55,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 20:36:55,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:36:55,184 INFO L130 BoogieDeclarations]: Found specification of procedure skb_push [2023-11-23 20:36:55,185 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_push [2023-11-23 20:36:55,185 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2023-11-23 20:36:55,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2023-11-23 20:36:55,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-23 20:36:55,186 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-23 20:36:55,186 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-11-23 20:36:55,186 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-11-23 20:36:55,187 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_stop [2023-11-23 20:36:55,188 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_stop [2023-11-23 20:36:55,188 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 20:36:55,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 20:36:55,189 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2023-11-23 20:36:55,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2023-11-23 20:36:55,189 INFO L130 BoogieDeclarations]: Found specification of procedure device_unlock [2023-11-23 20:36:55,189 INFO L138 BoogieDeclarations]: Found implementation of procedure device_unlock [2023-11-23 20:36:55,189 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-23 20:36:55,189 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-23 20:36:55,190 INFO L130 BoogieDeclarations]: Found specification of procedure __netdev_alloc_skb [2023-11-23 20:36:55,190 INFO L138 BoogieDeclarations]: Found implementation of procedure __netdev_alloc_skb [2023-11-23 20:36:55,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:36:55,191 INFO L130 BoogieDeclarations]: Found specification of procedure p54_free_skb [2023-11-23 20:36:55,191 INFO L138 BoogieDeclarations]: Found implementation of procedure p54_free_skb [2023-11-23 20:36:55,191 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 20:36:55,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 20:36:55,191 INFO L130 BoogieDeclarations]: Found specification of procedure skb_pull [2023-11-23 20:36:55,191 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_pull [2023-11-23 20:36:55,192 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_pre_reset [2023-11-23 20:36:55,192 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_pre_reset [2023-11-23 20:36:55,192 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-23 20:36:55,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-23 20:36:55,192 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_rx_cb [2023-11-23 20:36:55,192 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_rx_cb [2023-11-23 20:36:55,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-23 20:36:55,193 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-23 20:36:55,193 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 20:36:55,193 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 20:36:55,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:36:55,193 INFO L130 BoogieDeclarations]: Found specification of procedure crc32_le [2023-11-23 20:36:55,194 INFO L138 BoogieDeclarations]: Found implementation of procedure crc32_le [2023-11-23 20:36:55,194 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2023-11-23 20:36:55,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2023-11-23 20:36:55,194 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_3 [2023-11-23 20:36:55,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_3 [2023-11-23 20:36:55,195 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-23 20:36:55,196 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-23 20:36:55,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:36:55,197 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_read [2023-11-23 20:36:55,197 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_read [2023-11-23 20:36:55,197 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_write [2023-11-23 20:36:55,197 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_write [2023-11-23 20:36:55,197 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2023-11-23 20:36:55,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2023-11-23 20:36:55,197 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2023-11-23 20:36:55,198 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2023-11-23 20:36:55,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:36:55,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 20:36:55,198 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_put_dev [2023-11-23 20:36:55,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_put_dev [2023-11-23 20:36:55,199 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2023-11-23 20:36:55,199 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-23 20:36:55,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-23 20:36:55,199 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_resume [2023-11-23 20:36:55,199 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_resume [2023-11-23 20:36:55,199 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2023-11-23 20:36:55,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2023-11-23 20:36:55,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 20:36:55,200 INFO L130 BoogieDeclarations]: Found specification of procedure p54_find_type [2023-11-23 20:36:55,200 INFO L138 BoogieDeclarations]: Found implementation of procedure p54_find_type [2023-11-23 20:36:55,201 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2023-11-23 20:36:55,201 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2023-11-23 20:36:55,201 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_get_dev [2023-11-23 20:36:55,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_get_dev [2023-11-23 20:36:55,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:36:55,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 20:36:55,202 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_tail [2023-11-23 20:36:55,202 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_tail [2023-11-23 20:36:55,202 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_free_urbs [2023-11-23 20:36:55,202 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_free_urbs [2023-11-23 20:36:55,202 INFO L130 BoogieDeclarations]: Found specification of procedure skb_unlink [2023-11-23 20:36:55,203 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_unlink [2023-11-23 20:36:55,203 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_open [2023-11-23 20:36:55,203 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_open [2023-11-23 20:36:55,203 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-23 20:36:55,203 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-23 20:36:55,203 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2023-11-23 20:36:55,203 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2023-11-23 20:36:55,204 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2023-11-23 20:36:55,204 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2023-11-23 20:36:55,204 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-11-23 20:36:55,204 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-11-23 20:36:55,205 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_bulk_msg [2023-11-23 20:36:55,205 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_bulk_msg [2023-11-23 20:36:55,205 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2023-11-23 20:36:55,205 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2023-11-23 20:36:55,206 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2023-11-23 20:36:55,206 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2023-11-23 20:36:55,206 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_post_reset [2023-11-23 20:36:55,206 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_post_reset [2023-11-23 20:36:55,207 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2023-11-23 20:36:55,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2023-11-23 20:36:55,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:36:55,207 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2023-11-23 20:36:55,207 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2023-11-23 20:36:55,208 INFO L130 BoogieDeclarations]: Found specification of procedure skb_tail_pointer [2023-11-23 20:36:55,208 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_tail_pointer [2023-11-23 20:36:55,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-23 20:36:55,208 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-23 20:36:55,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-23 20:36:55,208 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2023-11-23 20:36:55,209 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2023-11-23 20:36:55,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:36:55,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:36:55,819 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:36:55,823 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:36:56,234 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 20:36:57,407 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2023-11-23 20:37:01,207 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:37:02,314 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:37:02,315 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 20:37:02,317 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:37:02 BoogieIcfgContainer [2023-11-23 20:37:02,317 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:37:02,320 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:37:02,320 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:37:02,323 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:37:02,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:36:52" (1/3) ... [2023-11-23 20:37:02,324 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8b4e6d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:37:02, skipping insertion in model container [2023-11-23 20:37:02,324 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:54" (2/3) ... [2023-11-23 20:37:02,325 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8b4e6d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:37:02, skipping insertion in model container [2023-11-23 20:37:02,325 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:37:02" (3/3) ... [2023-11-23 20:37:02,326 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i [2023-11-23 20:37:02,351 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:37:02,351 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:37:02,445 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:37:02,454 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;@5be0e287, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:37:02,455 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:37:02,465 INFO L276 IsEmpty]: Start isEmpty. Operand has 703 states, 445 states have (on average 1.3685393258426966) internal successors, (609), 471 states have internal predecessors, (609), 202 states have call successors, (202), 56 states have call predecessors, (202), 54 states have return successors, (197), 194 states have call predecessors, (197), 197 states have call successors, (197) [2023-11-23 20:37:02,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-23 20:37:02,474 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:02,474 INFO L195 NwaCegarLoop]: trace histogram [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 20:37:02,475 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:02,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:02,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1907474860, now seen corresponding path program 1 times [2023-11-23 20:37:02,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:02,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105726808] [2023-11-23 20:37:02,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:02,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:03,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:04,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:37:04,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:04,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105726808] [2023-11-23 20:37:04,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105726808] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:04,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:04,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:04,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983419256] [2023-11-23 20:37:04,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:04,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:04,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:04,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:04,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:04,274 INFO L87 Difference]: Start difference. First operand has 703 states, 445 states have (on average 1.3685393258426966) internal successors, (609), 471 states have internal predecessors, (609), 202 states have call successors, (202), 56 states have call predecessors, (202), 54 states have return successors, (197), 194 states have call predecessors, (197), 197 states have call successors, (197) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:37:06,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:37:08,372 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 20:37:09,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:09,639 INFO L93 Difference]: Finished difference Result 2073 states and 2987 transitions. [2023-11-23 20:37:09,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:09,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-11-23 20:37:09,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:09,673 INFO L225 Difference]: With dead ends: 2073 [2023-11-23 20:37:09,673 INFO L226 Difference]: Without dead ends: 1362 [2023-11-23 20:37:09,683 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 20:37:09,687 INFO L413 NwaCegarLoop]: 892 mSDtfsCounter, 962 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 1772 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:09,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [962 Valid, 1772 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 232 Invalid, 2 Unknown, 0 Unchecked, 5.1s Time] [2023-11-23 20:37:09,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2023-11-23 20:37:09,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1362. [2023-11-23 20:37:09,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 870 states have (on average 1.3482758620689654) internal successors, (1173), 904 states have internal predecessors, (1173), 386 states have call successors, (386), 106 states have call predecessors, (386), 105 states have return successors, (381), 375 states have call predecessors, (381), 381 states have call successors, (381) [2023-11-23 20:37:09,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 1940 transitions. [2023-11-23 20:37:09,903 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 1940 transitions. Word has length 22 [2023-11-23 20:37:09,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:09,904 INFO L495 AbstractCegarLoop]: Abstraction has 1362 states and 1940 transitions. [2023-11-23 20:37:09,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:37:09,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 1940 transitions. [2023-11-23 20:37:09,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-23 20:37:09,911 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:09,911 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 20:37:09,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:37:09,912 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:09,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:09,913 INFO L85 PathProgramCache]: Analyzing trace with hash 2091315606, now seen corresponding path program 1 times [2023-11-23 20:37:09,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:09,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873172756] [2023-11-23 20:37:09,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:09,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:10,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:11,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:37:11,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:11,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873172756] [2023-11-23 20:37:11,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873172756] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:11,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:11,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:11,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372139250] [2023-11-23 20:37:11,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:11,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:11,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:11,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:11,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:11,319 INFO L87 Difference]: Start difference. First operand 1362 states and 1940 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 20:37:13,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:37:14,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:14,605 INFO L93 Difference]: Finished difference Result 2456 states and 3536 transitions. [2023-11-23 20:37:14,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:14,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2023-11-23 20:37:14,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:14,635 INFO L225 Difference]: With dead ends: 2456 [2023-11-23 20:37:14,635 INFO L226 Difference]: Without dead ends: 2453 [2023-11-23 20:37:14,639 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 20:37:14,640 INFO L413 NwaCegarLoop]: 874 mSDtfsCounter, 795 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 1736 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:14,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [795 Valid, 1736 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 227 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2023-11-23 20:37:14,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2023-11-23 20:37:14,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 2441. [2023-11-23 20:37:14,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2441 states, 1582 states have (on average 1.3565107458912768) internal successors, (2146), 1636 states have internal predecessors, (2146), 682 states have call successors, (682), 179 states have call predecessors, (682), 176 states have return successors, (691), 667 states have call predecessors, (691), 677 states have call successors, (691) [2023-11-23 20:37:14,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 3519 transitions. [2023-11-23 20:37:14,863 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 3519 transitions. Word has length 30 [2023-11-23 20:37:14,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:14,864 INFO L495 AbstractCegarLoop]: Abstraction has 2441 states and 3519 transitions. [2023-11-23 20:37:14,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 20:37:14,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 3519 transitions. [2023-11-23 20:37:14,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-23 20:37:14,870 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:14,870 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 20:37:14,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:37:14,871 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:14,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:14,881 INFO L85 PathProgramCache]: Analyzing trace with hash 405840226, now seen corresponding path program 1 times [2023-11-23 20:37:14,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:14,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584255701] [2023-11-23 20:37:14,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:14,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:37:16,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:16,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584255701] [2023-11-23 20:37:16,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584255701] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:16,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:16,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:16,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321603864] [2023-11-23 20:37:16,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:16,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:16,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:16,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:16,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:16,206 INFO L87 Difference]: Start difference. First operand 2441 states and 3519 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 20:37:18,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:37:19,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:19,590 INFO L93 Difference]: Finished difference Result 7130 states and 10302 transitions. [2023-11-23 20:37:19,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:19,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2023-11-23 20:37:19,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:19,631 INFO L225 Difference]: With dead ends: 7130 [2023-11-23 20:37:19,631 INFO L226 Difference]: Without dead ends: 4703 [2023-11-23 20:37:19,647 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 20:37:19,648 INFO L413 NwaCegarLoop]: 873 mSDtfsCounter, 908 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 1738 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:19,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [908 Valid, 1738 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 225 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2023-11-23 20:37:19,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4703 states. [2023-11-23 20:37:19,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4703 to 4690. [2023-11-23 20:37:19,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4690 states, 3027 states have (on average 1.356458539808391) internal successors, (4106), 3135 states have internal predecessors, (4106), 1324 states have call successors, (1324), 347 states have call predecessors, (1324), 338 states have return successors, (1347), 1291 states have call predecessors, (1347), 1319 states have call successors, (1347) [2023-11-23 20:37:20,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4690 states to 4690 states and 6777 transitions. [2023-11-23 20:37:20,024 INFO L78 Accepts]: Start accepts. Automaton has 4690 states and 6777 transitions. Word has length 31 [2023-11-23 20:37:20,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:20,031 INFO L495 AbstractCegarLoop]: Abstraction has 4690 states and 6777 transitions. [2023-11-23 20:37:20,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 20:37:20,031 INFO L276 IsEmpty]: Start isEmpty. Operand 4690 states and 6777 transitions. [2023-11-23 20:37:20,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-23 20:37:20,035 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:20,035 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 20:37:20,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:37:20,035 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:20,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:20,036 INFO L85 PathProgramCache]: Analyzing trace with hash -304284135, now seen corresponding path program 1 times [2023-11-23 20:37:20,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:20,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853600954] [2023-11-23 20:37:20,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:20,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:20,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:20,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:37:20,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:20,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853600954] [2023-11-23 20:37:20,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853600954] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:20,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:20,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:20,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360477772] [2023-11-23 20:37:20,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:20,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:20,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:20,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:20,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:20,942 INFO L87 Difference]: Start difference. First operand 4690 states and 6777 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 20:37:23,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:37:24,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:24,225 INFO L93 Difference]: Finished difference Result 6942 states and 10091 transitions. [2023-11-23 20:37:24,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:24,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2023-11-23 20:37:24,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:24,280 INFO L225 Difference]: With dead ends: 6942 [2023-11-23 20:37:24,281 INFO L226 Difference]: Without dead ends: 6939 [2023-11-23 20:37:24,287 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 20:37:24,288 INFO L413 NwaCegarLoop]: 874 mSDtfsCounter, 903 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 1746 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:24,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [903 Valid, 1746 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 222 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2023-11-23 20:37:24,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6939 states. [2023-11-23 20:37:24,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6939 to 6920. [2023-11-23 20:37:24,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6920 states, 4461 states have (on average 1.3573189867742659) internal successors, (6055), 4627 states have internal predecessors, (6055), 1962 states have call successors, (1962), 511 states have call predecessors, (1962), 496 states have return successors, (2049), 1907 states have call predecessors, (2049), 1957 states have call successors, (2049) [2023-11-23 20:37:24,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6920 states to 6920 states and 10066 transitions. [2023-11-23 20:37:24,865 INFO L78 Accepts]: Start accepts. Automaton has 6920 states and 10066 transitions. Word has length 32 [2023-11-23 20:37:24,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:24,866 INFO L495 AbstractCegarLoop]: Abstraction has 6920 states and 10066 transitions. [2023-11-23 20:37:24,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 20:37:24,867 INFO L276 IsEmpty]: Start isEmpty. Operand 6920 states and 10066 transitions. [2023-11-23 20:37:24,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-23 20:37:24,868 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:24,869 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:24,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 20:37:24,869 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:24,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:24,870 INFO L85 PathProgramCache]: Analyzing trace with hash -843297979, now seen corresponding path program 1 times [2023-11-23 20:37:24,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:24,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037611471] [2023-11-23 20:37:24,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:24,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:25,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:37:25,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:25,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037611471] [2023-11-23 20:37:25,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037611471] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:25,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:25,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:25,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118055390] [2023-11-23 20:37:25,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:25,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:25,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:25,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:25,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:25,788 INFO L87 Difference]: Start difference. First operand 6920 states and 10066 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 20:37:27,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:37:28,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:28,636 INFO L93 Difference]: Finished difference Result 6922 states and 10067 transitions. [2023-11-23 20:37:28,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:28,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2023-11-23 20:37:28,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:28,695 INFO L225 Difference]: With dead ends: 6922 [2023-11-23 20:37:28,695 INFO L226 Difference]: Without dead ends: 6919 [2023-11-23 20:37:28,702 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 20:37:28,702 INFO L413 NwaCegarLoop]: 872 mSDtfsCounter, 966 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:28,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [966 Valid, 872 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2023-11-23 20:37:28,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6919 states. [2023-11-23 20:37:29,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6919 to 6919. [2023-11-23 20:37:29,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6919 states, 4461 states have (on average 1.3570948217888366) internal successors, (6054), 4626 states have internal predecessors, (6054), 1961 states have call successors, (1961), 511 states have call predecessors, (1961), 496 states have return successors, (2049), 1907 states have call predecessors, (2049), 1957 states have call successors, (2049) [2023-11-23 20:37:29,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6919 states to 6919 states and 10064 transitions. [2023-11-23 20:37:29,385 INFO L78 Accepts]: Start accepts. Automaton has 6919 states and 10064 transitions. Word has length 33 [2023-11-23 20:37:29,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:29,386 INFO L495 AbstractCegarLoop]: Abstraction has 6919 states and 10064 transitions. [2023-11-23 20:37:29,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 20:37:29,386 INFO L276 IsEmpty]: Start isEmpty. Operand 6919 states and 10064 transitions. [2023-11-23 20:37:29,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-23 20:37:29,388 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:29,388 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 20:37:29,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 20:37:29,388 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:29,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:29,389 INFO L85 PathProgramCache]: Analyzing trace with hash -372853092, now seen corresponding path program 1 times [2023-11-23 20:37:29,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:29,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252554447] [2023-11-23 20:37:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:29,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:30,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:37:30,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:30,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252554447] [2023-11-23 20:37:30,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252554447] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:30,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:30,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:30,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64858723] [2023-11-23 20:37:30,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:30,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:30,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:30,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:30,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:30,134 INFO L87 Difference]: Start difference. First operand 6919 states and 10064 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 20:37:32,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:37:32,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:32,985 INFO L93 Difference]: Finished difference Result 6921 states and 10065 transitions. [2023-11-23 20:37:32,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:32,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2023-11-23 20:37:32,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:33,039 INFO L225 Difference]: With dead ends: 6921 [2023-11-23 20:37:33,040 INFO L226 Difference]: Without dead ends: 6912 [2023-11-23 20:37:33,048 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 20:37:33,049 INFO L413 NwaCegarLoop]: 871 mSDtfsCounter, 963 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:33,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [963 Valid, 871 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2023-11-23 20:37:33,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6912 states. [2023-11-23 20:37:33,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6912 to 6912. [2023-11-23 20:37:33,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6912 states, 4455 states have (on average 1.3566778900112233) internal successors, (6044), 4619 states have internal predecessors, (6044), 1960 states have call successors, (1960), 511 states have call predecessors, (1960), 496 states have return successors, (2049), 1907 states have call predecessors, (2049), 1957 states have call successors, (2049) [2023-11-23 20:37:33,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6912 states to 6912 states and 10053 transitions. [2023-11-23 20:37:33,613 INFO L78 Accepts]: Start accepts. Automaton has 6912 states and 10053 transitions. Word has length 34 [2023-11-23 20:37:33,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:33,614 INFO L495 AbstractCegarLoop]: Abstraction has 6912 states and 10053 transitions. [2023-11-23 20:37:33,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 20:37:33,614 INFO L276 IsEmpty]: Start isEmpty. Operand 6912 states and 10053 transitions. [2023-11-23 20:37:33,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-23 20:37:33,619 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:33,619 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:33,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 20:37:33,620 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:33,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:33,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1115620060, now seen corresponding path program 1 times [2023-11-23 20:37:33,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:33,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692692138] [2023-11-23 20:37:33,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:33,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:34,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:34,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:37:34,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:34,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692692138] [2023-11-23 20:37:34,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692692138] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:34,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:34,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:34,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179526663] [2023-11-23 20:37:34,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:34,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:34,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:34,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:34,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:34,352 INFO L87 Difference]: Start difference. First operand 6912 states and 10053 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 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 20:37:36,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 20:37:37,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:37,451 INFO L93 Difference]: Finished difference Result 10520 states and 15295 transitions. [2023-11-23 20:37:37,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:37,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 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 66 [2023-11-23 20:37:37,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:37,470 INFO L225 Difference]: With dead ends: 10520 [2023-11-23 20:37:37,470 INFO L226 Difference]: Without dead ends: 3622 [2023-11-23 20:37:37,502 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 20:37:37,503 INFO L413 NwaCegarLoop]: 870 mSDtfsCounter, 42 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1716 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:37,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1716 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 236 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2023-11-23 20:37:37,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3622 states. [2023-11-23 20:37:37,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3622 to 3604. [2023-11-23 20:37:37,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3604 states, 2355 states have (on average 1.3634819532908704) internal successors, (3211), 2438 states have internal predecessors, (3211), 989 states have call successors, (989), 267 states have call predecessors, (989), 259 states have return successors, (1032), 961 states have call predecessors, (1032), 986 states have call successors, (1032) [2023-11-23 20:37:37,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3604 states to 3604 states and 5232 transitions. [2023-11-23 20:37:37,882 INFO L78 Accepts]: Start accepts. Automaton has 3604 states and 5232 transitions. Word has length 66 [2023-11-23 20:37:37,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:37,883 INFO L495 AbstractCegarLoop]: Abstraction has 3604 states and 5232 transitions. [2023-11-23 20:37:37,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 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 20:37:37,884 INFO L276 IsEmpty]: Start isEmpty. Operand 3604 states and 5232 transitions. [2023-11-23 20:37:37,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-23 20:37:37,887 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:37,887 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:37,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 20:37:37,888 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:37:37,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:37,889 INFO L85 PathProgramCache]: Analyzing trace with hash 816648317, now seen corresponding path program 1 times [2023-11-23 20:37:37,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:37:37,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697363401] [2023-11-23 20:37:37,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:37,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:37:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:38,862 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:37:38,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:37:38,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697363401] [2023-11-23 20:37:38,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697363401] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:38,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:38,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:37:38,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518743509] [2023-11-23 20:37:38,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:38,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:37:38,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:37:38,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:37:38,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:37:38,866 INFO L87 Difference]: Start difference. First operand 3604 states and 5232 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8)